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Old 09-29-11, 08:36 AM   #1
vladvm
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Confirmed - 9 of 10 on 7 works!

No spreading of frame necessary. I upgraded old bianchi 126mm rear spacing with 6600 group 2x10. Kept the old wheels with 7 speed cassette/hub. I took old cassette off. Modified the 10 speed cassette minus one cog. put the extra spacer at the very back near wheel, then place "9" speed cassette then lock ring. I used 10 spd chain and tuned the shifters & derailleurs. Smooth shifting, no skipping or delays.
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Old 09-29-11, 09:08 AM   #2
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too bad the cogs wouldn't spread out to 7 filling the space
given 10 speed chains are lots more expensive than 8 speed
and they do need replacing..
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Old 09-29-11, 09:13 AM   #3
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bob, he could have done 8 of 9 on 7, as that's one of Sheldon's solutions. This post was just to confirm that 9 of 10 on 7 is a solution, too.
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Old 09-29-11, 09:18 AM   #4
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Originally Posted by fietsbob View Post
too bad the cogs wouldn't spread out to 7 filling the space
given 10 speed chains are lots more expensive than 8 speed
and they do need replacing..
depends, I buy online and I tend to replace chain after 3 years (i keep it clean and only fair weather riding) so that's little change spread out in 3 years.

Also used modern 10 speed groups are for sale everywhere, and they are usually still in excellent condition (result of upgradetitis) and so much easier to find than vintage 7 speed STI RSX's
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Old 09-29-11, 10:51 AM   #5
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Also used modern 10 speed groups are for sale everywhere, and they are usually still in excellent condition (result of upgradetitis) and so much easier to find than vintage 7 speed STI RSX's
This is so true. I think it's unfortunate that good 7 and 8 speed shifters can't be bought new. 8S bar-ends are still around, but as far as STIs are concerned it's 9 or 10S only.
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Old 09-29-11, 12:38 PM   #6
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Of course, Vlad will be SOL when the neutral support wagon arrives with a 130 mm wheel.

Just kidding, of course. Cool discovery. I'll keep this in mind should I try to update my '80 Masi.
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Old 09-29-11, 02:31 PM   #7
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Of course, Vlad will be SOL when the neutral support wagon arrives with a 130 mm wheel.

Just kidding, of course. Cool discovery. I'll keep this in mind should I try to update my '80 Masi.
lol...
main reason for the upgrade is I got tired of downtube shifters and I found it quite unpleasant shifting going up and down hill. Then I tried bar-ends but still not doing it for me... Luckily I found a killer deal I could not pass on for '09 6600 group (shifter & derailleurs, crank, BB and cassette) minus the wheels, plus my current wheels remain true and solid to me. hence the experiment.
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Old 09-29-11, 09:44 PM   #8
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This is so true. I think it's unfortunate that good 7 and 8 speed shifters can't be bought new. 8S bar-ends are still around, but as far as STIs are concerned it's 9 or 10S only.
If you want to shift a 7spd cassette you'd prolly be better off with Ergo - lots more 8spd Campy brifters than 7spd Shimano ones. And rather than being stuck with RSX, you could have Record.
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