Tried fixing an issue on my sons roadie gears, they seem to go down the cassette fine but won't quite go back up without a second click 😭 I've done the hanger alignment, checked and lubed cable, checked cable clamp but no amount of adjusting will get them to work properly, shifter and mech are both 4600 series. Chain is kmc 10sp, could a new chain & cassette be the answer or am I wasting my time 🙁
Have you checked that the cable isn't frayed at the shifter end? (Probably worth changing it anyway - the inner, at least.)
The cable would be my prime suspect, new Shimano SP41 outer, and a good quality 1.1mm slick stainless inner will probably help matters no end. Economising by just fitting an inner, or using cheap parts will usually end with you back in the same boat.
Haven't checked the shifter end for frays & will do later thanks but always use sp41 & shimano stainless inner, so shouldn't be that - plus the issue is shifting up the cassette small to big teeth rather than down 🤔
Had trouble also when installing a set not long ago. It was the cable path / routing that was slightly off, and a realignment fixed the same issue (i.e. up the cassette).
Definitely worth checking the shifter end for splits, frays and movement from age / wear.
Good luck. They are pesky things and can’t wait to upgrade them in future.
There's nothing wrong with tiagra gears so it's a set up /spec issue rather than just poor design.-its not Sram.
Photo of the clamp bolt cable routing before you check for fraying at cable head.
Often folk either wrap them round or go the wrong side of the bolt or under the tang.....Al of which adjust the leverage Nd **** the shifting
Have you definitely got the cable routed correctly into the rear mech bolt? Can be easy to route it to the wrong side. Otherwise it sounds like an indexing/set up issue.
If it’s a new inner, check the B screw and that the cassette is correctly installed with the spacers done properly, and the wheel is in correctly.
There’s only a few things it can be so look for the really obvious stuff.
I'll have to do photos of the clamp later , as he's out strava bashing right now 😬 but I'm pretty sure I have it right as I still run 9sp rapid rise on my bikes 🤔
If you've clamped it wrongly, your shifting will be out in both directions, i'd still say it's cable related though, excess friction in there somewhere. The frayed end in the shifter is a good call, and best checked sooner than later (you'll know that sinking feeling as somebody hands you a bike with frayed ends hanging out of the outer cable if you've ever been tasked with removing the mangled remnants from the shifter).
Cable outer. Last one before the RD is the usual suspect. It fills with grit. Remove and replace with a new one. Check the plastic ferules aren’t kinked too. Had this many times. It’s now the first place I check. Very frustrating.
It won’t be the shifters.
If the problem is going up the cassette, i.e. small to big then it's a combination of shifter / indexing being out as in this direction the shifter is pulling cable. As you're needing 2 clicks to move to the first sprocket it sounds like you're starting with too much slack in the cable. If there's a problem with going the other way i.e. big to small, then it's almost entirely down to friction e.g. fraying / corroded inner knackered or kinked outer.
Most likely cable as above, tho mech wear and other causes in set up are possible.
Did they work and stop working or is the first time they have been set up
4600 is the older stuff. Are they used? Check the top jockey still floats nicely from side to side
Is it all 4600? Shimano played a mean trick. 4700 is a different pull ratio. The same as the 11 speed stuff. So if your mixing the 2 it won't work
Yeah it's all 4600 - I built it up for him with a new groupset & he disappeared off to uni for 3yrs & didn't use it much, only just now reported gears were not great. I'll take another look at it tomorrow. Thanks for all the suggestions.
Yeah, fixed it 👍 took all the cables off, trimmed both ends of the outer at the lever end, got rid of rubber waterproof gaiter on outer at mech end, replaced outer at mech end and made sure inner cable was clamped in exactly the right position. Success & he went and did his longest ride ever yesterday, at 25 I think he's finally caught the bug 😀
at 25 I think he’s finally caught the bug
Some of us are late bloomers!