Worn chainring, or is it OK?
A couple of months ago I took my bike for a service at a bike shop. After 8000km, the chain was badly stretched and was replaced, as was the cassette cogset.
But they said the chainring was OK.
That has me puzzled. To me it looks pretty worse for wear and I am having doubts about the validity of their advice!
Is it really as bad as what I think it is? (see photo)
Tags: cassette, maintenance
Replies to This Discussion
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Permalink Reply by Ian Rawley on -
Peter, Can't say much from the picture although the teeth don't look hooked. The new chain is your best guide. If the chain ring is knacked then you will have problems such as chain suck etc. Dont be fooled by the mishapen teeth, they are made like this to help gear changes. 8000km is well within a chain ring's life so if it's not bent and runs OK with the new chain and cassette then it is OK. Use it for a while and see how it goes - if you have troubles, which is unlikely, then change it. The bike shop are doing you a favour, they could easily have sold you a new one and you'd have been none the wiser!
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Permalink Reply by JDL on -
Teeth will be pointy if it's worn too much.. Looks OK.. I'm sure your LBS would have tried to sell you one if they thought it was knackered..
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Permalink Reply by Roger ... on -
i've seen worse ... get a new one though if it will help you sleep
the crank teeth arent all the same even when new to help shifting.
more extreme still
The SRAM OG open glide system & Red cassettes even have missing & deformed teeth straight out the bag
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Permalink Reply by Richard on -
As others have said, modern chainrings look pretty ghastly when new, including sharp points and uneven shapes. I reckon yours is okay, particularly seeing the shop didn't try to sell you a new one.
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Permalink Reply by Peter Hill on -
thanks everyone for the re-assurance!
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Permalink Reply by Mike Brisco on -
Looks a bit worn, but if it rides OK, and gears change OK, why worry? Just thinking about "Bikes for refugees" - we see plenty with rings looking like yours - they road-test OK - so we don't change them. Most problems of wear we see are either chain, or cluster. If a front ring needs changing - usually because it is bent. Either gears dont change, or it moves from side to side inside the front derallieur cage, causing the chain to rub on the sides. Interesting, as I hadnt really given this much thought...
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