Classic & Vintage - BB size on an 87 Schwinn World?
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11-15-08, 06:54 PM
I hear the World Sport is the standard 68mm english threading.. Wondering if the same is true for the World.. I've done a lot of searching but I can't seem to find it.. I'm looking to upgrade my cranks and bb with some new components. Any help would be greatly appreciated.
11-15-08, 07:46 PM
Both the '87 World and World Sport almost certainly have 68mm shell width (easily measured) with English threading (1.370" 24tpi).
The World Sport has SR SXC-310 crankset with 170mm crank arms and 40/52T chainrings. The World has Sugino #5 crankset with 170mm crank arms and 40/52T chainrings. The SR 310 chainrings have 110mm BCD. The bolt pattern for the Sugino #5 chainrings isn't shown in the '87 Parts & Accessories catalog.
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