How many miles before changing chain and Cassette?

Discussion in 'Bicycle Mechanics and Repairs' started by MBosh, 12 Aug 2019.

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  1. MBosh

    MBosh Regular

    I did about 700 miles on a chain and found it needed replacing. The guy at Halfords told me that the cassette would need replacing on the 3rd chain change. So does this mean the cassette would need changing every 2100 miles? I'm also curious as to why my chain is wearing out at 700 miles on my Road Bike. I've read that some people are getting 9000 miles out of their chains?

    Here is the spec of my Bike. Do you think 700 miles for a chain to wear is about right and should I change the cassette every 2100 miles?

    Frame ALUXX -Grade Aluminum
    Fork Advanced-Grade Composite, ALUXX OverDrive Steerer
    Shock N/A
    Handlebar Giant Connect
    Stem Giant Sport, ±6 degree rise
    Seatpost Giant Sport 30.9mm
    Saddle Giant Performance Road
    Shifters Shimano Claris 16 speed
    Front Derailleur Shimano Claris
    Rear Derailleur Shimano Claris
    Brakes Tektro TK-R312 Giant Specific, Dual Pivot
    Brake Levers Shimano Claris
    Cassette SRAM PG 850 11-32
    Chain KMC Z7
    Crankset FSA Tempo, 34/50
    Bottom Bracket Sealed Cartridge
    Rims Giant S-R2
    Hubs Giant Tracker Sport Road
    Spokes Stainless Steel
    Tyres Giant S-R4, Flat Guard, front and rear specific, 700x25mm
     
  2. Spiderweb

    Spiderweb Not So Special One

    Location:
    North Yorkshire
    Your chain requires cleaning and lubing, do this regularly and your chain will last much longer. 700 miles from a decent KMC chain is really poor.
     
    raleighnut and MBosh like this.
  3. slowmotion

    slowmotion Quite dreadful

    Location:
    lost somewhere
    I measure how much the chain has stretched with a chain wear tool, and chuck it when the wear is greater than 0.5%. After three chucked chains, I change the cassette. I'm not an aggressive rider and I tend to ride on tarmac. A chain lasts about 3-4 thousand miles for me. Other people will have different experiences but 700 miles seems wrong.
     
    MBosh likes this.
  4. OP
    OP
    MBosh

    MBosh Regular

    How often do you lube your chain? I clean and lube my chain once a month atm. Also, is 2100 miles about right before a cassette change?
    I use the chain tool and it shows it was worn at 700 miles.
     
  5. slowmotion

    slowmotion Quite dreadful

    Location:
    lost somewhere
    I'm afraid I'm a bit of a slob as regards cleaning. I lube the chain when it looks manky! If you ride on tarmac, I would think that you should get a lot more than a couple of thousand miles out of a cassette.

    Just my personal opinion.....
     
    raleighnut and MBosh like this.
  6. Spiderweb

    Spiderweb Not So Special One

    Location:
    North Yorkshire
    Depends how much I’m riding but I probably Lube every 12-14 days but wipe the chain with a dry cloth in between the lubes at least once.
    Your chain should be lasting much longer than 700 miles, one of my cassettes (SRAM) has clocked up in excess of 10,000 miles and the drivetrain is still running perfectly.
     
    Last edited: 12 Aug 2019
    MBosh likes this.
  7. slowmotion

    slowmotion Quite dreadful

    Location:
    lost somewhere
    :eek: I really am a slob!
     
    MBosh likes this.
  8. OP
    OP
    MBosh

    MBosh Regular

    @Spiderweb - How many miles do you think I should get out of a chain and cassette?
     
  9. Salty seadog

    Salty seadog Space Cadet...(3rd Class...)

    Ha...... And...... Ha.
     
  10. Spiderweb

    Spiderweb Not So Special One

    Location:
    North Yorkshire
    Really look after your chain and you should easily see 3-4000 miles and well in excess of 10,000 miles per cassette, don’t forget to clean your cassette too.
    Dust and crud act like a grinding past which will wear your chain prematurely. Why not get into the habit of wiping and lubing weekly, be meticulous, make sure you blob a bit of lube on each roller, leave for 10 minutes or so, spin the crank a few times and wipe off the excess. It really takes no time at all.
     
    Last edited: 12 Aug 2019
  11. OP
    OP
    MBosh

    MBosh Regular

    Yes, I think I'll do that lube it once a week. I cant understand Halfords telling me to change my cassette at every 3rd chain though, or maybe they don't realise I only got 700 miles out of my chain. If the chain has worn at 700 miles like mine has does that affect the cassette too?
     
    Last edited: 12 Aug 2019
  12. DCBassman

    DCBassman Veteran

    Location:
    Tavistock
    How's about a well-focused close-up of the cassette teeth?
     
    GuyBoden likes this.
  13. kapelmuur

    kapelmuur Über Member

    Location:
    Timperley
    I have over 3,000 miles on my current chain & cassette and both are in good condition.
     
  14. I like Skol

    I like Skol Hold my beer and watch this....

    Location:
    Ashton-under-Lyne
    I'm not meticulous about chain maintenance but do make sure it is never dry. Commuting in all conditions and typically get about 1500 miles per chain and normally 2 chains per cassette. It always amazes me when people claim chain lives of many times this and makes me think the riders either have really low power output or an unrealistic chain hygiene program? Life is too short to spend prolonged periods of time cleaning a chain. I feel my wear rate strikes a happy medium between utter neglect and anal obsession.

    However, not all chains are equal. I did have an OEM factory fitted chain that wore beyond the 0.75% mark within 400 miles! The next chain fitted to the same bike lasted the expected 1.5k
     
    ChrisEyles, Pat "5mph" and gbb like this.
  15. Spiderweb

    Spiderweb Not So Special One

    Location:
    North Yorkshire
    It is quite common practice to change the cassette every third chain, I don’t follow this, If the drivetrain is running smoothly then I’ll leave my cassette well alone.
     
    GuyBoden and raleighnut like this.
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