... orientation stock stabilizerBraking valve systemDouble line-air brake,brake valve, unload valve, four-line safety valve, rally valve, ... valve, dryer Braking systemHand control valve, spring brakeDriving systemDouble line-air brake,pedal brake valve, steel tube, drum brake ... 7.5V-20(one single wheel ,no spare wheels shelves) spare wheelcrack right hole, inflation pressure single 670Kpa/double 670Kpa ...