Bike Forums - View Single Post - Can Shimano 105 Med cage, 10speed handle a 13-34 cassette ?

08-08-17 | 11:14 AM

#7

rowebr

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From: Washington DC

Bikes: 1981 Bianchi Limited 650B conversion (sold), 1985(?) Guerciotti retro-roadie, 2018 Specialized Allez Sprint, 2012 Specialized Crux, mid 80's Focus MB-400

Quote:

Originally Posted by kcblair

Thank you. I don't see why it wouldn't work, too. I would never use the small-small. To clarify, the 105 (5700 RD), is a 10 speed, but I'm using it with a 7 speed cassette and shifters (DT). The B screw can be turned in another 7mm, so the 34T should clear the jockey wheel. I was wondering if anyone has done this.

Sounds like that 34T works with your 105 GS RD. I'm guessing you had to turn in the B screw some ??

THanks. KB

Sure thing. Yes, turning the B-screw in will push the upper pulley of the derailleur lower, hopefully you can turn it in just enough for the derailleur to clear the largest cog. If you haven't messed with the B-screw before, proceed carefully. Its a tiny screw that can be tough to turn, so take care not to mess up the head of the screw.

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