diff --git a/src/datasources/db/cargobikeAPI.ts b/src/datasources/db/cargobikeAPI.ts
index 4f59e36..ff47082 100644
--- a/src/datasources/db/cargobikeAPI.ts
+++ b/src/datasources/db/cargobikeAPI.ts
@@ -26,7 +26,7 @@ import { Equipment } from '../../model/Equipment';
 import { Engagement } from '../../model/Engagement';
 import { Provider } from '../../model/Provider';
 import { TimeFrame } from '../../model/TimeFrame';
-import { ActionLogger, DBUtils, LockUtils } from './utils';
+import { ActionLogger, DBUtils, genBoxDimensions, LockUtils } from './utils';
 import { EquipmentType } from '../../model/EquipmentType';
 import { BikeEventType } from '../../model/BikeEventType';
 import { UserInputError } from 'apollo-server-express';
@@ -98,11 +98,13 @@ export class CargoBikeAPI extends DataSource {
     async updateCargoBike (cargoBike: any, userId:number) {
         const keepLock = cargoBike?.keepLock;
         delete cargoBike.keepLock;
-        delete cargoBike.lendingStationId;
         const equipmentTypeIds = cargoBike?.equipmentTypeIds;
         delete cargoBike?.equipmentTypeIds;
         const equipmentIds = cargoBike?.equipmentIds;
         delete cargoBike?.equipmentIds;
+        // generate ranges for box dimensions
+        genBoxDimensions(cargoBike);
+
         await this.connection.transaction(async (entityManager: EntityManager) => {
             if (await LockUtils.isLocked(entityManager, CargoBike, 'cb', cargoBike.id, userId)) {
                 throw new GraphQLError('CargoBike locked by other user');
@@ -150,6 +152,7 @@ export class CargoBikeAPI extends DataSource {
      */
     async createCargoBike (cargoBike: any) {
         let inserts: any = {};
+        genBoxDimensions(cargoBike);
         await this.connection.transaction(async (entityManager:any) => {
             inserts = await entityManager.getRepository(CargoBike)
                 .createQueryBuilder('cb')
diff --git a/src/datasources/db/lendingstationAPI.ts b/src/datasources/db/lendingstationAPI.ts
index 97f2b6f..a0f84c6 100644
--- a/src/datasources/db/lendingstationAPI.ts
+++ b/src/datasources/db/lendingstationAPI.ts
@@ -19,7 +19,6 @@ This file is part of fLotte-API-Server.
 
 import { DataSource } from 'apollo-datasource';
 import { UserInputError } from 'apollo-server-express';
-import { GraphQLError } from 'graphql';
 import { Connection, EntityManager, getConnection } from 'typeorm';
 import { CargoBike } from '../../model/CargoBike';
 import { LendingStation } from '../../model/LendingStation';
diff --git a/src/datasources/db/utils.ts b/src/datasources/db/utils.ts
index 962297f..be8fbf1 100644
--- a/src/datasources/db/utils.ts
+++ b/src/datasources/db/utils.ts
@@ -35,6 +35,33 @@ export function genDateRange (struct: any) {
     delete struct.to;
 }
 
+/**
+ * This function prepares the cargoBike struct, to be used in an update or create.
+ * It creates the numrange attributes than can be understood by postgres.
+ * @param from
+ * @param to
+ */
+function genNumRange (from: number, to: number) {
+    if (from === null || from === undefined) {
+        from = to;
+    } else if (to === null || to === undefined) {
+        to = from;
+    }
+    return from ? '[' + from + ',' + to + ']' : null;
+}
+
+export function genBoxDimensions (cargoBike: any) {
+    cargoBike.dimensionsAndLoad.boxLengthRange = genNumRange(cargoBike.dimensionsAndLoad.minBoxLength, cargoBike.dimensionsAndLoad.maxBoxLength);
+    cargoBike.dimensionsAndLoad.boxWidthRange = genNumRange(cargoBike.dimensionsAndLoad.minBoxWidth, cargoBike.dimensionsAndLoad.maxBoxWidth);
+    cargoBike.dimensionsAndLoad.boxHeightRange = genNumRange(cargoBike.dimensionsAndLoad.minBoxHeight, cargoBike.dimensionsAndLoad.maxBoxHeight);
+    // delete this so update cargo bike works
+    delete cargoBike.dimensionsAndLoad.minBoxLength;
+    delete cargoBike.dimensionsAndLoad.maxBoxLength;
+    delete cargoBike.dimensionsAndLoad.minBoxWidth;
+    delete cargoBike.dimensionsAndLoad.maxBoxWidth;
+    delete cargoBike.dimensionsAndLoad.minBoxHeight;
+    delete cargoBike.dimensionsAndLoad.maxBoxHeight;
+}
 /**
  * Can be used in resolvers to specify, if entry is locked by other user.
  * Returns true if locked by other user.
diff --git a/src/model/CargoBike.ts b/src/model/CargoBike.ts
index da58bb9..4193a41 100644
--- a/src/model/CargoBike.ts
+++ b/src/model/CargoBike.ts
@@ -113,43 +113,50 @@ export class DimensionsAndLoad {
     lockable:boolean;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxLength: number;
+    boxLengthRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxWidth: number;
+    boxWidthRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxHeight: number;
+    boxHeightRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
-    maxWeightBox: number;
+    maxWeightBox: string;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     maxWeightLuggageRack: number;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     maxWeightTotal: number;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     bikeLength: number;
 
