I have a single speed beach cruiser I purchased out in CA while I was working out there. I am now wondering what is involved in converting the bike to a multi speed. I was just going to add the geared cassete to the rear axle and add a SBP shift kit, but what do I need to change to do this? Change the rear axle?, Crank shaft?, What else? I will be adding caliper brakes to replace coaster brake. Ideas appreciated.
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