hub brakes, disc brakes, or skid braking puts lots of load on wheel, and thus radial lacing is not the best choice. For example my old ATB had v brakes and the front hub was radial laced from Specialized. My new ATB had Disc Brakes and the front wheel is 3 cross, as the spokes must carry the braking load. With V brakes the spokes don't carry the braking load.