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Shimano Dura Ace Upgrade Kit:: compatibility with existing 8-speed components?(5 posts)

Shimano Dura Ace Upgrade Kit:: compatibility with existing 8-speed components?Avidrider
Oct 8, 2002 3:51 AM
I currently own Dura Ace 8 speed and am considering purchasing the Dura Ace 9 speed upgrade kit which includes new shifters, chain, cassette and rear derailleur. My Dura Ace crankset and bottom bracket is 1996 model 7410 and am currently running Stronglight chainrings.

Can I still run the existing crankset, bottom bracket and front derailleur and just get by with purchasing the Dura Ace chainrings or are there any other compatibility issues?
re: Shimano Dura Ace Upgrade Kit:: compatibility with existing 8-speed components?mcteague
Oct 8, 2002 4:56 AM
You won't have any problems. Shimano advises getting the 9 speed inner ring but it makes little to no difference. I have the 7410 and added the 9 speed kit some time ago and it all works fine. When I first put it on I made a mental note to watch the shifts to the 39 ring to see if there were any problems. About 2 hours later I realized I had forgotten to pay attention to front shifts at all and never even noticed it. I guess that means it works the same. There is supposed to be the possibility of the chain "skating" between the two rings with the old crank but I have never had that happen.
AgreeNessism
Oct 8, 2002 6:36 AM
I've been using an 8 speed DA crank and front derailleur along with an otherwise 9 speed DA drivetrain with no problems. I even tried a 9 speed inner chainring but switched back to the 8 speed ring because it made no difference.

BTW, there is no way for the chain to wedge between the rings when using an 8 speed crank. Just an urban legend.

Ed
re: Shimano Dura Ace Upgrade Kit:: compatibility with existing 8-speed components?Avidrider
Oct 8, 2002 8:01 AM
Thanks for the comments!! - I think that will save me the cost of purchasing the chainrings.
What to do with old components?crabeedough
Oct 8, 2002 7:39 PM
Avidrider,
I am building up a 1996 Giant CFR, preferably with Dura Ace 8 speed. What are you planning on for your old parts. I would like to purchase them if you didnt have nay plans. It would save you the trouble of ebaying them. Please let me know soon via emai. pip@wam.umd.edu

Thanks,
Crabby