TRX4M Ford Bronco 1.0 Inch Technical Crawler Tyres for TRAXXAS - TRX4MZSP21A by GPM  [TRX4MZSP21A]

Technical overview of the butyl crawler tyre

Engineered as scale replacement tyres for TRAXXAS TRX4M Ford Bronco platforms, these tyres use a 25-degree super-soft butyl compound to increase surface adhesion by about 35% compared with standard plastic tyres. The tyre incorporates a pre-formed foam insert for structural support plus an internal reinforcement layer intended to improve tear resistance while retaining the flex characteristics required for precise low-speed crawling.

Fitment and retention details: specified for 1.0 inch wheels, the tyre bore is manufactured with a tight tolerance to limit slip on the rim. The moulded clamp area features an extended tongue and reduced clamping thickness to enhance mechanical retention on compatible rims. The design permits the use of a long fixing screw for direct attachment, and installation can be completed using a single-handed clamping tool to compress the tyre during mounting.

Performance and setup guidance: on TRX4M-scale crawlers these tyres enhance traction and lateral stability at crawl speeds; select foam firmness appropriate to wheel width and running surface, and validate bead orientation and screw torque during initial runs to ensure consistent seating under load.