I'm a bit bigger than you, and looked quite a bit for a cross bike that would fit me, so unless there's something new I don't know about, I'm pretty certain that the Redline may be the only off the rack purpose built cyclocross bike that will fit you…. REI does carry a kids Diamondback that looks nearly identical, with the exception that it is equipped with road tires rather than knobbies - but it has V-brakes so it could certainly accommodate bigger tires.