Associated RC18T Rear Radial Tire 40 Degree Insert AR893R40G by GPM  [AR893R40G]

RC18T rear radial tire overview

This is a rear radial tire made for the Associated RC18T, supplied as a single pair under part number AR893R40G. The tire uses a standard rubber compound and a 40 degree insert to change carcass stiffness and rear contact behaviour for tuning purposes.

Fit and compatibility: this listing identifies the tyre for use with Associated RC18T rear wheels and hubs. Verify wheel hex size and wheel offset before installation to ensure correct seating and clearance on the RC18T rear assembly.

Installation notes: mount the tyre on a matching RC18T rear wheel, set the insert orientation to match your wheel mounting practice, and glue the bead if you run glued tires. Check for even seating around the rim and trim any excess to prevent imbalance.

Tuning role: the 40 degree insert increases carcass support compared with softer inserts, sharpening rear response and shifting mid-corner balance. Fit these tyres when comparing traction levels or when dialing rear-end bite versus oversteer during track testing.