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Join Date: Dec 2004
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Chainline and the quest for perfection.
Recently discovered the forums, and this thread, and I'm quite plussed that there's a good community out there. And, as with all mere mortals building their first fixie (and first bike in 10 years I might add), I find myself compelled to ask for a bit of help.
Chainline and the quest for perfection. I'm running a quando low flange flip-flop (the wheel I bought came off a recent fuji track bike), set up with no dish, 120mm spacing. The frame I'm building my mean machine around is a 126mm spaced road frame, late '70s or early '80s I suspect. I'm nearly finished building the bike, but I find myself getting stuck in the details pertaining to the drivetrain... I've done some initial rough measurements using Sheldon Brown's instructions, and to my perplexion I keep coming up with a chainline of about 38mm. From what I gather from the research I've been doing, most track cranksets, and the inner ring on double chainring setups tend to sit around 42mm when mounted to a bottom bracket with an appropriate spindle length. I haven't bought cranks yet, as I want to sort out a solid plan before I start chucking any more money around (this project's already $150 over budget!).
Short of re-dishing the rear wheel what can I do to balance the 4mm difference between my front and rear chainlines? I've never heard of a wheel needing to be dished TOWARDS the drivetrain... But then... I'm new to this! Additionally, wouldn't dishing the wheel towards the drivetrain mess up my ability to take advantage of my flip/flop by throwing the opposite side completely out of line?
Any insight would be hugely appreciated oh mighty fixers!