These upgrade aluminum clamping wheel hexes fit:

Swing Dogbone

which is almost a full volt less than a 2 Cell Li-Poly battery

Toe angle and track width can be adjusted by changing the resin bushings

If not listed

Tamiya - JR Night Hunter (FM-A Chassis) Bodies 1/7 Scale These upgrade aluminum clamping wheelThis Mini 4WD racing machine recreates the fictitious Night Hunter race car. The FM A Chassis is a front motor unit with refined aerodynamics. It joins the Mini 4WD series with the center of gavity closer to the front. It features a front skid bar as a standard part. There are also four rollers and the rear rollers are 8mm thick for stability. Easy access motor position Assembly kit snaps together Sleek and Sporty body comes in black and included is