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problems to look out for in Shimano600 8 to 9-speed upgrade(4 posts)

problems to look out for in Shimano600 8 to 9-speed upgradetimschaefer
Oct 15, 2002 5:23 PM
I just purchased a used Schwinn Paramount Series 9C PDG 8-speed road bike with a carbon fiber frame that I believe is from the mid 1990s. The components are Shimano600. It is in good shape, but the previous owner had the original shifters replaced with new ones due to a problem that he was told was not fixable. Unfortunately, the new shifters he put on were Shimano Sora shifters, which I don't like since it is very awkward to down-shift in the drop down position. I've thought of looking on ebay for the higher quality original shifters to replace the soras with, but with the wear in the rest of the drivetrain has me thinking I might just upgrade to Shimano 105 9-speed.
The question is (finally) what specifications should I look for on the bike, such as length of the component (freehub, maybe) that the cassette slides onto, etc. that will let me know whether it is possible to upgrade without too much hassle.

thanks, tim
You will need........gogene
Oct 15, 2002 6:46 PM
A 9-speed cassette, which will fit right on the rear hub with no modifications, a right 9-speed shifter assy., a 9-speed rear derailluer, and a 9-speed chain. Go here: to find the best price for the new components you need. Or you can buy used.
actually, you may be able to get by with the old derailleur.rufus
Oct 16, 2002 7:45 AM
since the movement is determined by the levers, if the rear derailleur shifts across the cluster fine, then you may not need to replace it.
re: problems to look out for in Shimano600 8 to 9-speed upgradeIronbutt
Oct 17, 2002 4:27 PM
You will need the following: new shifters, new cassette (which will slide right on the 8 speed freehub) new 9 speed chain and a new inner chainring. The front and rear derailleurs will work fine. The new inner chainring is recommended, although not absolutely necessary. The 9 speed chainring will be closer to the large ring and will insure that downshifts fall directly onto the teeth of the chainring. The rear derailleur will work fine, in fact the 9 speed 105 and Ultegra are listed as being 7, 8, and 9 speed compatible.