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I have a 2009 Trek EX8 that came fitted with a nice SLX chainset and have just noticed that after 600 miles all of the teeth are dead apart from the odd 2 or 3 on each ring.
I tend to be a slogger rather than a spinner so dont really use middle ring as much as big but was surprised to see teeth missing all over.
Has anyone else experienced this? Is this poor quality rings or is 600 a good distance to cover on a set of shimano rings?
I have a Truvativ Comp-G chainset on my Giant that has done 1500 miles and they are near perfect with no teeth missing.
Any idea what rings will last longer that will fit as they need to be replaced?
Shimano SLX M660 44/32/22
cheers
You do know that some teeth are missing in order to aid shifting? Chainsets normally wear by hooking the teeth rather that just wearing them away. I'd expect thousands of miles from a chainset
I didnt know that. Should I be looking for some form of pattern in the teeth?
Have a close look, you'll see a series of pins and cut outs on the inside faces of the outer and middle rings, that'll be where the lower profile teeth are, only the inner is just stamped out.
I see what you mean as there a profile grooves on the inner rings, but I still have a few teeth side by side that are really only half a tooth.
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This a well worn chain ring. Notice how the teeth are wave shaped? Rings are worn down like this by the rollers of chains. Is this what your's look like?
Vary similar, but to that extreme
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The SLX mid ring is a steel/composite ring, the shifting teeth should correspond to the black composite ramps on the body of the chainring. This means that you should see the cut down teeth at roughly the same position with respect to the composite bits all the way round the ring.
Hope this helps.
EDIT - and you can replace the rings when they wear out with Deore rings as they're fully compatible, last ages and are a good deal cheaper.
Are you having any problems with shifting or the chain slipping?
Very occasional slipping (twice a ride) and the odd missfire.
Nowt wrong with those rings, miles and miles left in them
Sweet cheers, must be a missfire from the XT Shadow rear mech.
On some of the Fuels ive seen the last section of outer casing to the mech has been to short...giving the occaisional indexing problem.