Cassette help needed

[DooDah]

I am thinking of changing the cassette on my winter bike to make the steep hills near me more manageable. I have Sora 9 speed and 12-26T or 11-26t (I can't remember off hand). I was looking for 28t but I can only find a 30T cheap at CRC. I am fine with this, but will my rear derailleur cope with it and will I have to buy a new chain as well?

 

[alecstilleyedye]

depends on the rear mech; long arm will, short arm won't. changing the chain and cassette together is always recommended…

 

[DooDah]

depends on the rear mech; long arm will, short arm won't. changing the chain and cassette together is always recommended…

Ah OK, how do I know the rear mech length? Current chain is pretty new so I am sure will be OK for the few winter months left.

 

[User33236]

SRAM do the PG-950 in 11-28. My CAAD8 came with the 11-26 before I upgraded. You may get away with that with your current derailleur but will possibly need an extra link or two in the chain.

 

[uclown2002]

http://www.ribblecycles.co.uk/sp/ro...bbb-9-speed-cassette-shimano-road/bbbacass090

http://www.chainreactioncycles.com/...nitedKingdom&gclid=CNSmqsaAwLwCFcuWtAodmAwA3w

Not sure if there is a difference between road and MTB cassettes if teeth the same.

http://www.amazon.co.uk/Sram-PG950-11-26T-Bicycle-Cassette/dp/B001MXN3U8

 

[sreten]

Hi,

Its certainly 28 compatible and very unlikely not to be able to handle 30.
If your chain is a sensible length, i.e. the derailleur arm doesn't point a
lot forward on big/big then it will be fine as a relatively new chain.

Though as pointed out in lots of other threads, perhaps also get
a new chain and start rotating them, it makes a lot of sense.

rgds, sreten.

 

[Newman8]

Not tried with 30t, but I have used a short cage rear mech successfully with a 13-29 set up (Campag).

I'm currently on 12-29 cassette with long cage. I find it a good match with standard front 39-53 for the hills. It means you don't really sacrifice your high/fast gears in same way you would with compact.

 

[jack smith]

If it's newer sora you will have no problems I've just put a 32 t on mine with no issues my bike is a speicalized allez