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Going 9-speed, need a tech assist(8 posts)

Going 9-speed, need a tech assistJoBu
Feb 24, 2002 5:49 PM

I have a '98 Klein Quantum Race with the stock Ultegra 7-speed set-up on it. I'm currently in the process of getting a new set of wheels and some Dura-Ace 9-speed components for it (STI levers, cassette, chain, and rear derailleur). Will I also need to replace the front derailleur as well?? I'm not sure why I would but I've seen some of them listed as 9-speed comptaible. Any assistance would be greatly appreciated.


re: Going 9-speed, need a tech assistLigon
Feb 24, 2002 6:21 PM

I am not sure if you realize it or not but your rear dropout spacing is to small to accommodate a 9 speed casette. The spacing between your dropouts is currently 126mm and to run 8,9,10 speed systems the spacing must be 130mm. A good bike shop can spread the frame to allow you to upgrade to 9 speed. I am not sure of the frame material but if it is steel this should not be a problem. If the bike is aluminum of titanium this may or may not work.

You will also need a nine speed front der.

Hope this helps,

re: Going 9-speed, need a tech assistRusty Coggs
Feb 24, 2002 8:41 PM
What's a 1998 quantum race doing with 7 speed ultegra on it.Sure you did not mis-count?
I'm with RustySpoke Wrench
Feb 25, 2002 5:58 AM
Are you sure your bike doesn't have 8 cogs back there? If it is a seven, it is an older bike but never fear, most 7-speed cassette rear hubs use the newer 130mm spacing. A 126mm Klein, however, can't be spread will remain 126mm till the end of its days.

Next question: "Double or triple?" 9-speed front derailleurs have a cage that is a "smidge" narrower than earlier derailleurs to accommodate the narrower chain. My belief is that the 8-speed derailleur can be made to work on a double but not for a triple.
Feb 25, 2002 12:10 PM
If it really is a 7 speed then you'll need new crank and BB as well as the front der. The whole spacing thing is the issue. If it's really 8 speed then you should be able to get away with a 9 speed inner chainring (spacing between rings) the front der. BTW - as pointed out by other posters you really should be running 8 speed if the year of the bike is correct and it's stock - that's the way they came. Either you've been sold a bike that is much older than '98, a newish frame has been cobbed together with old 7 speed parts, or someone has miscounted the gears. In any event it's worth it for you to dig a little deeper and check on things - someone may be trying to pull a fast one on you.

Recognize that upgrading from 7 to 9 speed is a complete drive train replacement and usually a dropout spread, while going from 8 to 9 speed is more incremental. In either case it's not exactly cheap - look for a deal on an upgrade kit from places like and others. You can also score excellent stuff from Ebay and others for cheap.

By the time you get done paying full retail on new wheels and the componenet cost on a new drive train you can buy a complete new bike and sell your current bike - no joke.
Feb 25, 2002 1:07 PM
I tried to explain that to my wife. She said sure I could get a new bike but it wouldn't be my Pinarello. I found a
the same frame in her size for $425 and tried to talk her into a new bike, but she didn't want two that are the same.
So the upgrade totals came in about $800.
Feb 25, 2002 1:20 PM
I've nickle and dimed myself to death "upgrading" before. Sell your bike, take your budgeted "upgrade money" and get a new bike. Unless your just ABSOLUTELY thrilled with the Klein. Then do as grzy says...
start overripSRV
Feb 28, 2002 2:12 PM
Go buy a new bike completely assembled and ready to ride out the door. I've upgraded old stuff and it never ends. Go to LBS and make an offer on last year's model something. Ya don't need Record or Dura-Ace hung on a $1,500 frame.

Keep the Klein for a bomber and get out the checkbook.