slipping chain...

dcurzon
dcurzon Posts: 290
edited September 2011 in Workshop
Just recently replaced chain and cassette, for the first 20 miles, all seemed well, but now i'm finding the chain slips when setting off/putting hard power down in the first 3 or 4 sprockets.

cassette WAS 11-25, have changed it to 12-25 (9 speed, shimano cassette)
chain has been replaced with Shimano chain, with a quicklink fitted instead of the rivet.

gear indexing is all fine. Note, i didnt change the cranks, which are a triple. I spend most of life in the middle ring (39). This morning, as an experiment, i did a lot of pulling away using the small chainwheel, and didnt experience slipping.

Time to change the crankset too?
B'Twin Sport 1
FCN 7 =4, +2(non cycling clothes) +1(beard)

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,335
    Whatever it is, it's not the crankset.
    left the forum March 2023
  • keef66
    keef66 Posts: 13,123
    You missed the spacer out when fitting the new cassette? (is it stuck to the back of the old one)

    Is the new chain definitely 9 speed?

    Unless your chainring is very worn (ie visibly shark finned teeth) I doubt it's the cause. If it is, you need only replace that ring.
  • dcurzon
    dcurzon Posts: 290
    the middle (39) chainring has teeth that look like piranha teeth, ie, sharp, thin, pointy. Have improvised for now by using the 30 and 50t rings and all works smoothly in those. As the chainset is super cheap budgety thing anyway, i'll replace the chainset for a double.

    ta
    B'Twin Sport 1
    FCN 7 =4, +2(non cycling clothes) +1(beard)
  • dcurzon
    dcurzon Posts: 290
    replaced uber budget chainset with Tiagra double (plus BB), also fitted Duraace FD. All good again :)
    B'Twin Sport 1
    FCN 7 =4, +2(non cycling clothes) +1(beard)
  • keef66
    keef66 Posts: 13,123
    I do like a happy ending!

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