1-3/4" SPROCKET CARRIER/BRAKE HUB WITH 5/16" THREADED HOLES

Six 5/16"-18 threaded holes on a 5-1/4" bolt circle diameter. Fits 1-¾" splined rear axle.

5/16" sprocket bolts are recommended for your 600cc Micro Sprint. ¼" bolts will eventually break. Drill out your sprocket bolt holes to 5/16" using a P drill bit size, .323".

This carrier has the larger 5/16" threads to help eliminate the broken ¼" bolts that have become way too common on high horsepower engines.