Chain/Chainring/Cassette worn???

G1032

Hi

Can someone please tell me if both the chainring and cassette need to be replaced here. Can one tell from the photos provided whether or not they are worn? The chainring seems to have very sharp 'spikes'

The chain is obviously badly worn according to the chain stretch tool. The chain also skips quite badly. I have a new chain and cassette ready to put on.

Do I just replace the chain first and see if I get any skipping or do I put on the cassette as well as the chain? If I get no skipping with both new components do I leave the chainring well enough alone??

Thanks
G1032

Alek

I'd replace the chain straight away. Cassette is fine, chainring slightly less so but will last for a while.

If you keep replacing the chain when it reaches 0,75% stretch, chainring and cassette will last and last.

G1032

Alek wrote: »

I'd replace the chain straight away. Cassette is fine, chainring slightly less so but will last for a while.

If you keep replacing the chain when it reaches 0,75% stretch, chainring and cassette will last and last.

That's great. I have a cassette bought but it won't go to waste.
I'll replace the chain tomorrow and see how it is after.
How would I know if the chainring is worn to point of replacement?

07Lapierre

G1032 wrote: »

That's great. I have a cassette bought but it won't go to waste.
I'll replace the chain tomorrow and see how it is after.
How would I know if the chainring is worn to point of replacement?

I've a chainset that's seven years old and still going (average 10,000k per year)

I doubt you need a new chainset.

As Alek says, replace the chain regularly and you should only have to replace the cassette for every two or three chains and the chai rings should last a lifetime.

ford2600

How does that chainring look to you Alex?

07Lapierre

Good article here about chain and chainring wear..

https://www.google.ie/url?sa=i&rct=j&q=worn+chainring+picture&source=images&cd=&ved=0CAMQjxw&url=http%3A%2F%2Fcyclingtips.com.au%2F2009%2F03%2Fhow-to-check-for-chain-wear%2F&ei=-Fz_VJvPFKSO7AakvYCQBQ&bvm=bv.87611401,d.ZGU&psig=AFQjCNF6ghBBPN6FJqC31NGwhJCRU7XBbw&ust=1426107998770093