This is an RC-scale replacement tire set designed for TRX4M 1/18 scale models, offered by GPM under part TRX4MZSP24A. The tires use a 25 degree super-soft butyl rubber compound formulated for increased grip, and include foam inserts and internal reinforcement to improve support and wear life.
The tire compound is specified as butyl rubber, not TPU or TPR, and is described as having higher adhesion on damp or rocky surfaces. Internal reinforcement and a standard foam insert enhance sidewall support and stability during low-speed rock crawling and scale trail runs. The inner diameter is intentionally snug to reduce slippage on the wheel, and the bead area features a long tongue for reliable clamping.
Installation notes: these tires are sized for 1.0 inch wheels used on 1/18 TRX4M platforms; the design accommodates a longer fixing screw for direct attachment and a narrow clamping thickness to simplify mounting. A dedicated clamping device on the wheel allows one-handed compression of wheel and tire during fitment.
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