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  1. #1
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    Question on a Convoluted Frankenstein Drivetrain Upgrade

    I'm upgrading an online acquisition from a 8 speed Shimano 600/older Dura Ace drivetrain to a 10 speed setup and want to make sure my plans for upgrading are sound because there's some funky aspects to it. I've checked on here and think I'm okay but I'm not the best at wrenching.

    Here's my setup as it currently stands:

    Shimano 600 Shifters
    7700 FD
    7700 RD
    7410 Crankset
    Unknown 8 Speed Casette I think Hyperglide

    I'm planning to go to this:

    Shimano 6603 Shifters
    7700 FD
    7700 RD
    7410 Crankset
    PG-1070 12-26 Cassette

    Obviously chain will change from 8 to 10 speed.

    Here are my two points of concern that I think are OK but want to double check:

    1) Using the 6603 that I acquired on a double crankset having one clock "feather"
    2) Using 7410 with a 10 speed drivetrain
    3) Will the new cassette will fit my current older Mavic Cosmic Elite rear hub/freewheel body?

    Thanks in advance.

  2. #2
    cs1
    cs1 is offline
    Senior Member cs1's Avatar
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    Quote Originally Posted by kpthot View Post
    I'm upgrading an online acquisition from a 8 speed Shimano 600/older Dura Ace drivetrain to a 10 speed setup and want to make sure my plans for upgrading are sound because there's some funky aspects to it. I've checked on here and think I'm okay but I'm not the best at wrenching.

    Here's my setup as it currently stands:

    Shimano 600 Shifters
    7700 FD
    7700 RD
    7410 Crankset
    Unknown 8 Speed Casette I think Hyperglide

    I'm planning to go to this:

    Shimano 6603 Shifters
    7700 FD
    7700 RD
    7410 Crankset
    PG-1070 12-26 Cassette

    Obviously chain will change from 8 to 10 speed.

    Here are my two points of concern that I think are OK but want to double check:

    1) Using the 6603 that I acquired on a double crankset having one clock "feather"
    2) Using 7410 with a 10 speed drivetrain
    3) Will the new cassette will fit my current older Mavic Cosmic Elite rear hub/freewheel body?

    Thanks in advance.
    The crank is no problem. The 8 sp rear der is the ONLY Shimano rear derailleur that has a different actuation ratio. You might be better off with a DA/Ultegra 9/10 sp version. You can get pretty good money on ebay for older DA ders. Good luck
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  3. #3
    Senior Member
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    The 7700 derailleurs are 9-speed, if those are what you have they are compatible with 10-speed Shimano shifters and chain.

    The 8-speed crankset will probably work with 10-speed since it is a double.

    The triple shifter should work with the double crankset. The normal cable setup is usually best.

    Many MAVIC hubs (not all) require a special MAVIC 2mm spacer at the back of any Shimano compatible cassette. This spacer should come with the hub. If using a Shimano 10-speed cassette you would need the thin Shimano spacer at the back of the cassette in addition to the MAVIC spacer. I don't know about other Shimano compatible cassettes.

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