Is my rear mech knackered?

[Banjo]

My bike is a fairly tired Appollo CX10S 21 SPEED Hybrid with entry level Shimano Tourney derailleur.


I seem to be condtantly having to reindex my gears. Getting them to change smoothly from 7 to 1 is no problem but coming back down sometimes you have to change twice for the chain to move then it jumps across 2 gears.

The cassette is only a few months old I am thinking maybe the derailleur mech is tired.Does this seem likely?

I dont know how long I need to keep this bike running as I am hoping to get on cycle to work scheme and buy something with better quality bits.

 

[TheDoctor]

Sounds like cable stretch to me, perhaps?

 

[fossyant]

New cables....lots of lube on the mech, and you'll be off.

 

[Gerry Attrick]

Yep. Sounds like the mech is sticking possibly due to crud build up. Remove and clean it in degreaser, then re-lube and re-fit. Hopefully all should be well.

 

[Banjo]

Thanks to everyone for the advice.Will have a go over the weekend. Cheers.

 

[HLaB]

I thought my rear mech was knackered too, despite me cleaning and oiling. I was advised new cables and they were right .

 

[Mr Pig]

New cables....lots of lube on the mech, and you'll be off.

Yip. Rear mechs can be very worn and still work perfectly. Although there may be a great deal of play in the assembly the cable/spring tension effectively holds the cage tight. Poor shifting is far more likely to be a result of sticking in either the cable or the mech itself.

 

[Banjo]

Thanks again for advice. I found time this morning .Used my new chain tool for the first time.Stripped degreased dried and re lubed chain ,mech and cable now seems to be all OK. :-)