diff --git a/public/images/loco-s-unknown.png b/public/images/loco-diesel-unknown.png
similarity index 100%
rename from public/images/loco-s-unknown.png
rename to public/images/loco-diesel-unknown.png
diff --git a/public/images/loco-e-unknown.png b/public/images/loco-electric-unknown.png
similarity index 100%
rename from public/images/loco-e-unknown.png
rename to public/images/loco-electric-unknown.png
diff --git a/public/images/loco-ezt-unknown.png b/public/images/unit-electric-unknown.png
similarity index 100%
rename from public/images/loco-ezt-unknown.png
rename to public/images/unit-electric-unknown.png
diff --git a/public/images/car-cargo-unknown.png b/public/images/wagon-freight-unknown.png
similarity index 100%
rename from public/images/car-cargo-unknown.png
rename to public/images/wagon-freight-unknown.png
diff --git a/public/images/car-passenger-unknown.png b/public/images/wagon-passenger-unknown.png
similarity index 100%
rename from public/images/car-passenger-unknown.png
rename to public/images/wagon-passenger-unknown.png
diff --git a/src/components/sections/InputsSection.vue b/src/components/sections/InputsSection.vue
index bff3fb8..98e67c3 100644
--- a/src/components/sections/InputsSection.vue
+++ b/src/components/sections/InputsSection.vue
@@ -9,7 +9,7 @@
             v-for="locoType in locomotiveTypeList"
             :key="locoType.id"
             class="btn btn--choice"
-            :data-selected="locoType.id == store.chosenLocoPower"
+            :data-selected="locoType.id == store.chosenLocoGroup"
             @click="selectLocoType(locoType.id)"
           >
             {{ $t(`inputs.${locoType.id}`) }}
@@ -39,7 +39,7 @@
             v-for="carType in carTypeList"
             :key="carType.id"
             class="btn btn--choice"
-            :data-selected="carType.id == store.chosenCarUseType"
+            :data-selected="carType.id == store.chosenCarGroup"
             @click="selectCarWagonType(carType.id)"
           >
             {{ $t(`inputs.${carType.id}`) }}
@@ -70,7 +70,7 @@
           id="cargo-select"
           :disabled="
             (store.chosenCar && !store.chosenCar.loadable) ||
-            (store.chosenCar && store.chosenCar.useType == 'car-passenger') ||
+            (store.chosenCar && store.chosenCar.group == 'wagon-passenger') ||
             !store.chosenCar
           "
           data-select="cargo"
@@ -123,6 +123,7 @@ import imageMixin from '../../mixins/imageMixin';
 import { useStore } from '../../store';
 import stockPreviewMixin from '../../mixins/stockPreviewMixin';
 import stockMixin from '../../mixins/stockMixin';
+import { LocoGroupType, WagonGroupType } from '../../types';
 
 export default defineComponent({
   mixins: [imageMixin, stockPreviewMixin, stockMixin],
@@ -131,33 +132,33 @@ export default defineComponent({
     store: useStore(),
     locomotiveTypeList: [
       {
-        id: 'loco-e',
+        id: 'loco-electric',
         desc: 'ELEKTRYCZNE',
       },
       {
-        id: 'loco-s',
+        id: 'loco-diesel',
         desc: 'SPALINOWE',
       },
       {
-        id: 'loco-ezt',
+        id: 'unit-electric',
         desc: 'ELEKTR. ZESPOŁY TRAKCYJNE',
       },
       {
-        id: 'loco-szt',
+        id: 'unit-diesel',
         desc: 'SPAL. ZESPOŁY TRAKCYJNE',
       },
-    ],
+    ] as { id: LocoGroupType; desc: string }[],
 
     carTypeList: [
       {
-        id: 'car-passenger',
+        id: 'wagon-passenger',
         desc: 'PASAŻERSKIE',
       },
       {
-        id: 'car-cargo',
+        id: 'wagon-freight',
         desc: 'TOWAROWE',
       },
-    ],
+    ] as { id: WagonGroupType; desc: string }[],
   }),
 
   computed: {
@@ -165,14 +166,14 @@ export default defineComponent({
       return this.store.locoDataList
         .slice()
         .sort((a, b) => (a.type > b.type ? 1 : -1))
-        .filter((loco) => loco.power == this.store.chosenLocoPower);
+        .filter((loco) => loco.group == this.store.chosenLocoGroup);
     },
 
     carOptions() {
       return this.store.carDataList
         .slice()
         .sort((a, b) => (a.type > b.type ? 1 : -1))
-        .filter((car) => car.useType == this.store.chosenCarUseType);
+        .filter((car) => car.group == this.store.chosenCarGroup);
     },
   },
 
