I have an old (~2007) Genesis Core 30 hardtail which has recently started to suffer from really bad chain skipping every time I put it under load. It seems independent of which gear it's in (it's an old 3 x 9 format). Most of the gear is Deore.
I've looked around on Google and narrowed it down to the chain, or the cassette , the chainrings or maybe the hub. i.e. just about anything. The rear mech also looks a little twisted and the jockey wheels are very worn, with a couple almost completely missing. I can't adjust the L screw enough to stop it crashing into the spokes so it probably needs replacing anyway.
I've replaced the chain and it made no difference, does anybody have any suggestions ?
I'm a bit reluctant to start throwing parts at it, especially if I end up replacing the entire drivetrain. Rather than doing this I'd rather just upgrade it to either 3x10 or maybe 1x11, as the only additional expense as I see it would be the shifters.
Any suggestions anyone ? If I end up swapping parts out, then I'd like to do it in a way that, if possible, I end up with an upgraded bike (for instance can I swap the rear mech for a 10 speed mech ? Will it work on a 9 speed cassette with 9 speed shifters ?
My plan would be something like :
Rear mech (-> 10 speed).
Cassette (->10 speed)
Chainrings
Shifters
Would this work ?