Classic & Vintage - BB size on an 87 Schwinn World?

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.

PDA

View Full Version : BB size on an 87 Schwinn World?

sibaudio

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.

Thanks

Scooper

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.