how to build a cargo bike

{"cid":"91193205","title":"Multifunctional Tricycle Cargo Bike Adults Three Wheel Cargo Tricycle","imgUrl":"https:\/\/img.chinax.com\/nimg\/4c\/9c\/76d034e9a0a1bae13245488545f2-200x200-1.jpg","attrs":{"Price":"","Brand Name":"EQTBike","Model Number":"Bike Cargo-01","Minimum Order Quantity":"1 set","Delivery Time":"5-8 weeks","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T, Western Union","Supply Ability":"200sets per month","Packaging Details":"1.Packing details for our cargo bikes 2.Sample packing: steel frame + wooden panel 3.FCL container will be directly load the container","Material":"Metal","Color":"white, black or oem","Style":"Multifunctional","Usage":"Pick up children from school or goods","Foldable":"no"}}

{"cid":"91148789","title":"German Warehouse HovCart EU\/US\/AU Stock Electric City Cargo Bike for Two Children with Protection Seat Torque Sensor Fat Tire","imgUrl":"https:\/\/img.chinax.com\/nimg\/47\/03\/59c5a392be62d24f0b365061cd9e-200x200-1.jpg","attrs":{"Price":"$651-751","Brand Name":"HOVSCO, OEM","Model Number":"HOVCART","Minimum Order Quantity":"1","Place of Origin":"Guangdong, China","Gears":"7 Speed","Range per Power":"> 60 km","Frame Material":"Aluminum","Wheel Size":"20\"","Max Speed":"30-50Km\/h, 32km\/h for US\/25km\/h for EU, switch 45km\/h by our app 'Yeestep'","Voltage":"48 V","Power Supply":"Lithium Battery","Braking System":"Hydraulic Disc Brake","Torque":"80-90 Nm","Charging Time":">3 hours","Motor position":"Rear Hub Motor","Battery Position":"Down Tube","Packaging":"HOVSCO","Battery Capacity":"15AH, 15AH","Smart Type":"Sensor, Bluetooth, Electronic, LONG RANGE, High Speed","Application":"City, Adults, Family, Children's Seat with Protection, Cargo","Special Feature":"Lightweight, Headlight, Dual Suspension, dual disc brake, Torque sensor","Driven Type":"Electric, Manual, pedal-assist","motor":"Brushless, Rated 750W - Max 1500W","Type":"City bike, EBIKE, Cargo ebike, Family Ebike, Ebike with children's seat","Brake":"Hydraulic Disc Brake","Motor Power":"750W - 1500W","Suspension Type":"Front","Battery Type":"Lithium Ion","Power Source":"Lithium Battery, Rechargeable, Wall Plug","Display Type":"LCD Display","Bicycle Gear Shifter Type":"Thumb","Max. loading":"204kg","Max Climbing":"30\u00b0","Product unfold Size":"1920*705*1180mm","Net Weight":"35.1 kg","Tire Size":"20\" * 3.0 Air tire","Frame":"Aluminum","Sensor":"Torque Sensor","Fenders":"with","Loading Qty (40HQ ) (PCS)":"260"}}

{"cid":"91223302","title":"Brushless Motor Electric Cargo Tricycle Featuring Lithium ion Battery and 450 10 Vacuum Tyre Designed for Cargo Delivery","imgUrl":"https:\/\/img.chinax.com\/nimg\/97\/4e\/25093c6a802736cb10789d6dc2f4-200x200-1.jpg","attrs":{"Model Number":"Electric tricycle","Place of Origin":"china","Maximum Speed":"30-50Km\/h","Warranty":"1 Year","Motor Type":"Brushless","Front Fork":"Hydraulic Braking Front Shock Absorber","Pure Electric Range":"65Km And Above","Grade Ability":"10-15\u00b0","Weight":"265kg","Brake Type":"Disc"}}

{"cid":"91212239","title":"200cc 2m Cargo Motor Tricycle Manual Clutch Water Cooled Delivery Bike","imgUrl":"https:\/\/img.chinax.com\/nimg\/44\/b6\/bf2cab85fb5a758274d9a8e9824c-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"BAMX","Model Number":"BX200ZH","Minimum Order Quantity":"10","Delivery Time":"40-45 work days","Certification":"CCC","Place of Origin":"Chongqing, China","Payment Terms":"T\/T, L\/C","Supply Ability":"10000 unit per year","Packaging Details":"SKD, CKD","Engine:":"200cc water-cool engine","Economic oil consumption:":"\u2264 2.8(L\/100km)","Light:":"Prince style headlight","Brake:":"rear axle 220 brake drum","Cargo Box:":"1.4*2m stronger cargo box","Tyre:":"4.50-12 tyre, with spare tyre 5.00-12","Shock Absorber:":"strong front shock absorber"}}

{"cid":"91225379","title":"72V 75Ah LiFePO4 Battery 5760Wh for E-Bikes\/Scooters 1500 Cycles 0-55 Operating Temp","imgUrl":"https:\/\/img.chinax.com\/nimg\/43\/c3\/3ab82e72c2f0aafb241ecca8e03b-200x200-1.jpg","attrs":{"Price":"$179-610 \/ unit","Brand Name":"BTR","Model Number":"72V 75Ah","Minimum Order Quantity":"10 units","Place of Origin":"China","Certification":"CE\u3001ISO\u3001UN38.3","Payment Terms":"L\/C\u3001T\/T","Supply Ability":"1000units per month","Max Load Quantity(cells)":"495g","Battery Type":"Liquid","Cycle Life":"1500 cycles","Dimension (L*W*H)":"480*320*185(MM)","Application":"Electric Bicycles\/Scooters","Weight":"40kg","Operating Temperature(\u2103)":"0-55\u2103","Cathode Materials":"LiFePO4"}}