@@ -209,14 +210,14 @@ export default defineComponent({
       this.store.stockList[this.store.chosenStockListIndex] = stockObject;
     },
 
-    selectLocoType(locoTypeId: string) {
-      this.store.chosenLocoPower = locoTypeId;
+    selectLocoType(locoGroupType: LocoGroupType) {
+      this.store.chosenLocoGroup = locoGroupType;
       this.store.chosenVehicle = this.locoOptions[0];
       this.store.chosenLoco = this.locoOptions[0];
     },
 
-    selectCarWagonType(carWagonTypeId: string) {
-      this.store.chosenCarUseType = carWagonTypeId;
+    selectCarWagonType(wagonGroupType: WagonGroupType) {
+      this.store.chosenCarGroup = wagonGroupType;
       this.store.chosenVehicle = this.carOptions[0];
       this.store.chosenCar = this.carOptions[0];
       this.store.chosenCargo = null;
diff --git a/src/components/sections/TrainImageSection.vue b/src/components/sections/TrainImageSection.vue
index 5843d45..4ab8859 100644
--- a/src/components/sections/TrainImageSection.vue
+++ b/src/components/sections/TrainImageSection.vue
@@ -20,7 +20,7 @@
       <b style="color: #ccc">
         {{
           $t(
-            `preview.${isLocomotive(store.chosenVehicle) ? store.chosenVehicle.power : store.chosenVehicle.useType}`
+            `preview.${isLocomotive(store.chosenVehicle) ? store.chosenVehicle.group : store.chosenVehicle.group}`
           )
         }}
       </b>
@@ -37,7 +37,7 @@
 
         <div v-else>
           {{
-            store.chosenVehicle.useType == 'car-cargo'
+            store.chosenVehicle.group == 'wagon-freight'
               ? $t(`usage.${store.chosenVehicle.constructionType}`)
               : `${$t('preview.construction')} ${store.chosenVehicle.constructionType}`
           }}
@@ -60,7 +60,7 @@
 <script lang="ts">
 import { computed, defineComponent } from 'vue';
 import { useStore } from '../../store';
-import { isLocomotive } from '../../utils/vehicleUtils';
+import { isTractionUnit } from '../../utils/vehicleUtils';
 import { ILocomotive, IVehicle } from '../../types';
 import imageMixin from '../../mixins/imageMixin';
 
@@ -103,7 +103,7 @@ export default defineComponent({
     },
 
     isLocomotive(vehicle: IVehicle): vehicle is ILocomotive {
-      return isLocomotive(vehicle);
+      return isTractionUnit(vehicle);
     },
 
     onImageClick(e: Event) {
diff --git a/src/components/tabs/StockGeneratorTab.vue b/src/components/tabs/StockGeneratorTab.vue
index d149ce8..61d9e08 100644
--- a/src/components/tabs/StockGeneratorTab.vue
+++ b/src/components/tabs/StockGeneratorTab.vue
@@ -290,7 +290,7 @@ export default defineComponent({
       this.store.chosenLoco = null;
       this.store.chosenCargo = null;
 
-      if (c) this.store.chosenCarUseType = c?.useType;
+      if (c) this.store.chosenCarGroup = c?.group;
     },
 
     toggleCargoChosen(cargoType: string, vehicles: string[]) {
diff --git a/src/components/tabs/StockListTab.vue b/src/components/tabs/StockListTab.vue
index 7b07b41..f410506 100644
--- a/src/components/tabs/StockListTab.vue
+++ b/src/components/tabs/StockListTab.vue
@@ -474,6 +474,7 @@ export default defineComponent({
 
 .warning {
   padding: 0.25em;
+  margin: 0.25em 0;
   background: $accentColor;
   color: black;
 
diff --git a/src/components/tabs/WikiListTab.vue b/src/components/tabs/WikiListTab.vue
index 3edaa2b..09a95fe 100644
--- a/src/components/tabs/WikiListTab.vue
+++ b/src/components/tabs/WikiListTab.vue
@@ -67,9 +67,9 @@
               </td>
 
               <td v-if="isLocomotive(vehicle)">
-                {{ $t(`wiki.${vehicle.power}`) }}
+                {{ $t(`wiki.${vehicle.group}`) }}
               </td>
-              <td v-else>{{ $t(`wiki.${vehicle.useType}`) }}</td>
+              <td v-else>{{ $t(`wiki.${vehicle.group}`) }}</td>
 
