This rear suspension link set serves as a direct replacement for the Yokomo R12/GT family, intended to correct or tweak rear link geometry on 1/12 scale electric on-road cars. The R12-21L supports the chassis models listed below and links the hub carriers to the chassis mounting points at the rear.
Compatibility is explicit: YR-R12C3, YR-R12C31, YRF-001RF, YRF-001W. The components are designed to drop into the existing mounts without chassis modification, so you can restore factory toe and roll-center settings or explore minor tuning by changing link positions.
Fitting advice: examine mount holes and fasteners for wear before fitting, locate the links in the rear mounts and fasten with the original hardware, then check that alignment is even and the suspension moves freely. For tuning, try small incremental swaps in link placement combined with other rear adjustments to refine balance.
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