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  1. #1
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    Keeping an old Suntour drivetrain rolling

    I commute on an old (1989ish) Bianchi Tangent cyclocross bike with Suntour XC Comp components. I love it, but that's not the point of the thread. Recently one of the sprockets on the rear wore out and I had to replace it. Turns out, the Suntour cassettes have different splines than anything that's currently made and a new old stock cassette is at least $80 on ebay! I also can't change to a Shimano hub/cassette without giving up index shifting, since the sprocket spacing is different.

    My question is: how can I keep the bike rolling with mimimal hassle and expense? My thought so far:

    1x Shimano 7-speed hub
    7x 2mm (5 or 6 speed) Shimano sprockets in appropriate sizes
    3x 2.8 mm spacers (I think campy 9-speed uses this size so it should be available)
    3x 3.0 mm spacers (Shimano/SRAM 8-speed uses this size)

    The shifting is 7-speed Accushift Plus. From what I've been reading, this should create a rear wheel from easily available parts that is compatible with my index shifting. Source: http://sheldonbrown.com/cribsheet-spacing.html

    Am I missing something? Will this work? Is there a better alternative?

  2. #2
    Senior Member Ronno6's Avatar
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    The math adds up OK, that is if the Campy spacers fit well on the Shimano FH body.
    It does not appear that 6 speed Shimano cassettes are very inexpensive, either.
    Maybe just best to keep your eyes open for good deals on the Suntour parts.

  3. #3
    Junior Member
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    With a little digging, I think I've found a better solution. I'll get an 8-speed cassette and add 0.5mm spacers to the last two gears. Sources vary, but apparently the higher (physically smaller) gears have 3.3mm spacers, making the total center-to-center width 5.3mm between the three smallest sprockets.

    Thanks to curtisfong for posting the solution in this old thread: http://www.bikeforums.net/archive/in.../t-328150.html

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