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· Riding towards Delmarva.
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Discussion Starter · #1 ·
I have a new braze-on front derailler I'd like to use with my Soma, which has a 1 1/8 seat tube, yet the two Shimano braze-on adapters I've found are listed as 1 3/8 or 1 1/4.

Which one do I use for my 1 1/8 seat tube? I'm thinking the smaller 1 1/4?
 

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