Originally Posted by
Garfield Cat
So what other gravel bikes can accomodate both 700 and 650 and do it well with a wide array of tire widths and bottom bracket height issues? What designer of frames do this?
And more importantly, how is (can) it be done?
OPEN U.P. just as an example, they have a bunch of info about the frame on their website.
https://opencycle.com/UP
I'm not a frame builder but I think to simply achieve something like 700x38 and 650x47 compatibility you just need a slightly higher bottom bracket, long-ish chainstays that are dimpled on the inside. And there are options like a dropped chainstay or some companies use pretty much a "plate" so the chainstay is as thin as possible. And of course you can widen the BB but that limits crankset options.
I'm sure there are a bunch of other ways I don't know of.
