Mountain Bike Forums

I have an Airbourne Lucky Strike titanium frame, Shimano XT Chainset with 40 and 48 tooth chainrings, a Shimano 9speed close mech back cassette ( 12-21) and a brand new SRAM chain. The chainrings and cassette are both within 4 months old.

I changed my chain recently, and now when I ride hard, like pulling away, my chain seems to jump a cog - it goes BANG then TING and the pedals jump a tad.

It’s extremely offputting, I like to ride hard and feel safe when I do.

I’ve aligned the back derailleur as much as I can to be spot on.

Can anyone shed any light on why this is happening and what I can do to stop it. I’m sure it’s happened before and stopped of it’s own accord - is it just the chain wearing in?

Also, when riding over a bumpy surface my bike seems to rattle but I cannot for the life of me work out what it is.

I get really annoyed when my bike makes noises, I am so used to it being silent.

Any advice greatly appreciated.

James

The sprockets on the cassette may be worn to match your old chain, thus you might need to buy a new cassette.

And / or your chainwheels - especially the middle one. This is easier to see as you can easily spot if the teeth are hooked rather than neatly shaped.

Thanks for your reply, I changed them not so long ago, like mid december, and although I do about 75 miles a week I didn’t feel they were ready for a change yet. I do this every 9 months usually.

I changed the chain because it was making noise.

I took apart the cassette today and noticed a bit of movement, in the seating of the cassette itself, also the thing on the hub that it sits onto. I am quite concerned about the latter - is there anything I can do about that or is it normal? I usually do all my maintenance myself.

Maybe, but that would be a separate problem.

Decent tackle should last for ages at 75m per week.

not unusal riding on gritstone in winter to get through a cassette in four months.