Does anyone know how to tell if your front gears need changing? When I am peddling now and then the chain slips. I cannot tell if it is slipping at the front or back but have a feeling it's at the front. I know nothing about bikes, I only ride.
Cheers
Front gears
Re: Front gears
Could be stacks of things. Usually the rear goes first . Well actually the chain wears first and this wears the rear before the front. I'll be cycial and guess that yoiu haven't checked the chain for wear or anything lately.
Unless the bike is near new I will guess that the chain is very worn, that will have worn the rear gears beyond any tolerances and a rear knackered chain could have worn the front as well.
You do't say how many chainrings you have (at the front) but a deraileur could be misalingned. Cables for bother ends coulkd be poorly adjusted, corroded or several other things. We really could do with a picture, taken from the chain side showing both front and rear sprockets and the chain.
Unless the bike is near new I will guess that the chain is very worn, that will have worn the rear gears beyond any tolerances and a rear knackered chain could have worn the front as well.
You do't say how many chainrings you have (at the front) but a deraileur could be misalingned. Cables for bother ends coulkd be poorly adjusted, corroded or several other things. We really could do with a picture, taken from the chain side showing both front and rear sprockets and the chain.
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Re: Front gears
It's likely that if the transmission has worn to the point of slipping that chain, cassette, jockey wheels, your most used chainring and possibly all the chainrings need replacement. In that order of likelihood.
That's *if* it's slipping due to wear. Misaligned gears can give similar symptoms.
Re: Front gears
Find a steep hill, put the bike in the small sprocket on the back, Set off from a standing start if the front chain ring is worn (either the big one or the small one) it will slip round with the chain jumping the teeth and you can see it because you won't be going that fast.
If it is jumping check the chain for ware as noted above.
If it is jumping check the chain for ware as noted above.
Cheers
J Bro
J Bro
Re: Front gears
Do you want to learn how to diagnose and fix this sort of fault? Or would you rather have someone else do it?
For the former there are two great resources in addition to this forum:
Sheldon Brown:
https://sheldonbrown.com
Park Tool Repair Help:
https://www.parktool.com/en-int/blog/repair-help
Jonathan
For the former there are two great resources in addition to this forum:
Sheldon Brown:
https://sheldonbrown.com
Park Tool Repair Help:
https://www.parktool.com/en-int/blog/repair-help
Jonathan
Re: Front gears
Worn chainrings tend to look like a "sharks fin". They normally last thousands of miles depending on how often you change the chain. As mentioned above it is more than likely that it is the back gears that are worn and likely to slip. Usually though it happens in the most used sprockets and not others.
Initially fit a new chain and see how you go on. Probably though new rear gears will be needed as well.
Example of worn rings:-
https://roadcyclinguk.com/how-to/mainte ... ain.html/2
On some chainrings you will find a few teeth that have a lower profile. These are meant to be like that and are that shape to aid the chain changing between rings,
Initially fit a new chain and see how you go on. Probably though new rear gears will be needed as well.
Example of worn rings:-
https://roadcyclinguk.com/how-to/mainte ... ain.html/2
On some chainrings you will find a few teeth that have a lower profile. These are meant to be like that and are that shape to aid the chain changing between rings,
You'll never know if you don't try it.
Re: Front gears
Thanks for the replies. I forgot to mention I measured the chain and it does not need replacing.