Rear chain slip - I think the cassette has had it

ukcraigb

Hi all,
Taking my bike into the LBS as I'm getting a lot of rear chain slip when trying to ride hide (nearly been over the bars a couple of times!).
I took a look at the rear cassette and I think its had it.
Can anyone recommend a decent cassette for around £50?
I currently have a Shimano Deore 9 speed cassette, believe its this one: http://freewheel.interalpha.net/product ... asp?id=399

Any advice greatfuly recieved!

nicklouse

just get the same, as if it is that worn you will need a new chain.

get the lbs to look and get back to you.

Ticaboy

For £50, you'd get top flight SRAM or XT. Looking on Merlin's website, they're doing Deore 9 sp + chain for just over £20. XT with Chain £40. Or SRAM PG970 cassette + PC 971 chain for £30.

ukcraigb

Thanks for that - much appreciated.

Just out of noobie intrest, why do you need a new chain as well? Do they tend to wear down at the same speed?

Also, how difficult is it to fit a new cassete? I might have a go at it myself depending on how much he is going to charge!

nicklouse

Yes they wear togther. but it might not be a chain cassette problem. IS the chain slipping? or is it the freebody?

to change a cassette is easy IF you have the correct tools.

read parktools.

ukcraigb

Haha, knew the park tools link would come up!!!
I think its the chain, on the road its fine but when trying to climb step single track and I'm putting a lot of force down the gears sometimes jump, because this only happens when I'm really putting a lot of force down I suspected it is the freewheel causing the chain to slip out of gear.

Could it be the cables?

Ticaboy

Sounds like worn components rather than cables. The extra pressure required when climbing just means it takes the cassette/chain over it's "grip". threshold. Generally, chains and cassettes wear at similar rates (if similar quality components are matched), so good idea to replace both (hence when Merlin etc do deals on cassettes and chain bundles).

You'll need a lock-ring removing tool and a chain whip to counter the effects of turning the lock-ring the same way as the freehub rotates when replacing cassette. Freehub removing tool for freehub funnily enough.

ukcraigb

That makes sence.
If the free wheel and chain wear at about the same speed what about the chainset (which BTW seems to be working fine!)

nicklouse

ukcraigb wrote:

That makes sence.
If the free wheel and chain wear at about the same speed what about the chainset (which BTW seems to be working fine!)

there is no freewheel. But there is a free body.(clicky bit) and a cassette. and then the chain.

sorry pedant but things are different and have different solutions.

ukcraigb

nicklouse wrote:

ukcraigb wrote:

That makes sence.
If the free wheel and chain wear at about the same speed what about the chainset (which BTW seems to be working fine!)

there is no freewheel. But there is a free body.(clicky bit) and a cassette. and then the chain.

sorry pedant but things are different and have different solutions.

Not at all, its all a learning process and I appreciate your time and advice!

Ticaboy

The cassette slides onto/sits on the freehub.

I've just changes my cassette and chain, but front chain rings were still fine so have not changed those yet. Had this confirmed by LBS just to be sure.