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Old 03-27-07, 08:07 PM   #1
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Can a SORA Brifter be used for a 9 speed system?

Heres the catch, I have upgraded my Spinergy to 10 speed Ultegras,..I have an Ultegra 9 speed cluster and a Sora Brake/Shifter (leftover from another training roady i sold) as well as other multiple bike parts (leftover upgrades from my BH, almost only the frame is left original, even that is not secure ha ha ha) now can I build a 9 speed running gear using the Sora Brifters? I plan to build a training bike for rainy and trashy weather. I know that Sora Brifters are only up to 8 speed but my mate said it doesn't matter and it can still do it. Whats the real deal? Thanks for your replies in advance.
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Old 03-27-07, 08:34 PM   #2
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It does matter.

The indexing is contained internally to the brifter, and there are only 8 detents, if you will. Meaning that while you could theoretically use them, you can only utilize 8 of the gears. So...pick low end or high end, I suppose.

Another issue may be spacing, though someone else can chime in here. I don't know if the brifters are so specific that the cable pull may be subtly different for derailleur travel, but here is the potential issue. Spacing between cogs on an 8 speed cassette is 3mm, while cog spacing on a nine speed cassette is 2.56mm. Tiny, but if the Sora brifter is calibrated towards 3mm spacing, it will travel the entire lateral distance of your cassette with only 8 indices. Not optimal.
Good night...and good luck
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Old 03-27-07, 08:36 PM   #3
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No you can't. I would just get a cheap 8 speed cassette for an all weather bike. The 8 speed chain is a bit beefier, anyway.
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