TAMIYAM-Chassis 60D Inner Sponge Inserts (4)

These are a must for the M-Chassis 60D Super Grip Radial Tamiya Tires . They keep them firm and helps when cornering. Without these your tires will run like flats.

I use these foams inside the lower profile belted radials, so they compress quite a bit and ride nicely in me M-05