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Clamp diameter for Schwinn Fastback F Der.?(6 posts)

Clamp diameter for Schwinn Fastback F Der.?dirtpoor
Jan 14, 2003 12:20 PM
The 2001 fastback has an oversized down tube and I'm not sure what clamp diameter I need for the front deraileur. Thanks for all your help. DP
re: Clamp diameter for Schwinn Fastback F Der.?Rusty Coggs
Jan 14, 2003 1:59 PM
Tried measuring it?
measure it?...C-40
Jan 14, 2003 2:05 PM
It's easy to measure the diameter of a tube if you have an adjustable wrench, often referred to as a Crescent wrench. Adjust the wrench to fit snugly on the tube and measure the jaw opening with a ruler. It will be 1-1/4 or 1-3/8".

Another method is to wrap a piece of masking tape around the tube. The length of the tape to go around the tube will be almost 4" for a 1-1/4" tube and 4-5/16" long if it's a 1-3/8".
Thank you.dirtpoor
Jan 14, 2003 3:12 PM
I was trying to place an order from work, so I did't have the frame handy. Thanks again for your help.
schwinn fastback info neededstevenlacob
Jun 8, 2003 3:00 PM
what was the final measurement for the front derailleur, I don't have any equipment to measure so please just give me the measurements, and what size diameter seat post do I need 27, 27.2 ?
Thanks Steven
Thank you.stevenlacob
Jun 9, 2003 3:10 PM
please give me your info, about your seat pole diameter and front derailleur size