Shimano 105 10-s RD install issue?
Having a problem that I can't figure out, thought someone might save me a bunch of time. I installed an older 9-s 105 gruppo last week, that went pretty well.
Different bike, I'm installing the new 5700 105 10-s shifters, FD, RD.
Following the tech doc, I lined up the guide pulley with the smallest cog edge, then attached the cable. I shift in as far as I can go but the RD/pulleys only travel to around the 7th biggest cog. The next step is the adjust the inner limit but I'm not even close to the biggest cog.
Some info: 10-s SRAM cassette, it looks as if it doesn't require a 1mm spacer, so didn't use one. The cables, shifters, RD/FD are all new. I have the DT shift cam adjuster (this is the little metal flip arm with a few positions) turned all the way in, against the DT. I have the RD barrel adjuster opened just a bit, not bottomed out.
Haven't hooked up the FD cable yet, this shouldn't matter at this step, I don't think. Don't have the chain installed yet.
Without the cables connected the shifter seems to only have one shift in each direction. I thought a 105 shifter would/should be able to run through 10 clicks in each direction, even without a cable connected. Wonder if this shifting is different on the 5700? Also, the clicking w/o cable connected on the left feels weird, doesn't have the normal full click I'm used to that drops the chain to the inner ring. (It's a double up front).
I'll leave it at that to not muddy the waters more. I'm confused though...and I'm only on the third step. I've played with it for a bit, including the cable tension, making sure I'm all the way out to start with, etc.
Thanks for any ideas!
The only thing I have thought about:
1) B-limit screw. I have it almost all the way backed out, thought this was a good spot to begin with. Moving it still doesn't put the G-pulley anywhere near the biggest cog.
2) Installment of the RD. There is a (sort-of) washer part between under the body, around the install bolt. Maybe I don't need this on my frame? Or, maybe I don't have it oriented right? That would put the RD out further, which could/is the issue.
The shifter will have 9 clicks, not 10. You should always check that it's all the way in 'high gear' position before installing the cable. You may have to pull the brake lever in a bit and then look inside to see what's up. You should be able to get the cable out w/o too much trouble. Confirm it's in high gear position then put the cable in.
New derailleurs come out of the box w/ the limit screws in at least 1-2 gears too tight on both ends. You'll never get into the largest cogs unless you back that screw out a bunch. I always adjust the screw 'close' before installing the chain, then i can put the chain on and pedal the bike while fine tuning.
i work for some bike racers...
2013 Trek Madone 5.9 w/ '12 SRAM Red
2012 Trek Cronus Ultimate w/ SRAM Red Black
2010 Cervelo T1 sprint bike
2011 Cervelo P2 pursuit bike
FMF 24" cruiser
Bianchi Pista road fixed gear
1949 Columbia 26" cruiser w/ SRM & fenders...and rust
'05 Suzuki DRZ400SM
Per cxwrench it sounds like the shifter was not fully "shifted out" when you attached the cable. I'm betting that if you shift to the smallest cog and pull on the cable where it runs along the down tube, you can shift it a couple more times and then you'll find the cable is quite loose. Shifters often require a bit of pull on the cable to really function properly.
Originally Posted by nayr497
Thanks for the replies. I kept at it, took a few goes, but I was able to get all the gears, get the limit screws set, and also get my B-limit set pretty good.
Going to take it to the shop and let them have a look-over and fine tune it.
Also, after some adjusting, got the FD set. The issue with it was that the ST diameter required using a shim, which came with the 105 FD, but wasn't machined very well and thus made a clean, proper install difficult. It wanted to twist as you tightened the clamp collar bolt. Had to set it a bit higher than the 1-2mm but it is working as well.
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