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9 spd derailleur in an 8 spd system(5 posts)

9 spd derailleur in an 8 spd systemThat 1 Dude
Jun 18, 2001 8:56 PM
A friend of mine replaced his worn 8 spd Ultegra derailleur with a newer 9 spd. His shifting is compromised. He says the other components are worn. I say the derailleur is not compatible, after all, the 9 spd upgrade kits include the rear derailleur. Surely, Shimano wouldn't be trying to make us needlessly upgrade our equipment. Does anyone have the technical specifics to clear this issue?
re: 9 spd derailleur in an 8 spd systemLC
Jun 18, 2001 11:09 PM
Shimano claims that a 9 speed will work with a 8 speed, but I have not actually tried it.
re: 9 spd derailleur in an 8 spd systemsonny
Jun 19, 2001 6:00 AM
yes, shimano claims 9spd rd works on 8spds. I've replaced my 8spd D/A rear with a 9spd rear, on a full D/A 8spd set-up. yes, shifting is not as good on a full 8spd grp. I spent hours dialing it in, and after I did, changing cassettes would require tons of adjustment again. I'm now saving up to get a full 9spd set-up, till then I'll have to make do with this.
Yes it works- the rear cable attaches differentlyDave Hickey
Jun 19, 2001 6:53 AM
The rear cable attaches differently for 8 speed. Instead of the cable going under the bolt, the cable attaches on top of the bolt. The 9 speed D/A instructions show how to do it. If you put the cable on top of the bolt, it shifts perfectly for 8 speed
re: Thanks for the helpThat 1 dude
Jun 19, 2001 11:31 AM
Thank you for the enlightenment. I'll inform my buddy of the prognosis.