In reply to LastBoyScout:
> Normally, I'd just replace the chain ring that's worn out, but I think the M311 is a rivetted unit, so you can't do that. You could use the opportunity to upgrade to one that you can replace, but that might involve a new BB and a sack more cash.
What's a BB? If it involves more cash then I think I'd rather not know.
Aha - just read next line... bottom bracket.
> Speaking of which, it may also be a good time to check/grease/replace the bottom bracket - depends if cartridge or cup and cone.
I don't know what type it is, but it's this
CH Square Taper - 68mm. If I'm taking the chainset off then I would probably check this as well.
> Definitely replace the cassette and chain - I tend to use Wippermann, but SRAM, KMC (currently on road bike) or Shimano will all be fine.
Great.
> Expensive bit will be the tools, if you haven't already got them.
Oh dear, ebay/amazon/Wiggle/Decathlon here I come.
> Edit in response to your edit - cassettes are pretty standard, so you can use Shimano or SRAM or any other 8-speed compatible brand.
Thanks again.
Cheers buddy, appreciated.