This RC axle shim is listed as Yokomo YOKR12-24SSB and measures 6.4 x 8.5 x 0.127 mm, intended for use on X12, GT and YR10 chassis. It is a slim spacer designed to sit at axle interfaces where precise lateral clearance or preload is required.
Practical uses include adjusting axle endplay, removing small lateral movement between hub and bearing seating areas, and ensuring consistent wheel offset or gear mesh in setups with tight tolerances. Each shim is 0.127 mm thick; combine multiple shims to reach the total thickness needed while keeping other parts unchanged.
To fit, place the shim where your chassis instructions indicate or where you observe play, then test rotation and seating for a secure, smooth outcome. After installation, recheck bearings and gear engagement to make sure there is no binding. This shim is supplied as a setup aid and not intended as a structural replacement.
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