Gears skipping

antop34

Everytime I pedal hard my gears tend to skip. At first I thought this was due to the cranks etc, but I have upgraded to some new hollowtech ones and these are rock solid. Does anyone know what the issue could be? as my shins are suffering from my pedals spinning round!

blazo

Hey mate, try testing your chain with a wear guage - this will tell you how worn it is. Basically if you've got an old chain on new sprockets or a new chain on old sprokets the spacings will not match each other and you'll get skipping. When you got your hollowtech crankset you should have bought a new chain and rear cassette. Then you keep an eye on your chain using the wear guage - when it gets more than 75% worn get a new chain. It sounds a bit wasteful but this is the only way to preserve your rings asthey wear slower than the chain.

antop34

Havent had that advise before, seems quite a good idea. Cheers mate

clarkson

when you replace your rings you dont need to change your chain or cassette. and when you replace them you dont need to change your rings. i dont and they're still fine. just get a new chain and cassette.

I said hit the brakes not the tree!!
My GT
http://www.pinkbike.com/photo/1315543/

blazo

A worn chain will wear out the rings and sprockets quickly. When your big ring is worn it doesn't tend to make your chain skip as there are alot more teeth to hold the chain on - but its still worn and will wear out a new chain - its when the cassette sprockets are worn that you notice it - Usually after putting a new chain on because before the two were previously wearing together.

If you buy a brand new set of rings as expensive as the hollowtech and dont replace the worn chain then it will wear out the rings alot quicker. As I say the best thing to do is buy a chain checker for about œ7 the park one is ideal. http://www.chainreactioncycles.com/Mode ... delID=5784

Drfabulous0

I find that on may cassettes usually last 2 chains, and my ring lasts 2 cassettes, although my wife has a three ring setup and the middle ring needs changing with every cassette. I always change things together and would never change a ring or cassette without fitting a new chain, but the chain can be changed on its own.
The slipping gears sound like a new chain and cassette would fix it but could be caused by other things, do you gears change properly?

<center><font color="red"><b>My Scott</b></font id="red"></center>

antop34

The gears change without any problems, I know the chain is getting pretty old, and the cassette has been on there for years, probably about time for me to just dig deeper into my pockets and get some more new stuff! (what a shame!!!)

clarkson

yep, spound like a new chain and cassette job. i havent changed my rings yet and i change my chain and cassette about once a year.

I said hit the brakes not the tree!!
My GT
http://www.pinkbike.com/photo/1315543/

dhutch

I dont have a chain-wear-gauge, if i messure it with a tape how long should i let it get before its time to replace?

dave_s

It's probably chain/cassette worn.
Unless you've got Shimano chainset with it's standard Dairylea chainrings that is.
Gear slipping is usually chain/cassette if you've made sure your gears are indexed properly and your chain is degreased/lubed first and it still does it