front derailleur : best to get get a 34.9mm or 31.8/34.9mm

Discuss the eternal "Which fork/bike/tyres should I buy?" questions.
mungojerry31
Posts: 8
Joined: Fri Feb 12, 2010 10:07 am

front derailleur : best to get get a 34.9mm or 31.8/34.9mm

Postby mungojerry31 » Sat Dec 29, 2012 08:22 am

I have a 2008 Trek 6300 post size is 34.9MM I know both will work, but I didn't know if there was any advantage in using one size over the other. I'm looking to buy a Shimano XT M771 Conventional 9sp Front Mech. Thanks in advance for any help.

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njee20
Posts: 9491
Joined: Mon Nov 26, 2007 20:06 pm

Re: front derailleur : best to get get a 34.9mm or 31.8/34.9

Postby njee20 » Sat Dec 29, 2012 10:03 am

They're all 34.9, you can fit a shim to make it 31.8.

mungojerry31
Posts: 8
Joined: Fri Feb 12, 2010 10:07 am

Re: front derailleur : best to get get a 34.9mm or 31.8/34.9

Postby mungojerry31 » Sat Dec 29, 2012 15:27 pm

THanks! Figured that was the case but didn't want to order something and find out I would have been better off going with one over the other.


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