N - 2 + 1.5 (one bike, two wheelsets) -- viable?

[Rory Woods]

Hi all, 

Hope everyone is getting along well this winter. 

I'm preparing to move to a smaller space and am thinking about if/how to downsize the small fleet of rim brake bikes. I have an idea that a disc frame with a 700C wheelset for more road-oriented riding and a second 650B wheelset for more dirt could take the place of two bikes. 

I recall reading that Jan doesn't think it's a good idea to design a bike to accommodate two wheel sizes. That said, I'm wondering if others have tried this and / or if it seems like an idea worth exploring further. 

Curious to hear others' thoughts and experiences. 

Thanks!
Rory in dark and misty Walnut Creek, CA 

[Josh Zielinski]

I have a few friends who have this 2 wheelsets set up but only one regularly switches them.  Bikes vary from State to Trek to Breadwinner custom (he's the one who switches--also lives in the smallest space...).

The others have issues here and there with things (discs, gears, etc) lining up or just don't want to do it all the time.  They either ended up with another bike (that they didn't originally want to) or they just leave one set on and the other collects dust.  I think one sold the other wheelset recently...  Just rides 700x38mm slicks all the time/everywhere.

I'm running a fleet of rim brakes and don't have personal experience.  It does seem like a good idea though if it works out.

Josh Z

Oregon 

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[User 47]

II imagine if the two wheel sets Used the same hub set brake rotors and cassette. Everything would switch over just fine. The only difference would be in the geometries. But plenty of people convert their bikes from 700 C to 650 B without issue so as long as you are adaptable, I don’t think it should be a problem.