This pair of aluminium wheel hex adapters gives a 27mm overall width to widen track and boost lateral stability on scale crawlers and trail rigs. They are compatible with AXIAL Racing SCX10 II and let you run wider wheel spacing without changing hubs or axle geometry.
Each adaptor accepts wheels with a 5mm centre hole and mounts to a 4mm threaded wheel shaft, so fit depends on matching those dimensions. The internal hex uses a Delrin locating collar to reduce axial play and keep the tyre and wheel seated under high traction loads common in crawling.
The hardware layout secures the hex reliably: one side uses an O-ring for preload, the other side uses a spring-steel retaining ring, a spring with washers, and a stainless screw to clamp the assembly. These components allow fine adjustment of retention so the wheel stays tight without binding bearing surfaces.
In use the adapters widen the wheel stance for better cornering and stability on rock gardens and technical trails, and help prevent unwanted wheel spin when a tyre loses grip. Installation is straightforward for hobby-level maintenance using standard hex drivers and basic hand tools.
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