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09-08-04, 08:22 AM
Howdy... so I'm messing with this new project bike and I've got most of the parts stripped and am looking at the bottom bracket options... what was on there was a threadless cup system that used cottered cranks... as I said, the inside is threadless with an inside diameter of just about 40 to 40.5mm ... does this diameter sound like the American Style/BMX/One-piece/Ashtabula dimensions? I'd like to just throw in some conversion cups to use the a Euro BB ... but the shell almost seems a little smaller than a normal BMX and I've been unable to find diameter/dimmension specs online - anyone know off hand the inside diameter of an American style/BMX/One-piece-crank bottom bracket shell? Thanks!...
http://www.the-wild.net/tomos/P9080020.jpg
http://www.the-wild.net/tomos/P9080032.jpg
http://www.the-wild.net/tomos/P9080030.jpg
http://www.the-wild.net/tomos/P9080020.jpg
http://www.the-wild.net/tomos/P9080032.jpg
http://www.the-wild.net/tomos/P9080030.jpg