High all-
My On One Carbon 29er has had front shifting issues from day 1. Front cranks are as stock from the original full bike pre-order offering from On-One earlier this year - FRM 2x10 (27/42 chainrings), as is the front derailleur (an SLX top-pull I believe).
Bike came with Shimano 10-speed rear shifter, derailleur and cassette - I switched out to SRAM X0 (front shifter is SRAM X0 as well).
Front shifting performance is atrocious - very often dropping from large chainring to small, chain-suck, and difficult to shift from small chainring to large. The chainline on the bike also feels off - huge chainline angle from large chainring to 2-3 largest cogs on rear, and even from small chainring to largest cogs on rear it appears to be at a significant angle.
So - anyone else purchase one of the original Carbon 29er full bike deals, and having (or not) similar problems with the stock FRM cranks and front shifting? I've had my bike shop look at it several times, they can't get it to work smoothy. They claim that there shouldn't be an issue with the XO front shifters and SLX front derailleur, and I tend to believe them but am willing to change out the front derailleur to SRAM.
Alternately, and more to my suspicion - is that the FRM cranks suck. I do recall hearing of other people having issues with frame clearance for other cranks - perhaps the FRMs have enough clearance, at expense of chainline?
Any thoughts, suggestions, constructive comments greatly appreciated.
--Kristan
Sounds like some of the problem could be down to cable tension
I'd try putting a bit more tension on it to make the change up easier and to stop it dropping off
Look at the mech stop too
From what you say, chainline could be the issue, can it be adjusted.
willing to change out the front derailleur to SRAM
SLX is a better front IMO, I swapped an x9 for an older XT front with x9 shifters the Shimano front is a class better. So I doubt that's where your problem is.
The Shim front works fine with my x9 shifters (all 3x9 though)
Cynic-al- Good question - don't think it can - the large s pretty close to the frame already. Apparently a somewhat known issue (I may be wrong) with Carbon 29er and its press-fit BB
Uplink- will check tension. Not sure that's it, as shop has checked several time - but I'm open to anything to fix the prob!
Apparently you can space the rear cassette out slightly, ,not tried myself. If it wasn't,t press fit I was going to suggest a k9 acs