               <td>{{ vehicle.constructionType }}</td>
               <td>{{ vehicle.length }}m</td>
@@ -97,7 +97,7 @@ import { defineComponent } from 'vue';
 import { useStore } from '../../store';
 import stockPreviewMixin from '../../mixins/stockPreviewMixin';
 import { IVehicle } from '../../types';
-import { isLocomotive } from '../../utils/vehicleUtils';
+import { isTractionUnit } from '../../utils/vehicleUtils';
 import stockMixin from '../../mixins/stockMixin';
 import imageMixin from '../../mixins/imageMixin';
 
@@ -165,7 +165,7 @@ export default defineComponent({
   },
 
   methods: {
-    isLocomotive,
+    isLocomotive: isTractionUnit,
 
     toggleFilter(name: typeof this.currentFilterMode) {
       this.currentFilterMode = this.currentFilterMode == name ? 'all' : name;
@@ -198,14 +198,16 @@ export default defineComponent({
 
         case 'cargoCount':
           return (
-            (!isLocomotive(row1.vehicle) ? Math.sign(row1.vehicle.cargoTypes.length || -1) : -1) -
-            (!isLocomotive(row2.vehicle) ? (row2.vehicle.cargoTypes.length || -1) * direction : -1)
+            (!isTractionUnit(row1.vehicle) ? Math.sign(row1.vehicle.cargoTypes.length || -1) : -1) -
+            (!isTractionUnit(row2.vehicle)
+              ? (row2.vehicle.cargoTypes.length || -1) * direction
+              : -1)
           );
 
         case 'coldStart':
           return (
-            ((isLocomotive(row1.vehicle) && row1.vehicle.coldStart ? 1 : -1) -
-              (isLocomotive(row2.vehicle) && row2.vehicle.coldStart ? 1 : -1)) *
+            ((isTractionUnit(row1.vehicle) && row1.vehicle.coldStart ? 1 : -1) -
+              (isTractionUnit(row2.vehicle) && row2.vehicle.coldStart ? 1 : -1)) *
             direction
           );
 
@@ -227,8 +229,8 @@ export default defineComponent({
           show:
             new RegExp(`${this.searchedVehicleTypeName.trim()}`, 'i').test(vehicle.type) &&
             (this.currentFilterMode == 'all' ||
-              (this.currentFilterMode == 'tractions' && isLocomotive(vehicle)) ||
-              (this.currentFilterMode == 'carriages' && !isLocomotive(vehicle))),
+              (this.currentFilterMode == 'tractions' && isTractionUnit(vehicle)) ||
+              (this.currentFilterMode == 'carriages' && !isTractionUnit(vehicle))),
         }))
         .sort((a, b) => this.sortTableRows(a, b));
     },
diff --git a/src/components/utils/StockThumbnails.vue b/src/components/utils/StockThumbnails.vue
index 370aa7b..2f48b7b 100644
--- a/src/components/utils/StockThumbnails.vue
+++ b/src/components/utils/StockThumbnails.vue
@@ -43,7 +43,7 @@ const onListItemClick = (index: number) => {
 };
 
 const stockImageError = (e: Event, stock: IStock) => {
-  (e.target as HTMLImageElement).src = `images/${stock.useType}-unknown.png`;
+  (e.target as HTMLImageElement).src = `images/${stock.group}-unknown.png`;
 };
 
