Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
Wheel size is a non-issue. A lot of people commute on folding bikes with 20" or 16" wheels. If your BMX is set up for efficient pedalling, which mainly means having the handlebars and especially seat at the right height, it should make an acceptable commuter. Most of the kids I see riding BMX-style bikes (which I presume are not the same thing as BMX-bikes) have the seat set much too low and the handlebar too high, and I can't imagine riding like that.