These are RC-scale adhesive crawler rubber tires designed for 1.0 inch wheels, offered by GPM as TRX4MZSP21B. The tire compound is specified as butyl super soft rubber with integrated foam inserts and internal reinforcement. The construction targets improved traction and durability for scale crawling use on rock, loose dirt, and wet surfaces.
Physical notes from the source: the tire outer dimensions are listed as 53mm x 20.5mm and the design includes a standard foam insert for sidewall support. The inner diameter is slightly undersized for a snug fit which reduces slip on the wheel, and the bead/clamping area features a longer tongue profile to aid installation. A longer fixing screw and a narrow clamp thickness are mentioned to make direct mounting and single‑hand clamping easier.
For setup and tuning: these tires provide a softer contact patch compared with harder plastic or TPU tyres, which helps conform to irregular terrain and improve low‑speed grip. Expect to adjust weight distribution and shock preload accordingly when switching to these softer tires, and verify wheel hex and screw length compatibility before final mounting. This item is an RC accessory and not intended for real vehicle use.
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