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Replacing front rings?

Discussion in 'Bicycle Mechanics and Repairs' started by Mister Paul, 10 Jun 2008.

  1. Mister Paul

    Mister Paul Honky

    Location:
    North Somerset
    I know it's generally accepted that when you change chains you change the cassette. But what about the front rings?

    I had a look at mine tonight and the middle ring cogs are slightly elongated, with the metal pushed to the side. There's no apparent effect on the pedalling though, although if you watch the (new) chain you can see that it doesn't fit into the drops as well as it should.

    When should you think about replacing front rings?
     
  2. Replace your chain more often and your chainrings will last *indefinitely*, as will your cassette. Had my chainrings on since 1995.
     
  3. gbb

    gbb Legendary Member

    Location:
    Peterborough
    There is no rule of thumb IMO.
    My Raleigh with an Ofmega chainset and Sora cassette had done circa 3 or 4000 miles on all the original equipment.
    I changed the chain and left the cassette and chainrings. It still works well, allthough there is some wear evident in the chainrings.
    The cassette looks absolutely fine.

    In your case MP, if you've done the chain AND cassette, i think i'd do the chainring as well. If its not sitting properly in the teeth, you're just going to shorten the life of the new chain.
     
  4. Smokin Joe

    Smokin Joe Legendary Member

    I'd only replace chainrings if the chain started slipping. Worn rings won't damage a chain, they are only made from aluminium.
     
  5. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    You will get away with chain ring wear much better than rear sprocket wear - unless they look like shark fins then keep them... Just on my 3rd set of chain rings on a 22 year old crank set - training bike !!!!
     
  6. byegad

    byegad Guru

    Location:
    NE England
    You need to replace the worn chain ring now, otherwise you will soon wear out the new chain.
     
  7. gbb

    gbb Legendary Member

    Location:
    Peterborough
    I guess it's down to how much you do, or dont want to, spend £15 (ish).

    Spend it and you will benefit.(but you may not even notice the difference)
    Dont... your chain wont last as long .(but you may not even notice the difference)

    There is no clear answer.
    Do you want to feel happy and spend £15.
    Do you want to feel unhappy, and spend £15.....

    The choice is yours. :biggrin:
     
  8. Smokin Joe

    Smokin Joe Legendary Member

    Rings are aluminium (soft). Chains are steel (hard).

    Worn rings won't wear the chain.
     
  9. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    When buying chainrings, do search about a bit.....

    Ribble are priced well with Stronglight's Dural and Zircal rings for road bikes - dural is 6000 series, zircal 7000 series alloy and better, but a good price and look well finished. The dural ones are fine - been using them on my training bike for years, but not as 'pretty'.

    Just got a really good MTB outer ring - 110 BCD from chainreaction - Blackspire 7075 alloy, ramped etc, and just £15....
     
  10. bonj2

    bonj2 Guest

    wouldn't it be better then to have an aluminium chain?
     
  11. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    Planet bonj.............;)
     
  12. Yorkshireman

    Yorkshireman New Member

    These are steel (and have got a lot of miles on them over the past 9 - 10 years)
    2008_0429TREK7000003.jpg
    and so are these
    2008_0429TREK7000001.jpg
    infact, in 60+ years of cycling I've not used aluminium rings yet ;).
     
  13. Smokin Joe

    Smokin Joe Legendary Member

    Luddite.
     
  14. Smokin Joe

    Smokin Joe Legendary Member

    ...or even tight fisted northener.
     
  15. Yorkshireman

    Yorkshireman New Member

    Aw c'mon :sad:. I'm trying - I removed this
    2008_0506Trek7000001.jpg
    and replaced it with these bits
    2008_0514TREK0001.jpg
    OK it's not really an Ahead set - but it looks like one (that's the Luddite bit dealt with) and it must have cost me all of £16.00 in parts + I fitted a new headset that cost another tenner (that's the tight arse bit sorted) ;).