Associated RC 18T Rear Radial Tire AR889R30G Technical Upgrade by GPM  [AR889R30G]

Associated RC 18T Rear Rubber Standard Radial Tires With Insert (30 Degree ) -1pr - GPM AR889R30G
Price:
USD$3.84
Brand:
GPM
Model:
AR889R30G
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Technical Brief - 18T Rear Radial

The AR889R30G is a 1:18 rear radial tyre produced for Associated RC 18T on-road vehicles by GPM. It features a standard rubber compound combined with an internal profile insert to stabilise the carcass under cornering and acceleration loads.

This tyre is engineered for fitment on Associated RC 18T rear hubs; the radial construction and a 30 degree specification determine the camber response and lateral behaviour when installed on typical 18T wheel assemblies. Proper bead seating and central insert placement are essential to minimise runout and ensure repeatable handling.

Intended use is as a baseline component for rear traction setup, offering consistent lateral grip and clear tuning feedback for suspension and shock adjustments. Regular inspection of the insert seating and tread condition after initial track sessions will preserve uniform performance.

What wheel tolerances should I check for fitment?

Confirm the wheel bore and hub interface match the 1/18 radial tyre envelope; small bore mismatches can affect seating and lead to imbalance.

How should I seat the insert for minimal runout?

Place the insert centrally, inflate or seat the bead evenly, then spin-check on a balancer or axle to confirm minimal runout; re-seat if necessary.

What role does the 30 degree spec play in handling?

The 30 degree specification describes expected camber behaviour under load, helping predict lateral grip changes with roll and suspension adjustments for the Associated RC 18T platform.