Go
A bit of advice, might be in order. Bob's advice is how them TQ guys change gears in them quick change thing a m bobs.
While you can buy 12 tooth sprockets, made special for us car guys. You need to know that as the front sprocket gets smaller that chain has to wrap around a smaller and smaller radius putting a lot of stress on the chain and sprocket, on top of all that the smaller the sprocket the faster the chain has to move to get around it, with a sprocket that small the chain speed is reaching super-sonic, not good for a chain either. We learned a long time ago to run as big of a front sprocket as we could to get our ratio and if it takes a 12 tooth sprocket to get it we would probably just go up two or three teeth on the rear sprocket or maybe go to a different transmission gear. We usually carry 3 different chains to the track to make gear changing easier for us.
Honest Dad himself
