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12mm Buggy Front Spring Set - P/N: 1201
Spring Rates and Specifications
- White:
Rate: 2.63lb | Wire: 1.17mm | Coil: 9.25 | Length: 44mm | ID: 16.25mm
- Yellow:
Rate: 3.06lb | Wire: 1.17mm | Coil: 8.50 | Length: 44mm | ID: 16.25mm
- Red:
Rate: 3.28lb | Wire: 1.17mm | Coil: 7.75 | Length: 44mm | ID: 16.25mm
- Purple:
Rate: 3.61lb | Wire: 1.17mm | Coil: 7.25 | Length: 44mm | ID: 16.25mm

12mm Buggy/Truck Rear Spring Set - P/N: 1200
Spring Rates and Specifications
- White:
Rate: 1.89lb | Wire: 1.17mm | Coil: 12.50 | Length: 63mm | ID: 16.25mm
- Yellow:
Rate: 1.99lb | Wire: 1.17mm | Coil: 12.50 | Length: 63mm | ID: 16.25mm
- Red:
Rate: 2.14lb | Wire: 1.17mm | Coil: 12.50 | Length: 63mm | ID: 16.25mm

B4 Aluminum Steering Bellcranks - P/N: AV1000
Tips: Assemble the steering rack screws with blue thread lock. Also, if you tighten down the 2 BH screws to hold the steering rack and you feel a bind in the movement, it could be that the steel pivot bushings are too short. Slide a thin motor shim over the screw before installation and this will prevent the screw from clamping onto the rack and causing drag.

B4.1 Carbon Fiber Rear Hub Tower - P/N: AV1013
Tips: The AV1013 Carbon Fiber Hub Towers fit the aluminum rear hubs (#9864, #9865, #9866, #9867) and contain the standard setup locations used on the “A” and “C” towers. Typically the 2mm lower rear link position is used on the B4 rear for smooth indoor tracks. It is also commonly used on the T4 for all conditions.

Satellite Front Wheel | 12mm Hex - P/N: AV1103

Satellite Rear Wheel | 12mm Hex - P/N: AV1102