2009 MTB Race Category Changes Nov 14, 2008 15:14:53 GMT -8 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Mike S on Nov 14, 2008 15:14:53 GMT -8 In 2009 USA Cycling will introduce a new category system for mountain bike racing: Pro,1, 2,and 3. This is more similar to the road and cyclocross categories. Read more here: www.usacycling.org/forms/mtb/MTB_Categories_KeyPoints.pdf