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  1. #1
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    Trek Y-Foil Front Derailleur

    I recently picked up a Y-Foil frame set off Craigslist and had my LBS inspect the integrity of the frame. It got a clean bill of a health and looks to be in excellent shape, given the fact that it's from 1998. It was definitely ridden but it was not put away wet.

    Ironically I had the same bike (gold) back in the early 2000s but sold it, so I was pretty excited about picking up what appears to be an excellent project bike.

    I know zip about building bikes but I picked up a few books, some tools and was going to give it a shop through my local bike collective (http://davisbikecollective.org).

    Ideally I'd like to find a 7700 Dura Ace 9-speed group to keep everything original but someone (local to me) is selling a full Ultegra 6800 group from a take off project for $550 and it seems too good to pass up.

    Am I going to run into compatibility issues with such a new group set on an older, unique frame?

    Thanks for dealing with my n00bish question(s).

  2. #2
    Senior Member
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    No problem with 6800 compatibility, but I question the value of used components. The $550 may or may not be a good deal. See if you can buy it for less.

  3. #3
    biked well well biked's Avatar
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    I don't know if the 6800 deal includes wheels, but you'll need a rear wheel with an 11 speed compatible freehub body to use with the 11 speed cassette.

  4. #4
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    Quote Originally Posted by Al1943 View Post
    No problem with 6800 compatibility, but I question the value of used components. The $550 may or may not be a good deal. See if you can buy it for less.
    +1. The real unknown with any used group is the brifters. They may last thousands of miles or may quit tomorrow and, with no warranty, they are the highest cost item of any group if they die.

  5. #5
    Licensed Bike Geek Davet's Avatar
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    You may also run into front derailleur height issues if your new group includes a compact crank. Back in the day of your 'Foil, the standard cranks had 52/39 chainrings while compacts have 50/34. The derailleur tab on the Y-Foil may not have enough vertical adjustment to get the der down to the proper height for the 50t chainring.

    If there's enough meat on the tab you could file the slot so the derailleur could be mounted further down to be in the correct position.

    By all accounts the 6800 group is excellent and derailleur height notwithstanding, it should function perfectly on the Trek. As noted above a wheel set with 11-speed capability is required.
    Last edited by Davet; 04-03-14 at 04:47 PM.

  6. #6
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    Quote Originally Posted by Al1943 View Post
    No problem with 6800 compatibility, but I question the value of used components. The $550 may or may not be a good deal. See if you can buy it for less.
    They're brand new components, take off from a brand new bike. They've never been used. The 11-speed 6800 group set fetches $750 MSRP and I've never seen it sold below $650 (new).

  7. #7
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    Quote Originally Posted by well biked View Post
    I don't know if the 6800 deal includes wheels, but you'll need a rear wheel with an 11 speed compatible freehub body to use with the 11 speed cassette.
    It does not. I recently converted both my bikes to 11-speed so wheels are not a problem. Good tip, though. Thank you.

  8. #8
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    Quote Originally Posted by HillRider View Post
    +1. The real unknown with any used group is the brifters. They may last thousands of miles or may quit tomorrow and, with no warranty, they are the highest cost item of any group if they die.
    Indeed. It's why I'm so hesitant to buy a Dura Ace 7700 group set, given how old it would be. I suppose there there are NIB ones floating around but I also think they're probably equal to (or greater) than the cost of a warranty protected 105 kit.

  9. #9
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    Quote Originally Posted by Davet View Post
    You may also run into front derailleur height issues if your new group includes a compact crank. Back in the day of your 'Foil, the standard cranks had 52/39 chainrings while compacts have 50/34. The derailleur tab on the Y-Foil may not have enough vertical adjustment to get the der down to the proper height for the 50t chainring.
    Davet... that hits the nail on the head. Thank you.

    My apologies for not being clearly with my original post. Given the oddity of the FD hangar I was concerned that a more modern group set might have mounting or compatibility issues. I considering the 6800 mostly because it's the cheaper of the two available Shimano 11-speed options and I just went through the financial hassle of converting two sets of nice wheels to 11-speed. Although with the announcement of 105 going to 11-speed I might hold off and see where actual pricing falls.

    I'll chat with my LBS mechanic to see if they can simulate a 50/34 and a 6800 FD on the bike for the purposes of vertical adjustment. That's a great tip.

  10. #10
    Constant tinkerer FastJake's Avatar
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    +1 The only possible compatibility issue is the FD going low enough for a compact crank. The wheels, brakes, RD, crank, shifters, etc have not changed their method of mounting since the Y-foil.

    BTW.... I've been dying to get a Y-foil ever since I first saw one. They look amazing and so aerodynamic. So I'm very jealous.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

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