Will a 9 speed derailleur work on a 7 speed cassette??

promethius · 02-05-2009 07:15PM #1

Hey Guys

My rear Derailleur snapped today at the end of a run

It's a shimano sora on a Giant ORC4 bike. http://www.devercycles.co.uk/dever-bikes-2006.asp?rnge=XBGNTOCRT06/Giant%20OCR%20Road%20Racing%20Bikes

It's a seven speed set up at the back but i wanted to know if i could use a 9 speed derailleur with it even though its a seven speed cassette?

Want to keep cost to a min and this one would be fine cost wise if it fits and works

http://www.wiggle.co.uk/p/cycle/7/Shimano_Sora_3400_Rear_Derailleur/5360033549/

Any drive train gurus out there who could help ?

Thanks a lot in advance

P

rughdh · 03-05-2009 09:02AM

I have a 9 speed derailer working with an 8 speed chain, which is the same as a 7 speed chain, so I'd imagine that you'd have no problems, particularly with the derailer you linked to. The number of cogs on the cassette doesn't make any difference.

promethius · 03-05-2009 01:00PM

rughdh wrote: »

I have a 9 speed derailer working with an 8 speed chain, which is the same as a 7 speed chain, so I'd imagine that you'd have no problems, particularly with the derailer you linked to. The number of cogs on the cassette doesn't make any difference.

Thanks for that Rugdh, I ended up speaking to someone last night about it and they said the same thing. Will go ahead with that

Would like to add some extra gears eventually but would be a fair few bits to replace this will keep me ticking over for now.

Cheers!
P

Will a 9 speed derailleur work on a 7 speed cassette??

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