 watch(
diff --git a/src/enums/EVehicleUseType.ts b/src/enums/EVehicleUseType.ts
deleted file mode 100644
index 1e68311..0000000
--- a/src/enums/EVehicleUseType.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export const enum EVehicleUseType {
-  LOCO_ELECTRICAL = 'loco-e',
-  LOCO_DIESEL = 'loco-s',
-  EMU = 'loco-ezt',
-  DMU = 'loco-szt',
-
-  CAR_PASSENGER = 'car-passenger',
-  CAR_CARGO = 'car-cargo',
-}
diff --git a/src/locales/en.json b/src/locales/en.json
index 760f915..588f929 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -15,12 +15,12 @@
     "cargo-title": "Cargo (only selected freight cars)",
     "no-cargo-available": "no cargo available",
     "cargo-empty": "empty",
-    "loco-e": "ELECTR.",
-    "loco-s": "DIESEL",
-    "loco-ezt": "EMU",
-    "loco-szt": "DMU",
-    "car-passenger": "PASSENGER",
-    "car-cargo": "FREIGHT",
+    "loco-electric": "ELECTR.",
+    "loco-diesel": "DIESEL",
+    "unit-electric": "EMU",
+    "unit-diesel": "DMU",
+    "wagon-passenger": "PASSENGER",
+    "wagon-freight": "FREIGHT",
     "action-add": "ADD NEW",
     "action-swap": "SWAP WITH",
     "real-stock": "POLISH TRAIN COMPOSITIONS"
@@ -30,12 +30,12 @@
     "loading": "IMAGE LOADING...",
     "desc": "Choose a railway vehicle above to see its preview",
     "sponsor-only": "* SPONSORS ONLY UNTIL {0}",
-    "loco-e": "ELECTRIC LOCO",
-    "loco-s": "DIESEL LOCO",
-    "loco-ezt": "ELECTRIC M.U.",
-    "loco-szt": "DIESEL M.U.",
-    "car-passenger": "PASSENGER CARRIAGE",
-    "car-cargo": "FREIGHT CARRIAGE",
+    "loco-electric": "ELECTRIC LOCO",
+    "loco-diesel": "DIESEL LOCO",
+    "unit-electric": "ELECTRIC M.U.",
+    "unit-diesel": "DIESEL M.U.",
+    "wagon-passenger": "PASSENGER CARRIAGE",
+    "wagon-freight": "FREIGHT CARRIAGE",
     "cabin": "Cabin type:",
     "construction": "Construction type:"
   },
@@ -68,7 +68,7 @@
     "coldstart-info": "Locomotive cold start",
     "doublemanning-info": "Double manning",
     "list-empty": "Stock list is empty!",
-    "warning-not-suitable": "EP07 & EP08 type locomotives are designed for passenger traffic only!",
+    "warning-not-suitable": "EP series locomotives are designed for passenger traffic only!",
     "warning-passenger-too-long": "Maximum length of a passenger train may not be greater than 350m!",
     "warning-freight-too-long": "Maximum length of a freight train may not be greater than 650m!",
     "warning-too-many-locos": "This train has too many traction units!",
@@ -173,12 +173,12 @@
       "maxSpeed": "Speed",
       "cargoCount": "Cargo count"
     },
-    "loco-ezt": "EMU",
-    "loco-szt": "DMU",
-    "loco-s": "Diesel locomotive",
-    "loco-e": "Electric locomotive",
-    "car-passenger": "Passenger carriage",
-    "car-cargo": "Frieght carriage"
+    "unit-electric": "EMU",
+    "unit-diesel": "DMU",
+    "loco-diesel": "Diesel locomotive",
+    "loco-electric": "Electric locomotive",
+    "wagon-passenger": "Passenger carriage",
+    "wagon-freight": "Frieght carriage"
   },
   "realstock": {
     "title": "POLISH TRAIN COMPOSITIONS by",
diff --git a/src/locales/pl.json b/src/locales/pl.json
index 9a2ff76..9bbd010 100644
--- a/src/locales/pl.json
+++ b/src/locales/pl.json
@@ -15,12 +15,12 @@
     "cargo-title": "Ładunek (tylko wybrane towarowe)",
     "no-cargo-available": "brak dostępnych ładunków",
     "cargo-empty": "próżny",
-    "loco-e": "ELEKTR.",
-    "loco-s": "SPAL.",
-    "loco-ezt": "EZT",
-    "loco-szt": "SZT",
-    "car-passenger": "PASAŻERSKIE",
-    "car-cargo": "TOWAROWE",
+    "loco-electric": "ELEKTR.",
+    "loco-diesel": "SPAL.",
+    "unit-electric": "EZT",
+    "unit-diesel": "SZT",
+    "wagon-passenger": "PASAŻERSKIE",
+    "wagon-freight": "TOWAROWE",
     "action-add": "DODAJ NOWY",
     "action-swap": "ZAMIEŃ ZA",
     "real-stock": "REALNE ZESTAWIENIA"
@@ -30,12 +30,12 @@
     "loading": "ŁADOWANIE OBRAZU...",
     "desc": "Wybierz pojazd lub wagon, aby zobaczyć jego podgląd powyżej",
     "sponsor-only": "* TYLKO DLA SPONSORÓW DO {0}",
-    "loco-e": "ELEKTROWÓZ",
-    "loco-s": "SPALINOWÓZ",
-    "loco-ezt": "EZT",
-    "loco-szt": "SZT",
-    "car-passenger": "WAGON PASAŻERSKI",
-    "car-cargo": "WAGON TOWAROWY",
+    "loco-electric": "ELEKTROWÓZ",
+    "loco-diesel": "SPALINOWÓZ",
+    "unit-electric": "EZT",
+    "unit-diesel": "SZT",
+    "wagon-passenger": "WAGON PASAŻERSKI",
+    "wagon-freight": "WAGON TOWAROWY",
     "cabin": "Typ kabiny:",
     "construction": "Typ konstrukcji:"
   },
@@ -68,7 +68,7 @@
     "coldstart-info": "Zimny start",
     "doublemanning-info": "Podwójna obsada",
     "list-empty": "Lista pojazdów jest pusta!",
-    "warning-not-suitable": "Lokomotywy EP07 i EP08 są przeznaczone jedynie do ruchu pasażerskiego!",
+    "warning-not-suitable": "Lokomotywy serii EP są przeznaczone jedynie do ruchu pasażerskiego!",
     "warning-passenger-too-long": "Maksymalna długość składów pasażerskich nie może przekraczać 350m!",
     "warning-freight-too-long": "Maksymalna długość składów innych niż pasażerskie nie może przekraczać 650m!",
     "warning-too-many-locos": "Ten skład posiada za dużo pojazdów trakcyjnych!",
@@ -173,12 +173,12 @@
       "maxSpeed": "Prędkość",
       "cargoCount": "Ładunki"
     },
-    "loco-ezt": "EZT",
-    "loco-szt": "SZT",
-    "loco-s": "Spalinowóz",
-    "loco-e": "Elektrowóz",
-    "car-passenger": "Wagon pasażerski",
-    "car-cargo": "Wagon towarowy"
+    "loco-diesel": "Spalinowóz",
+    "loco-electric": "Elektrowóz",
+    "unit-electric": "EZT",
+    "unit-diesel": "SZT",
+    "wagon-passenger": "Wagon pasażerski",
+    "wagon-freight": "Wagon towarowy"
   },
   "realstock": {
     "title": "ZESTAWIENIA REALNE by",
diff --git a/src/mixins/stockMixin.ts b/src/mixins/stockMixin.ts
index e146482..41712f7 100644
--- a/src/mixins/stockMixin.ts
+++ b/src/mixins/stockMixin.ts
@@ -1,7 +1,7 @@
 import { defineComponent } from 'vue';
 import { useStore } from '../store';
 import { ICarWagon, ILocomotive, IStock, ICargo, IVehicle } from '../types';
-import { isLocomotive } from '../utils/vehicleUtils';
+import { isTractionUnit } from '../utils/vehicleUtils';
 
