chain change well overdue, damaged chainrings/jockey wheels?

ben-----
ben----- Posts: 573
edited December 2013 in Workshop
Hello,

I've been silly. I've neglected for many many many years to change my chain. I came to change it today and having taken it off I then noticed the state of the cassette. One of the cogs doesn't have any teeth as such, they're spikes now. So temporarily I've managed to put the chain back together - to avoid knackering the new chain. I've ordered a new cassette. The question is do I need to get new jockey wheels? And do I need to get new chain rings?

piccies of jockey wheels:

http://www.hdbatik.co.uk/bikepics/1.jpg
http://www.hdbatik.co.uk/bikepics/2.jpg
http://www.hdbatik.co.uk/bikepics/3.jpg
http://www.hdbatik.co.uk/bikepics/4.jpg
http://www.hdbatik.co.uk/bikepics/5.jpg
http://www.hdbatik.co.uk/bikepics/6.jpg


chainring pics:

http://www.hdbatik.co.uk/bikepics/a.jpg
http://www.hdbatik.co.uk/bikepics/b.jpg
http://www.hdbatik.co.uk/bikepics/c.jpg
http://www.hdbatik.co.uk/bikepics/d.jpg
http://www.hdbatik.co.uk/bikepics/e.jpg
http://www.hdbatik.co.uk/bikepics/f.jpg
http://www.hdbatik.co.uk/bikepics/g.jpg

(sorry, last two need copying and pasting - 11 urls are the max apparently)

Obviously I'm not super fussy about this, but it's a question of possible further damage?

Thanks.

Comments

  • imposter2.0
    imposter2.0 Posts: 12,028
    There's no major wear issues in any of those pics - although it does look as though you spend more time on the inner ring than the outer. No cassette pics, but on the strength of those, I would question if there is anything wrong with the cassette either..
  • ben-----
    ben----- Posts: 573
    > There's no major wear issues in any of those pics

    Oh good.

    > although it does look as though you spend more time on the inner ring than the outer

    Yup, that's true.

    > No cassette pics, but on the strength of those, I would question if there is anything wrong with the cassette either..

    One cog doesn't have any horizontal flatness on any of the teeth. They're all spikes, not teeth. Really sharp. Seriously, it is definitely buggered.
  • imposter2.0
    imposter2.0 Posts: 12,028
    Fair enough. However, excessive wear to a single sprocket suggests that all is not right with your gear choices, IMO...
  • ben-----
    ben----- Posts: 573
    Yup I'm sure you're right. Ok thanks.
  • keef66
    keef66 Posts: 13,123
    I'd say the inner ring could need replacing; it's showing signs of shark fins in places. there's a possibility a new chain will skip under load.

    Fit the new chain and cassette and try a hill start in the small chainring...
  • Bordersroadie
    Bordersroadie Posts: 1,052
    It looks like an old Campag chainset (42-52) so my first port of call would be to buy a cheap used chainring from retrobike.co.uk, there'll be plenty out there at low cost as long as you avoid the high end Campag stuff like Record.

    Same with the cassette/freewheel, although we don't know the vintage of these?

    An alternative for the chainring is to get a cheap new non-Campag one (eg Stronglight from Spa Cycles) of the right BCD (bolt circle diameter).
  • ben-----
    ben----- Posts: 573
    OK thanks very much for pointing that out.

    > It looks like an old Campag chainset (42-52)

    Yup, it is.

    > Same with the cassette/freewheel, although we don't know the vintage of these?

    The freewheel is a Shimano one, Hyperglide. I think the bike was new in mid-late 90s (I bought it 2nd hand). I've already ordered a new freewheel replacement from Chain Reaction Cycles who are doing them for 1/2 price at the moment, which is nice.

    The new cassette should arrive tomorrow so I'll put it and the new chain on and see how it is.

    I was wondering about the inner chain ring. I think I'll look out for one for cheap.

    Great, thanks for that info.

    I cycled about 25 miles this morning and the chain didn't break. I was amazed I managed to get the pin back in.
  • k-dog
    k-dog Posts: 1,652
    Jockey wheels definitely don't matter - the chain isn't under tension on them so they don't contribute to slipping (if you think about it your chain is only pulling in the cassette and chainring - it's essentially slack underneath with the RD keeping it tight).

    I'm with the others on the smaller chainring - looks a bit worn to me. It's not so critical as the chain is spread across more teeth but if they're cheap it would be nice to replace the rings at the same time as everything else.
    I'm left handed, if that matters.
  • desweller
    desweller Posts: 5,175
    What you'll get with a new chain and worn chainrings is not skipping but chain suck. So deffo worth replacing the chainring; chainsuck is much more irritating than skipping.
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  • ben-----
    ben----- Posts: 573
    I'm going to look out for a cheap small chainring. Great, thanks for the info all.

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