I built a Free Radical up on a '93 Trek 930 (powder coated frame, fork and frame attachment Surly Sage Green). Was thinking about running 22" BMX on rear built with disc breaks and 24" up front. Any thoughts? Main goal is to lower everything a bit and get a smaller wheel on back. Attached photo is of current build set up. Redline mini-BMX bars and Cannondale stem serving up stoker bar duties. XT linear pull brakes in rear and DX canti's up front.