Associated RC18T Rear Narrow Radial Tire for 30g Insert AR893R30G by GPM  [AR893R30G/GPM]

RC18T rear narrow radial tire

This tire pair is a scale replacement built for the Associated RC18T rear axle, supplied with one 30g insert. The narrow radial rubber profile is intended for fine tuning rear traction and handling on 1/18 short-course style rigs.

Fit and installation:

• Check that the wheel rims match Associated RC18T rear wheels before mounting the tires.
• Insert the 30g foam into each tire before seating it on the rim to ensure even fit and balance.
• Seat the tire fully, rotate the wheel to confirm smooth runout, and trim any excess bead where required for clearance.

Tuning role and handling notes:

• The 30g insert adds rear-end stability and improves mid-speed traction compared with a no-insert tyre, helping to reduce oversteer on loose or mixed surfaces.
• The narrow radial shape promotes a more predictable turn-in and a sharper rear response when a livelier feel is needed.
• Introduce these tyres as part of stepwise setup changes, adjusting one variable at a time to measure lap time or handling effects.

Care and lifespan:

• Inspect tread and sidewalls for cuts or deformation before each run.
• Remove debris after use and let tyres cool before storing.
• Replace inserts that show uneven compression or visible damage.