Associated RC18T Front Radial Upgrade AR899F30G by GPM  [AR899F30G]

RC18T front radial tyre, tuned sidewall response

Engineered as a front tyre set for the Associated RC18T, this pair is marked AR899F30G and uses a rubber radial profile with a 30 degree insert to manage sidewall response and steering behaviour while retaining the original wheel geometry.

Installation follows standard workshop practice: position the 30 degree insert inside each tyre, seat the tyre on a compatible RC18T front rim, then secure using the mounting method you prefer. No specialised tooling is necessary beyond common tyre tools and a wheel holder.

For setup and tuning these tyres offer a targeted method to alter front bite and initial turn-in. The radial construction combined with the specified insert angle helps maintain consistent contact patch behaviour under steering loads, providing a predictable tuning path for front-end balance adjustments.