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Hot Racing on-board power axle for the Tamiya Cold Buster or other custom R/C buildsFEATURES: - CNC machined 6061-T6 aluminum, anodized silver- Nitride hardened steel gears- 11.4:1 internal gear reduction (in addition to the pinion/ 52T spur reduction)- Compact gear case for a low center of gravity and increased ground clearance- Clear gear box cover- #45 steel axles with 12mm hex hubs- Beefy 155mm wide axle tube- Full ball bearing transmission- Aluminum servo, shock, and linkage mounts- Supports 9T to 30T 48 pitch pinion gearsYOU WILL RECEIVE: - One (1) assembled OB power axle with servo mount, bearings, steel gears, steering tie rod Knuckle, steel axles, and 12mm wheel hexesSPECIFICATIONS: - Width from wheel mounting surface to wheel mounting surface: ~250mmREQUIREMENTS: - Expert model building skills- This kit requires a linked suspension and is NOT compatible with the factory radius arm (ladder bar) suspension- 48 pitch pinion gearCOMMENTS: - A 12T, 48P pinion will produce a 49.5:1 final drive ratio- Replacement Hot Racing parts include: RSCP12SG (internal gear set), RCB12XD (axles)description revised by: SN October 25, 2017