even if you can;

http://www.guardian.co.uk/lifeandstyle/2010/oct/27/freecross-cross-trainer-wheels

Could be an interesting vehicle to follow – given the right circumstances

err how do you steer it?

bet it’s hard work to get up any kind of hill. Not for me, and I like climbing on bikes.

off road cross training anyone… there’ll be full suss models with disc brakes and gears soon… and of course there will still be the rigid singlespeeders.

bet it’s a bit weird to ride down hill over a few drop offs…

Kev

lean like you are skiing… apparently…

If you could get over the embarrassment, that would be an excellent workout..
Gym machines in the outdoors, I’m sold (if there’s an offroad version)!