Check the listing for details. CDH Bike Conversion Kit Crank Set Bottom Bracket-Gas Motorized Bicycle 66cc/80cc. Condition: New. Listed at 27.99 USD. Key Product Features 1. Compatible with 44mm Bottom Bracket2. The length of the pedal crank shaft is about 266mm/10.47inch3. If your bike is with 2" cup of bottom bracket, you have to buy a BB Bottom Bracket Conversion Kit (American to Euro) from us https://www.ebay.com/itm/2838594028104. There's no product instruction shipped with it, please be informed. 5. This product doesn't include sprocket, if you don't have sprocket, please order this product: https://www.ebay.com/itm/283827487985 or https://www.ebay.com/itm/283831675893 Conversion Kit Crank Set Bottom Bracket for bicycle bike bottom bracketConverts 1/Piece Crank To 3/Piece Crank/ Outside diameter of cups: roughly 35mmAlso can be used on 2 stroke 66cc/80cc motorized bicycle, because the length of the Bottom Bracket is 266mm/10.47inch,This conversion kit end up as/with a square taper;this kit fit the cranks that came with the 4 stroke motor kit and also would it fit a 26" beach cruiser huffy Product DescriptionConversion Kit Crank Set Bottom Bracket for bicycle bike bottom bracketConverts 1/Piece Crank To 3/Piece Crank/Fits 3-piece crank set; Also can be used on 66cc/80cc motorized bicycle, because the length of the Bottom Bracket is 266mm/10.47inch,This conversion kit end up as/with a square taper;This kit fit the cranks that came with the 4 stroke motor kit and also would it fit a 26" beach cruiser huffy;If your bike is with 2" cup of bottom bracket, you have to buy a bottom bracket converter extra from our store or some where else.