... 400cc engine 2, Clients,quality first 250cc 6.00-13 rear tire motor tricycle cargo Engine Configurationitem number: HY250ZH-2D engine ... %,HC≤800ppm starting ability ≤15s clutch type Wet Multi-Plate derailleur type Regular meshing gear type transmission ratio,junior 3.333 ... spring,outside Front wheel:5.00-12 wheels Rear wheels:6.00-13 rear wheel Spare wheel: 6.00-13 50*100mm ...