Converting a 1986 Schwinn World
04-25-08, 04:56 PM
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Converting a 1986 Schwinn World
Don't know what bottom bracket size I need to buy. All I have is the frame. On the bottom of where the bottom bracket would be the bike is stamped 68K. Anybody know what size bottom bracket I need?
04-26-08, 02:47 AM
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68k most likely means 68mm. You could always visit your local bike shop for free information 
04-26-08, 03:11 AM
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This bike has a 68mm English threaded bottom bracket. The spindle length and interface will depend on which cranks you are using.
04-26-08, 09:07 AM
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I'm about to convert one of those into a fixed polo bike. Got all the parts, just need to clean and rattlecan the frame before I build it up. I'm using the stock BB with Sakae cranks, it's a 3S. If the chainline is off I'll just try a different spindle.
