Please Note: This RPM Dual Spare Tyre Carrier fits the Traxxas Slash 2wd & Slash 4×4 when used in conjunction with an RPM rear bumper (Slash 4WD 80122, 80123 & 80125 or Slash 2WD 81002, 81003 and 81005). The RPM Spare Tyre will not work with stock or any other aftermarket rear bumpers. Two wheels and two tires in the 2.2/3.0 size (not included) must be installed in order to satisfy the RPM warranty program. The only wheels with the correct offsets that will work with the RPM Spare Tire Carrier are stock offset Traxxas Slash 4×4 (front or rear), Slash 2wd (rear) or RPM 82332 black or 82333 chrome Revolver wheels. Tires must be 2.2/3.0, short course specific (not included) with an overall tire diameter of 4-5/16 or 109mm (common to most short course tires). Slightly larger diameter tires may be run if you want the appearance of flat tires. Body modification is required to allow the Spare Tire Carrier to fit correctly.