Thread: Front derailleur clamp diameter
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Old 01-18-08 | 08:16 AM
  #3  
HillRider
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Joined: Aug 2005
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From: Pittsburgh, PA

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Your current derailleur should have the diameter stamped on the inside of the clamp or the braze-on adapter clamp. BTW, 31.8 mm is 1-1/4" and 35 mm (actually 34.9) is 1-3/8" so measuring with a ruler or calipers should be fairly simple.
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