 export default defineComponent({
   setup() {
@@ -16,7 +16,7 @@ export default defineComponent({
     },
 
     getStockObject(vehicle: IVehicle, cargo?: ICargo | null, count = 1): IStock {
-      const isLoco = isLocomotive(vehicle);
+      const isLoco = isTractionUnit(vehicle);
 
       return {
         id: this.getStockId(),
@@ -27,8 +27,7 @@ export default defineComponent({
         isLoco,
         cargo: !isLoco && vehicle.loadable && cargo ? cargo : undefined,
         count,
-        imgSrc: vehicle.imageSrc,
-        useType: isLoco ? vehicle.power : vehicle.useType,
+        group: isLoco ? vehicle.group : vehicle.group,
         isSponsorsOnly: vehicle.isSponsorsOnly,
         constructionType: vehicle.constructionType,
         sponsorsOnlyTimestamp: vehicle.sponsorsOnlyTimestamp,
diff --git a/src/mixins/stockPreviewMixin.ts b/src/mixins/stockPreviewMixin.ts
index 22a54c8..ee327ac 100644
--- a/src/mixins/stockPreviewMixin.ts
+++ b/src/mixins/stockPreviewMixin.ts
@@ -1,7 +1,7 @@
 import { defineComponent } from 'vue';
 import { useStore } from '../store';
-import { ICarWagon, ILocomotive, IStock, IVehicle } from '../types';
-import { isLocomotive } from '../utils/vehicleUtils';
+import { ICarWagon, ILocomotive, IStock, IVehicle, LocoGroupType, WagonGroupType } from '../types';
+import { isTractionUnit } from '../utils/vehicleUtils';
 
 export default defineComponent({
   setup() {
@@ -14,40 +14,40 @@ export default defineComponent({
 
   methods: {
     previewStock(stock: IStock) {
-      if (this.store.chosenVehicle?.imageSrc != stock.imgSrc) this.store.imageLoading = true;
+      // if (this.store.chosenVehicle?.imageSrc != stock.imgSrc) this.store.imageLoading = true;
 
