8 speed cassette with 10 speed chain set

mmorty

I have a road bike with a Shimano Dura Ace 8 speed cassette with a Shimano 105 10 speed chain set - and as a result causes chain rub on the 3 smallest rings when on smallest front ring. Are there any solutions to stop the chain rubbing that won't mean changing anything expensive?

I have read elsewhere that a 9 speed chain might help a bit?

Any ideas gratefully received!

t5nel

I'm not sure specifically how much of this is caused by incompatiblity but you will always get some degree of rub and noise when you are pushing the chain over like this. IS the noise being caused by the chain rubbing the front mech?

Of course you need to make sure the front mech is properly adjusted but no doubt you know this.

Basic tips I have gleaned

1) You should try and avoid this as it is hard on the components AND less efficient to have the chain running at an angle.

2)If you must run these gears and if you have 105/Ultegra shifters you can 'trim' the front mech to reduce/eliminate the rubbing. You do this by pushing the front lever 1 click as though you were going to move to the big chain ring but not going quite far enough...this should move the front mech. You can alsom trim the other way for the opposite situation.

Here's a link I found...

http://www.livestrong.com/article/366428-how-to-use-the-trimmer-on-the-shimano-105/

Tim[/url]

desweller

You don't have to run such extreme chainlines. The chainrings are selected so that there is some degree of overlap; you should shift up to the next biggest chainring instead.

mmorty

Thanks for the advice

The chain is not rubbing on the Mech - it is rubbing on the front ring - more than you would expect. I agree that you shouldn't use these gears as changing up to the largest ring will solve this. I have just been advised by LBS that a 10 speed chain should be fine and reduce the rubbing, should I find myself in those gears...

ChrisSA

A 10 speed chain may get stuck between the sprockets at the rear.

It sounds like your chainset is a compact - I had the same issue with a 7 speed cluster. The 34T chainring is so small that in extreme chainlines it rubs on the outer chainring.

desweller

Maybe your chainline is incorrect (unless you just have super-short chainstays). I'm not familiar with the Shimano stuff chainsets, but might get some mileage from putting some sort of spacer between the spider and the bearing.

Cretan Steve

Hi, I had the same problem with an 8 speed cassette/9speed chainring set up, and cured it by fitting a nine speed chain. Hopefully same applies to the 8/10.

unixnerd

I'm running a ten speed Dura-Ace triple with a 9 speed 105 cassette and chain, it all works fine.