The UCI will allow disc brakes on in cyclo-cross races effective at the beginning of the 2010-2011 'cross season. The organization's management committee approved the change upon the recommendation of its Cyclo-cross Commission. At the same time, other changes to 'cross rules were approved. The maximum tire width has been reduced from 35mm to 33mm. The six-obstacle limit on courses has been changed to refer to man-made obstacles. The plank-type obstacles can be up to 40cm tall instead of having to be 40cm tall, and they must be four to six meters apart... Read on here. Check your new bike here.