       if (stock.isLoco) {
         const chosenLoco = this.store.locoDataList.find((v) => v.type == stock.type) || null;
         this.store.chosenVehicle = chosenLoco;
         this.store.chosenLoco = chosenLoco;
         this.store.chosenCargo = null;
-        this.store.chosenLocoPower = stock.useType;
+        this.store.chosenLocoGroup = stock.group as LocoGroupType;
       } else {
         const chosenCar = this.store.carDataList.find((v) => v.type == stock.type) || null;
         this.store.chosenVehicle = chosenCar;
         this.store.chosenCar = chosenCar;
 
         this.store.chosenCargo = stock.cargo || null;
-        this.store.chosenCarUseType = stock.useType;
+        this.store.chosenCarGroup = stock.group as WagonGroupType;
       }
     },
 
     previewLocomotive(loco: ILocomotive) {
       this.store.chosenLoco = loco;
       this.store.chosenVehicle = loco;
-      this.store.chosenLocoPower = loco.power;
+      this.store.chosenLocoGroup = loco.group;
     },
 
     previewCarWagon(carWagon: ICarWagon) {
       this.store.chosenCar = carWagon;
-      this.store.chosenCarUseType = carWagon.useType;
+      this.store.chosenCarGroup = carWagon.group;
       this.store.chosenVehicle = carWagon;
 
       this.store.chosenCargo = null;
     },
 
     previewVehicle(vehicle: IVehicle) {
-      if (isLocomotive(vehicle)) this.previewLocomotive(vehicle);
+      if (isTractionUnit(vehicle)) this.previewLocomotive(vehicle);
       else this.previewCarWagon(vehicle);
     },
 
diff --git a/src/store.ts b/src/store.ts
index a19e4ff..1187549 100644
--- a/src/store.ts
+++ b/src/store.ts
@@ -6,6 +6,8 @@ import {
   IVehicle,
   IStock,
   IRealComposition,
+  LocoGroupType,
+  WagonGroupType,
 } from './types';
 import { defineStore } from 'pinia';
 import {
@@ -33,8 +35,8 @@ export const useStore = defineStore({
 
     imageLoading: false,
 
-    chosenLocoPower: 'loco-e',
-    chosenCarUseType: 'car-passenger',
+    chosenLocoGroup: 'loco-electric' as LocoGroupType,
+    chosenCarGroup: 'wagon-passenger' as WagonGroupType,
 
     stockList: [] as IStock[],
     cargoOptions: [] as any[][],
@@ -123,8 +125,10 @@ export const useStore = defineStore({
   actions: {
     async fetchVehiclesAPI() {
       try {
-        const vehiclesData = (await http.get<IVehiclesAPI>('/vehicles.json')).data;
+        const vehiclesData = (await http.get<IVehiclesAPI>('/vehiclesData')).data;
         this.vehiclesAPIData = vehiclesData;
+
+        console.log(vehiclesData);
       } catch (error) {
         console.error(error);
       }
diff --git a/src/types.ts b/src/types.ts
index 4b98cc4..848562a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,18 +1,19 @@
 export type IVehicle = ILocomotive | ICarWagon;
 export type StockSectionMode = 'STOCK_LIST' | 'STOCK_GENERATOR';
 
-export type TLocoGroup = 'loco-e' | 'loco-s' | 'loco-ezt' | 'loco-szt';
-export type TCarWagonGroup = 'car-passenger' | 'car-cargo';
+export type LocoGroupType = 'loco-electric' | 'loco-diesel' | 'unit-electric' | 'unit-diesel';
+export type WagonGroupType = 'wagon-passenger' | 'wagon-freight';
+export type VehicleGroupType = LocoGroupType & WagonGroupType;
 
-export interface IStockProps {
+export interface IVehicleProps {
   type: string;
+  speed: number;
   length: number;
-  // mass: number;
   weight: number;
-  // cargo?: string | null;
-  cargoTypes: ICargo[] | null;
+  cargoTypes?: ICargo[];
   coldStart?: boolean;
   doubleManned?: boolean;
+  supporterTimestamp?: number;
 }
 
 export interface ICargo {
@@ -29,16 +30,18 @@ export interface IVehiclesAPI {
     };
   };
 
-  vehicleInfo: {
-    'car-cargo': [string, string, boolean, number | null, string][];
-    'car-passenger': [string, string, boolean, number | null, string][];
-    'loco-e': [string, string, string, string, number | null][];
-    'loco-s': [string, string, string, string, number | null][];
-    'loco-szt': [string, string, string, string, number | null][];
-    'loco-ezt': [string, string, string, string, number | null][];
-  };
+  vehicleList: string[][];
 
