This pack can be fitted to ANY TT01 or TT01E car (kit or XB Pro) and will give improved suspension response, considerable speed increase, smoother rolling and less resistance in the drive train. By altering the gear ratio the car will be marginally slower to accelerate but will hold a much higher top speed. The addition of the bearings ensures that no additional stress is made to the car by changing the gear ratio, and unlike a motor upgrade no changes are required to the ESC and there is very little reduction in run time per battery!The pack contains the following:1 x Gearing Upgrade - giving much higher top speed - GENUINE TAMIYA SPUR GEAR PACK with CARSON PINION1 x Bearing Set - full roller bearings to make the car run more smoothly4 x Oil Shock Absorbers - for better roadholding - GENUINE TAMIYA UPGRADE
