For the record, I said that we were on 'cross bikes. For dirt/gravel rides, they're equipped with 40mm moderately-knobby tires, which provide great traction and a reasonable amount of cushion on the rough stuff. OTOH, the fast guys who were racing the event were on road bikes with 25-28mm slicks. Kudos to them!A man that said that he descends wet dirt roads on a road bike on 17% grades has all of the great ability necessary for this group.