GPM TRAXXAS TRX4M 1-inch Widened High-Adhesion Crawler Tires TRX4MZSP1213 - RC Spare Part  [TRX4MZSP1213]

1/18 TRX4M widened crawler tires

This replacement set is built for controlled, low-speed rock crawling on 1/18 scale TRX4M-compatible vehicles. The tyres use a butyl rubber tread with several foam insert choices and an internal reinforcement ring to increase sidewall support and resist tearing during frequent trail use.

Key specifications listed by the maker include a 60mm x 25mm tyre size, a factory-installed 80-degree hard sponge inside the tyre carcass, plus extra 60-degree softened sponges for setup tuning. A separate super-soft 25-degree rubber compound is placed in the tread and is reported to deliver about 35% more grip versus plastic tyres in the supplier data.

Fitment notes: the tyres are intended for 1-inch wheels; some 1/24 platforms such as the SCX24 require swapping to a 1-inch wheel before fitting. The bead and clamping geometry feature an extended tongue and longer screw positions to simplify mounting and reduce the chance of the wheel slipping during clamp-up.

Installation and tuning: the kit includes a firmer insert and softer replacements so you can tune sidewall support against conformity. Use the 80-degree insert for extra support and switch to the 60-degree sponges to increase bite on rough rock and loose surfaces. The reinforcement ring plus the butyl compound helps reduce slip in wet patches and improves resistance to tears versus some softer plastic blends.