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  1. #1
    Senior Member vladvm's Avatar
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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.
    it makes me happy.

  2. #2
    coprolite fietsbob's Avatar
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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..

  3. #3
    slow as I ever was Ex Pres's Avatar
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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.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
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  4. #4
    Senior Member vladvm's Avatar
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    Quote 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
    it makes me happy.

  5. #5
    Constant tinkerer FastJake's Avatar
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    Quote Originally Posted by vladvm View Post
    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.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  6. #6
    Senior Member oldbobcat's Avatar
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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.

  7. #7
    Senior Member vladvm's Avatar
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    Quote Originally Posted by oldbobcat View Post
    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.
    it makes me happy.

  8. #8
    bike whisperer Kimmo's Avatar
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    Quote Originally Posted by FastJake View Post
    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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