index gear question

Hi,
Before I do anything silly though I would ask here. So my bike gears now need indexing and I've always just done this turning the cap 1/4 turn at a time.
My issue appears to be with the large rear gear when in the big ring (I know I shouldn't use it and dont when out riding) , however it just doesn't want to go into it.
On the small ring it was clicking a bit, few turns (anti clockwise) on the cap and up it went. All is working well on the lower ring up and down. However back on the big ring and it simply won't go up to it.
Tried moving the derailer by hand and it does go up, but that does require me to give it a good push. Should I adjust the derailer limit screw and try and nudge it over a bit or is this a sign of something else that I need to look at? Don't want to start messing and making more issues that I need to.
Before I do anything silly though I would ask here. So my bike gears now need indexing and I've always just done this turning the cap 1/4 turn at a time.
My issue appears to be with the large rear gear when in the big ring (I know I shouldn't use it and dont when out riding) , however it just doesn't want to go into it.
On the small ring it was clicking a bit, few turns (anti clockwise) on the cap and up it went. All is working well on the lower ring up and down. However back on the big ring and it simply won't go up to it.
Tried moving the derailer by hand and it does go up, but that does require me to give it a good push. Should I adjust the derailer limit screw and try and nudge it over a bit or is this a sign of something else that I need to look at? Don't want to start messing and making more issues that I need to.
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Posts
Starting with the limit screw done properly from big ring. Go to you tube on how to do that.
If you still can't get perfect shifting then it is worth a look at your rear hanger. If it is bent it can also cause problems with shifting alignment causing weird shifting issues.
So the cross chaining isn't such a big issue as people make out. I never thought about it until seeing it on these forums then became scared as such of using those upper gears on the big ring.
I think the bike is bedding in as done about 500m on it now, hence the reason I suspect adjustments are needed.
Work your ratios out and youll see.
Not sure you will use the Big chain ring with the smallest ring at the back but they should shift in all gears without problem.
I use all my gears so not sure what's the advise given by some here.
Crossing the chain is not about the big/small combo but big/big. Stick it in there and have a look at the chain line...rotate the pedals and look at the chain coming off the teeth front and back...
The weakest point of a chain is the plates, which is exactly where a chain will break for those chaps who regularly ride big/big and then put the power down grinding up hill because they can't be bothered to change down. It isn't just an old wives tale as I have had to help those riders at the side of the road who have broken a chain and don't have a tool. Then factor in chain efficiency. ..not relevant for most of us but there is a reason why TT riders spend a lot of time fussing over the optimum gear and the line it will give.
Sure, some folks ride big/big all the time without an issue. ..it is all about risk assessment.
OP, get ya gears sorted. Big/big is not something you should be doing but the bike should be able to cope with it in case of inadvertently using it, night riding, etc.
I wasn't aiming or encouraging cross chainring. If anything I preach to use all gears and the most efficient gearing.
With the new gearing these days the cross charing problem is greatly reduced. Although not recommend by Shimano (an opinion from different manufacturer from this site done) but it shouldn't be that you can't use it at all if you want to.
In OPs case his gearing is not working at all in that range.
But my point is that whether you lazy or not your gear should all work. If not then get it fixed and one shouldn't be saying don't fix it because you shouldn't cross charinring.
I often find this problem is just down to the cables bedding in. Whenever I get a new bike, I'll routinely do what I mentioned after a couple of thousand miles.