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Ships within 48 hours · Estimated delivery Sep 17 - Sep 22
confirm the 220mm rotor clears your bike's stock setup before install
Stiffer Chassis
Battery lid bolts (2 pcs)
RR 250 2T Race 2025-Current
Direct Tuttio Fitment — Designed specifically for Tuttio
Heavy Hitter Zero XB 420 Primary Chain Drive Conversion Kit 73 Supplies confirm the 220mm rotor clearsThe Heavy Hitter Zero XB 420 Primary Chain Drive Conversion Kit is a complete drivetrain conversion built to replace the stock belt drive on the Zero XB. Designed for riders running upgraded motors or controllers who need a drivetrain that can handle serious torque without adding unnecessary weight or rolling resistance. The lightest primary chain kit on the market with the least rotating mass and resistance of any 420 kit available. Fitment: Zero XB
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