GPM Associated RC18T Rear Radial Tire 30 degree Insert AR899R30G Set  [AR899R30G]

Associated RC 18T Rear Rubber Standard Radial Tires With Insert (30 Degree ) -1p - GPM AR899R30G
Price:
USD$3.84
Brand:
GPM
Model:
AR899R30G
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Technical overview for RC18T rear radial

This single rear radial tyre is specified for the Associated RC18T, part AR899R30G. It features a rubber radial carcass with a dedicated internal insert and a 30 degree shoulder profile designed to maintain section integrity under dynamic load.

Fitment is specific to RC18T rear wheel applications and the item is supplied as 1 pcs. The radial geometry combined with the internal insert preserves contact patch consistency, supporting predictable tuning adjustments.

Installation follows standard tyre fitting procedures - locate the insert inside the tyre, seat evenly on the rim, trim excess and balance to eliminate runout. Fine tuning via insert thickness or lateral offset will produce measurable changes in rear bite and rotation for track tuning.

What is the best way to evaluate insert thickness?

Measure baseline handling on a known setup, then swap to a thicker or thinner insert and log changes in rotation and corner exit to quantify effects.

How should I prepare the tyre for repeatable testing?

Ensure consistent seating, trim excess uniformly and balance each wheel; document insert and offset settings so comparisons remain controlled.

Are there quick checks for fitment issues?

Inspect tyre seating, confirm no bulges at the bead and spin the wheel to check for wobble; address any irregularities before track testing.