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Chainring question(3 posts)

Chainring questionradtker
Oct 3, 2002 1:16 PM
Hello, I have a question about chainrings. I have an 8 speed cassette on my road bike and I need to replace the chainrings. Some things I've read seem to infer that there are different chainrings for 8 and 9 speed cassettes, but other things seem to indicate that there is no difference. What's the deal, can I just order some shimano chainrings? Will they work? Thank you for your help.

re: questionChen2
Oct 3, 2002 2:48 PM
Are you asking about changing the chain rings on the crank set or the cogs on the cassette? "9-speed" chain rings should work on your "8-speed" crank-set. 9-speed cogs will work on an 8-speed cassette as long as they are spaced properly, but in general you can't order individual cogs from Shimano, you can get them from
try this site...C-40
Oct 3, 2002 5:44 PM

The difference between 8 and 9 speed shimano chainrings is mainly in the spacing. The 9 speed inner ring is closer to the the big chainring. You'll notice that some of the aftermarket brands of rings claim to be 7,8, or 9 speed compatible.

Also check out the cassettes area of the Brandford site. There's more info on chains, cassettes and derailleur compatibility.

With the high cost of chainrings, you should evaluate the condition of all your components before spending a lot on outdated 8 speed stuff. If your chainrings are truly shot, a lot of other parts may be close to their limit. If so, it's time to dump the 8 speed and move on to 9.