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Customising Ultegra 9speed cassettes.(6 posts)

Customising Ultegra 9speed cassettes.Ping_Pong
Jul 18, 2002 7:31 AM
I would like a 13 - 25 cassette for my long solitary rides. Are there any problems mixing up the cogs from other Ultegra cassettes ? For example are there implications for shifting performance if I mix different cassettes?
Easiest answerSpoke Wrench
Jul 18, 2002 7:49 AM
is just to buy an Ultegra 13-25 cassette. QBP part number is FW6711.

Mixing and matching cassette cogs can sometimes be done, but it's not as easy at it appears at a first glance. First and second position cogs are different from the rest so you can't just stick in any cog from any other cassette. The biggest cogs tend to be riveted together in groups so individual substitutions are difficult. You'd like to maintain fairly equal gaps between cogs, and you'd like to hold the cost down to something less than two complete new cassettes. I've not had good luck coming up with the right bits to do all that.
Didn't mean to duplicate, posted at same time. (nm)Chen2
Jul 18, 2002 7:59 AM
re: Customising Ultegra 9speed cassettes.Chen2
Jul 18, 2002 7:55 AM
Shimano makes an Ultegra 13-25 and if that's what you want, it would be best to buy it that way. It is possible to mix cogs from various Shimano cassettes as long as you understand how they are spaced. I mix 9-speed cogs quite often with good results. Sheldon Brown,, sells cogs that can be used to customize cassettes, but they are not necessarily built by the "big S". They are compatible, I've been running a home built 13-25 and a 13-26; for my wife I put together a 14-28. These include Dura-Ace, Ultegra, XTR, and Sheldon Brown cogs. I think they shift as well as an original Ultegra. Your results may vary.
Your LBS can order Shimano cassettes that are not often carried by the catalog sources.
The Shimano European web site has exploded views and charts for the various available 9-speed cassettes.
Cheers guys - I'll just buy one ! (nm)Ping_Pong
Jul 19, 2002 4:19 AM
re: Customising Ultegra 9speed cassettes.d-boy
Jul 20, 2002 6:22 AM
The latest catalog from Colorado Cyclist now lists Ultegra 13-23 and 13-25 cassettes for the same reasonable price as the others.