GPM Associated RC18T Rear Radial Tyre 40 Degree Insert AR893R40G Set  [AR893R40G]

Precision rear radial tyre for RC18T

This rear radial tyre is supplied as a matched pair for the Associated RC18T and is identified by part number AR893R40G. The design uses a standard rubber compound combined with a 40 degree insert to control carcass stiffness and define rear contact patch behaviour for tuning.

Fit and compatibility: engineered for RC18T rear wheel fitment, check wheel hex and offset to ensure correct seating and clearance within the rear hub assembly.

Installation notes: fit onto a compatible RC18T rear wheel, align the insert to your preferred mounting practice, and bond the bead if running glued tyre setups to maintain concentricity at high loads. Verify even seating and remove any excess material to avoid dynamic imbalance.

Tuning role: the 40 degree insert increases radial support compared with softer inserts, producing a stiffer carcass that sharpens rear response and shifts mid-corner balance. Use these tyres for methodical comparison of traction levels and rear-end handling during setup sessions.