Not sure what it's for. I can't think why one would want to be able to swap wheels like that. Unless you wanted a bottom bracket that high. I still can't see why.
My folding bike photo essays www.dekter.net/
A "Family bike" for all members?
Last edited by bike.gang.uk; 03-10-15 at 07:35 AM.
For folks of different sizes changing wheel size is unhelpful, IMO, since what one really wants are different saddle-to-crank and saddle to handlebar distances.
I'll add a quick caveat ...
I can see a place for bikes that fit two rim sizes to accommodate different tire widths. For instance, a bike that can fit 406 and 451 tires according to whether you want wide or narrow tires. This would keep the total wheel diameter close ... 406 + 2 * 50 = 506 versus 451 + 2 * 28 = 507 ... and the bottom bracket height roughly the same. Off the top of my head, I imagine that one could build frames for 507/520, 559/584, 584/622.
A solution in search of a Problem where there is not really one.
I could build a 2nd set of 451 wheels for My Disc Bike Friday to swap for the 406 that it has now , If I wished .. But I Don't.
It's a bike that the wheels can be changed.....
Bikes; dual drive Mezzo X2 bullbar previously owned brompton with mods. Also 3 birdies + downtube FS
I think what they are trying to achieve is "Instant bikefit", there must be other parts that are adjustable (the saddle is very suspicious, the stem?). Anyway, will find that out next week.
C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
i'd rather have a kuwahara gaap or an ox gazelle...
I once heard that there was a custom manufacturer -- I think Steelman but I could not locate it on his website -- was building a disc cyclocross type bike for 700c, 650b, and 26" tires.