Just browsing eBay and I see a seller that has an sbp shift kit look alike BUT it has three chain wheels on the freewheel crank instead of just 1. This means you could have up to 27 speeds instead of 9 like normal. It comes with an electric motor but has anyone tried this with a gas motor?
http://www.ebay.com/itm/48v-1200w-S...41?pt=LH_DefaultDomain_15&hash=item4abc81fdd9
Scroll down and you'll see it.
http://www.ebay.com/itm/48v-1200w-S...41?pt=LH_DefaultDomain_15&hash=item4abc81fdd9
Scroll down and you'll see it.