     @Column({
         nullable: true,
-        type: 'decimal'
+        type: 'numrange'
 
     })
     bikeWidth: number;
diff --git a/src/resolvers/cargoBikeResolver.ts b/src/resolvers/cargoBikeResolver.ts
index 386cc36..502f181 100644
--- a/src/resolvers/cargoBikeResolver.ts
+++ b/src/resolvers/cargoBikeResolver.ts
@@ -137,8 +137,6 @@ export default {
                 return new GraphQLError('Insufficient Permissions');
             }
         },
-        isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
-        isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req }),
         timeFrames (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadTimeFrame)) {
                 return dataSources.lendingStationAPI.timeFramesByCargoBikeId(parent.id);
@@ -159,8 +157,50 @@ export default {
             } else {
                 return new GraphQLError('Insufficient Permissions');
             }
+        },
+        isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
+        isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
+    },
+    DimensionsAndLoad: {
+        minBoxLength: (parent: any) => {
+            if (!parent.boxLengthRange || parent.boxLengthRange === 'empty') {
+                return null;
+            }
+            return parent.boxLengthRange ? (parent.boxLengthRange as string).split(',')[0].replace('[', '') : null;
+        },
+        maxBoxLength: (parent: any) => {
+            if (!parent.boxLengthRange || parent.boxLengthRange === 'empty') {
+                return null;
+            }
+            const str = (parent.boxLengthRange as string).split(',')[1].replace(']', '');
+            return (str.length > 0) ? str : null;
+        },
+        minBoxWidth: (parent: any) => {
+            if (!parent.boxWidthRange || parent.boxWidthRange === 'empty') {
+                return null;
+            }
+            return parent.boxWidthRange ? (parent.boxWidthRange as string).split(',')[0].replace('[', '') : null;
+        },
+        maxBoxWidth: (parent: any) => {
+            if (!parent.boxWidthRange || parent.boxWidthRange === 'empty') {
+                return null;
+            }
+            const str = (parent.boxWidthRange as string).split(',')[1].replace(']', '');
+            return (str.length > 0) ? str : null;
+        },
+        minBoxHeight: (parent: any) => {
+            if (!parent.boxHeightRange || parent.boxHeightRange === 'empty') {
+                return null;
+            }
+            return parent.boxHeightRange ? (parent.boxHeightRange as string).split(',')[0].replace('[', '') : null;
+        },
+        maxBoxHeight: (parent: any) => {
+            if (!parent.boxHeightRange || parent.boxHeightRange === 'empty') {
+                return null;
+            }
+            const str = (parent.boxHeightRange as string).split(',')[1].replace(']', '');
+            return (str.length > 0) ? str : null;
         }
-
     },
     Equipment: {
         cargoBike (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
diff --git a/src/schema/type-defs.ts b/src/schema/type-defs.ts
index 7152e31..d92729d 100644
--- a/src/schema/type-defs.ts
+++ b/src/schema/type-defs.ts
@@ -259,13 +259,16 @@ export default gql`
         hasCoverBox: Boolean!
         "cover box can be locked"
         lockable: Boolean!
-        boxLength: Float!
-        boxWidth: Float!
-        boxHeight: Float!
-        maxWeightBox: Float!
-        maxWeightLuggageRack: Float!
-        maxWeightTotal: Float!
-        bikeLength: Float!
+        minBoxLength: Float
+        maxBoxLength: Float
+        minBoxWidth: Float
+        maxBoxWidth: Float
+        minBoxHeight: Float
+        maxBoxHeight: Float
+        maxWeightBox: Float
+        maxWeightLuggageRack: Float
+        maxWeightTotal: Float
+        bikeLength: Float
         bikeWidth: Float
         bikeHeight: Float
         bikeWeight: Float
@@ -274,13 +277,16 @@ export default gql`
     input DimensionsAndLoadCreateInput {
         hasCoverBox: Boolean!
         lockable: Boolean!
-        boxLength: Float!
-        boxWidth: Float!
-        boxHeight: Float!
-        maxWeightBox: Float!
-        maxWeightLuggageRack: Float!
-        maxWeightTotal: Float!
-        bikeLength: Float!
+        minBoxLength: Float
+        maxBoxLength: Float
+        minBoxWidth: Float
+        maxBoxWidth: Float
+        minBoxHeight: Float
+        maxBoxHeight: Float
+        maxWeightBox: Float
+        maxWeightLuggageRack: Float
+        maxWeightTotal: Float
+        bikeLength: Float
         bikeWidth: Float
         bikeHeight: Float
         bikeWeight: Float
@@ -289,9 +295,12 @@ export default gql`
     input DimensionsAndLoadUpdateInput {
         hasCoverBox: Boolean
         lockable: Boolean
-        boxLength: Float
-        boxWidth: Float
-        boxHeight: Float
+        minBoxLength: Float
+        maxBoxLength: Float
+        minBoxWidth: Float
+        maxBoxWidth: Float
+        minBoxHeight: Float
+        maxBoxHeight: Float
         maxWeightBox: Float
         maxWeightLuggageRack: Float
         maxWeightTotal: Float