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...