Originally Posted by toker_ace
Here is a scrap part bike I'm building and I have a 3 pice crank I want to put on this bike.How do I do this? Its amazing what a set of $7.00 Cannondale Stickers from Ebay does to a Roadmaster frame. He HE!
This past spring I picked up an extra wide three piece crank to replace a one piece on an old Huffy frame in an attempt to make room for a pull start engine. I discovered that the diameter of the frame opening where the bearings fit and the crank goes through was different. As I recall the one piece was a good deal bigger. I gave up on that approach and installed a one piece short armed crank from a 20" bike. I still have that three piece wide one, but haven't found a use for it yet since I pretty much work with old cruisers. I don't know if there is some kind of reducer so that a three piece would fit or if there are different sized three piece cranks, but would like to know.