-  vehicleProps: IStockProps[];
+  // vehiclesList: {
+  //   'loco-electric': string[][];
+  //   'loco-diesel': string[][];
+  //   'unit-electric': string[][];
+  //   'unit-diesel': string[][];
+  //   'wagon-passenger': string[][];
+  //   'wagon-freight': string[][];
+  // };
+
+  vehicleProps: IVehicleProps[];
 
   vehicleLocales: {
     pl: {
@@ -56,14 +59,12 @@ export interface IVehiclesAPI {
 
 export interface ILocomotive {
   type: string;
-  power: TLocoGroup;
-  group: TLocoGroup;
+  group: LocoGroupType;
   constructionType: string;
   cabinType: string;
   maxSpeed: number;
   isSponsorsOnly: boolean;
   sponsorsOnlyTimestamp: number;
-  imageSrc: string;
   weight: number;
   length: number;
   coldStart: boolean;
@@ -72,14 +73,12 @@ export interface ILocomotive {
 
 export interface ICarWagon {
   type: string;
-  useType: TCarWagonGroup;
-  group: TCarWagonGroup;
+  group: WagonGroupType;
   constructionType: string;
   loadable: boolean;
   isSponsorsOnly: boolean;
   sponsorsOnlyTimestamp: number;
   maxSpeed: number;
-  imageSrc: string;
   weight: number;
   length: number;
   cargoTypes: ICargo[];
@@ -88,10 +87,9 @@ export interface ICarWagon {
 export interface IStock {
   id: string;
   type: string;
-  useType: string;
+  group: LocoGroupType | WagonGroupType;
   constructionType: string;
   length: number;
-  // mass: number;
   weight: number;
   maxSpeed: number;
   cargo?: ICargo;
@@ -99,7 +97,6 @@ export interface IStock {
   isSponsorsOnly: boolean;
   sponsorsOnlyTimestamp: number;
   count: number;
-  imgSrc?: string;
 }
 
 export interface IRealComposition {
diff --git a/src/utils/vehicleUtils.ts b/src/utils/vehicleUtils.ts
index 886db40..d32bc28 100644
--- a/src/utils/vehicleUtils.ts
+++ b/src/utils/vehicleUtils.ts
@@ -1,5 +1,11 @@
-import { EVehicleUseType } from '../enums/EVehicleUseType';
-import { ICarWagon, ILocomotive, IStock, IVehiclesAPI, TCarWagonGroup, TLocoGroup } from '../types';
+import {
+  ICarWagon,
+  ILocomotive,
+  IStock,
+  IVehiclesAPI,
+  LocoGroupType,
+  WagonGroupType,
+} from '../types';
 import {
   MassLimitLocoType,
   SpeedLimitLocoType,
@@ -7,44 +13,41 @@ import {
   calculateSpeedLimit,
 } from './vehicleLimitsUtils';
 
-export function isLocomotive(vehicle: ILocomotive | ICarWagon): vehicle is ILocomotive {
-  return (vehicle as ILocomotive).power !== undefined;
+export function isTractionUnit(vehicle: ILocomotive | ICarWagon): vehicle is ILocomotive {
+  return (vehicle as ILocomotive).cabinType !== undefined;
 }
 
 export function locoDataList(vehiclesData: IVehiclesAPI | undefined) {
   if (!vehiclesData) return [];
 
-  return Object.keys(vehiclesData.vehicleInfo).reduce((acc, vehiclePower) => {
-    if (!vehiclePower.startsWith('loco')) return acc;
+  return vehiclesData.vehicleList.reduce((acc, vehicleInfoArray) => {
+    // check if data array has 4 elements (locos & units only)
+    if (vehicleInfoArray.length != 4) return acc;
 
-    const locoVehiclesData = vehiclesData.vehicleInfo[vehiclePower as TLocoGroup];
+    const [type, constructionType, cabinType, group] = vehicleInfoArray;
+    const locoProps = vehiclesData.vehicleProps.find((prop) => constructionType == prop.type);
 
-    locoVehiclesData.forEach((loco) => {
-      // if (!loco[4]) return;
+    if (!locoProps) {
+      console.warn('No loco props', type);
+      return acc;
+    }
 
-      const [type, constructionType, cabinType, maxSpeed, sponsorsTimestamp] = loco;
-      const locoProps = vehiclesData.vehicleProps.find((prop) => constructionType == prop.type);
+    acc.push({
+      group: group as LocoGroupType,
 
