Chain skips

[davidgiant]

Less than 100 miles ago i had the chain and rear cogset replaced (shimano Sora) and I am now finding the chain sometimes skips as if there were missing teeth. this skip happens when I stand up to push uphill or leave from a stop. this occurs only when i use the lower two rings at the front. any ideas what is happening?

[JonB]

possibly worn chainrings. Are they beginning to resemble shark's teeth? If so, bin them and get some new ones.

[buzz]

If you did replace the cassette as well, it is hard to tell what it happening. Was it a new cogset?

[trevgbb]

new chains don't like old teeth, as Jonb says, you probably need to replace the rings also.

[davidgiant]

(05-28-2010, 07:54 PM)trevgbb Wrote:  new chains don't like old teeth, as Jonb says, you probably need to replace the rings also.

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thanks to everbody-i checked my front rings and yes they are quite hooked-thanks for all your hints