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This is a replacement or add-on trim ring for Kartboy’s StackLock™ shift knob platform. The ring sits between the topper and the core and threads into place when the knob is assembled. It fits every StackLock™ knob, both Tarmac and Gravel.
It is machined from billet 6061-T6 aluminum and anodized. A locating tooth keeps the ring in the cor
