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Old 05-08-08, 11:00 AM   #1
Little-Acorn
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Long-cage derailleur for 13-34 freewheel on older Schwinn?

I have a 1970s Schwinn Continental with a 14-28 rear cluster. (Front chainwheels are 52 tooth and 39 tooth). I'd like to put a 13-34 7-speed freewheel on it. I know I'll have to re-set the distance between the rear dropouts and get a longer axle and skewer.

I'll also need a new (or used) rear derailleur that can (a) pivot front-to-back enough to handle a shift from 52 front/34 rear to 39 front/13 rear while keeping tension on the chain, and (b) move right-to-left enough to cover all seven cogs on the freewheel.

Can anyone recommend a decent (hopefully cheap) rear derailleur that will handle both (a) and (b) above?

Thanks all!
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Old 05-08-08, 11:49 AM   #2
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Any current Shimano or SRAM long cage MTB derailleur should work fine. You can probably get one at the LBS for less than $20.
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Old 05-08-08, 12:19 PM   #3
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What kind of shifters are you using? I would stick with Shimano as you may not have enough cable pull for some SRAM MTB deraillers.
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Old 05-08-08, 01:13 PM   #4
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Quote:
Originally Posted by Little-Acorn View Post
I have a 1970s Schwinn Continental with a 14-28 rear cluster. (Front chainwheels are 52 tooth and 39 tooth). I'd like to put a 13-34 7-speed freewheel on it. I know I'll have to re-set the distance between the rear dropouts and get a longer axle and skewer.

I'll also need a new (or used) rear derailleur that can (a) pivot front-to-back enough to handle a shift from 52 front/34 rear to 39 front/13 rear while keeping tension on the chain, and (b) move right-to-left enough to cover all seven cogs on the freewheel.

Can anyone recommend a decent (hopefully cheap) rear derailleur that will handle both (a) and (b) above?

Thanks all!
I rebuilt a 1970 Continental about 6 months ago. It has an Atom/HurÍt RD that can be rebuilt pretty easily. If I recall correctly the hanger is a claw that seats in the dropout. You'll need to find a hanger along with an RD (some lower-grade components like Shimano Tourney use a claw). Unless the current RD is trashed, try using it. It might not have enough coverage (the cage length isn't an issue) but then, it might.
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