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  1. #1
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    Shimano tricolor upgrade to 10-speed

    I've been looking but haven't found a specific answer in archived posts (prolly exists, but I haven't been able to find it.) I would like to upgrade my Guerc, currently running 8-speed Shimano 600 tricolor - to 10-speed. I currently have new wheels (Rol volants)
    ultegra 10-speed cassette, chain and R701 STI. My LBS told me I also needed new "10-speed" chainrings and a new front derailleur. My reading is that the 10-speed chains had the same internal dimension (3/32' or something along those lines), but were made of thinner metal to allow them to slip between the thinner spacing on the cassettes.
    (Also, many chainrings are sold as 9/10 speed chainrings.) So, do I really need new chainrings and a new FD, or do I need a new mechanic (laugh).

    Thanks!

  2. #2
    aka: Dr. Cannondale rccardr's Avatar
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    The old chainrings may shift OK, but 9-10 speed ones will be better due to the OD chain dimensions. You may also run into issues with the cage on the 8 speed RD being too wide to neatly manipulate the chain over the cogs.

    My general rule of thumb is that Tricolor is awesome up to 8 speeds, but not so much beyond that (I've built about 20 bikes with 6400 series stuff). The crisper shift feel of components designed around 9 speeds and thinner chains is worth the price of entry, if you ask me. Even 5500/5600 105 components, which are dirt cheap these days, will outperform 6400 when you go beyond 8.

    Others, of course, may disagree. Popcorn, anyone?
    Hard at work in the Secret Underground Laboratory...

  3. #3
    Wookie Jesus inspires me. Puget Pounder's Avatar
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    I've run 7s era tricolor on 9 speed and it worked all dandy, except the front derailleur needed some extra help when shifting. The rear derailleur should work fine, you may need a new front. As for chainrings, you will have to test it out. It'll work, but it won't be optimal. It depends on how fickle you are

  4. #4
    Junior Member
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    Thanks for the feedback. Guess I need to save my pennies for some new chainrings.

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