Originally Posted by
gsa103
34t cog is too large for a 105 RD. Your frame is fine, you're using the rear derailleur well outside its limits. It can be made to work, but the fault lies with user not with the manufacturer.
Actually, the B Screw did not make contact with the frame with the original 11-30 cassette installed, but that is what the bike came with from Jamis. Yes, even the one used by Jamis is outside the 28t limits for the 105 RD. I know it is outside Shimano's recommendations, but you do not offer a suggestion for a work around. Thanks for your time.