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  1. #1
    Junior Member
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    First Post and first two questions

    First post in tandems second post on bike forums. Used to follow the wreck.bikes* hierarchies on Usenet but have been away from enthusiast cycling for about 10 years.

    The bike is a 98 Trek T-50 and is new to us as a gift from friends of the in-laws. They were the first owners and tandeming didn't stick for them so the bike is low miles. Under the stokers left leg, is the what I believe is called the "cross-over" chain ring. On our vehicle, that chainring is a double. There are two chainrings in parallel and without counting, it looks like the outside one is just a couple of teeth "shorter" than the one that actually has the timing chain on it at present. What purpose might that outside chainring have? Could it be to lower/raise the overall ratios for hilly/flat courses? If so, I imagine changing to the other chainring involves messing with the eccentric? Okay, that's one question.

    What dealers within an hour or so of the greater Los Angeles area have expertise with tandems? I know Bicycle John's in North Hollywood used to but I haven't been there in about 10 years. I know Helen's can put me on a Cannondale but anyone else? The Trek was given to us and it'll serve to get us started but I know I'll soon be jones'n for something that's less of a tank.

    Thanks

    Mugre
    Trek T-50 Tandem
    Team=104 and 402 with bike.
    1980's Univega Hybrid for errands
    Torelli Countach drop bar bike (mothballed for now)

  2. #2
    Senior Member WNY tandem's Avatar
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    That double chain ring on left, could there have been a child stoker kit installed at some point?

  3. #3
    Junior Member
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    Quote Originally Posted by WNY tandem View Post
    That double chain ring on left, could there have been a child stoker kit installed at some point?
    Good call. A closer look showed the mounting marks for the child cranks on the stoker's seat tube.

    thanks,

    Mugre
    Trek T-50 Tandem
    Team=104 and 402 with bike.
    1980's Univega Hybrid for errands
    Torelli Countach drop bar bike (mothballed for now)

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