-      acc.push({
-        power: vehiclePower as TLocoGroup,
-        group: vehiclePower as TLocoGroup,
-        type,
-        constructionType,
-        cabinType,
-        maxSpeed: Number(maxSpeed),
-        isSponsorsOnly: Number(sponsorsTimestamp) > Date.now(),
-        sponsorsOnlyTimestamp: Number(sponsorsTimestamp),
-        imageSrc: '',
+      type,
+      constructionType,
+      cabinType,
 
-        length:
-          locoProps?.length && type.startsWith('2EN')
-            ? locoProps.length * 2
-            : locoProps?.length ?? 0,
-        weight: locoProps?.weight && type.startsWith('2EN') ? 253000 : locoProps?.weight ?? 0,
+      isSponsorsOnly: (locoProps.supporterTimestamp ?? 0) > Date.now(),
+      sponsorsOnlyTimestamp: locoProps.supporterTimestamp ?? 0,
 
-        coldStart: locoProps?.coldStart ?? false,
-        doubleManned: locoProps?.doubleManned ?? false,
-      });
+      maxSpeed: locoProps.speed,
+      length: locoProps.length,
+      weight: locoProps.weight,
+
+      coldStart: locoProps.coldStart ?? false,
+      doubleManned: locoProps.doubleManned ?? false,
     });
 
     return acc;
@@ -54,35 +57,30 @@ export function locoDataList(vehiclesData: IVehiclesAPI | undefined) {
 export function carDataList(vehiclesData: IVehiclesAPI | undefined) {
   if (!vehiclesData) return [];
 
-  return Object.keys(vehiclesData.vehicleInfo).reduce((acc, vehicleUseType) => {
-    if (!vehicleUseType.startsWith('car')) return acc;
+  return vehiclesData.vehicleList.reduce((acc, vehicleInfoArray) => {
+    // check if data array has 3 elements (wagons only)
+    if (vehicleInfoArray.length != 3) return acc;
 
-    const carVehiclesData = vehiclesData.vehicleInfo[vehicleUseType as TCarWagonGroup];
+    const [type, constructionType, group] = vehicleInfoArray;
+    const wagonProps = vehiclesData.vehicleProps.find((v) => type.toString().startsWith(v.type));
 
-    carVehiclesData.forEach((car) => {
-      const [type, constructionType, loadable, sponsorsOnlyTimestamp, maxSpeed] = car;
+    if (!wagonProps) {
+      console.warn('No wagon props', type);
+      return acc;
+    }
 
-      if (sponsorsOnlyTimestamp && Number(sponsorsOnlyTimestamp) <= Date.now()) return;
+    acc.push({
+      group: group as WagonGroupType,
+      type,
+      constructionType,
+      loadable: wagonProps.cargoTypes ? wagonProps.cargoTypes.length > 0 : false,
+      isSponsorsOnly: (wagonProps.supporterTimestamp ?? 0) > Date.now(),
+      sponsorsOnlyTimestamp: wagonProps.supporterTimestamp ?? 0,
+      cargoTypes: wagonProps?.cargoTypes ?? [],
 
-      const carPropsData = vehiclesData.vehicleProps.find((v) =>
-        type.toString().startsWith(v.type)
-      );
-
-      acc.push({
-        useType: vehicleUseType as TCarWagonGroup,
-        group: vehicleUseType as TCarWagonGroup,
-        type,
-        constructionType,
-        loadable,
-        isSponsorsOnly: Number(sponsorsOnlyTimestamp) > Date.now(),
-        sponsorsOnlyTimestamp: Number(sponsorsOnlyTimestamp),
-        maxSpeed: Number(maxSpeed),
-        imageSrc: '',
-        cargoTypes: carPropsData?.cargoTypes ?? [],
-
-        weight: carPropsData?.weight || 0,
-        length: carPropsData?.length || 0,
-      });
+      maxSpeed: wagonProps.speed,
+      weight: wagonProps?.weight || 0,
+      length: wagonProps?.length || 0,
     });
 
     return acc;
@@ -142,5 +140,5 @@ export function isTrainPassenger(stockList: IStock[]) {
 
   return stockList
     .filter((stock) => !stock.isLoco)
-    .every((stock) => stock.useType === EVehicleUseType.CAR_PASSENGER);
+    .every((stock) => stock.group === 'wagon-passenger');
 }
diff --git a/vite.config.ts b/vite.config.ts
index 24b22c2..f3609af 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -37,7 +37,7 @@ export default defineConfig({
             },
           },
           {
-            urlPattern: /^https:\/\/static.spythere.eu\/.*/i,
+            urlPattern: /^https:\/\/static.spythere.eu\/images\/.*/i,
             handler: 'CacheFirst',
             options: {
               cacheName: 'spythere-api-cache',