Team Associated RC18T Rear Radial Tire Standard Rubber 40 degree Insert AR899R40G by GPM  [AR899R40G]

RC18T rear radial replacement

This rear radial tire is a scale replacement made for Team Associated RC18T rear fitments, offered as model AR899R40G. The tyre uses a standard rubber compound and a 40 degree insert to reproduce the intended profile and sidewall support for the RC18T rear axle set up.

Fitting is simple on compatible RC18T wheels: remove the worn tire, seat the new tyre on the rim bead, orient the insert to achieve the desired sidewall firmness, then trim or tuck the bead as required for your wheel type. Basic tyre levers and a hobby knife or file are sufficient for finishing.

On track this tyre is a tuning element: the 40 degree insert alters how the tyre keeps its shape under load, affecting rear traction and steering balance. Treat the insert as one variable alongside compound choice, chassis setup, and suspension geometry when optimising rear grip on carpet or hard-packed circuits.