Dirt Bike Tires that have been put to the test. Nicoll Racing has out the Bridgestone 404 / 403 tires to the Glen Helen 24 hour test. This tire out performed the Dunlop in that we only changed two rear Bridgestone 404 tires in that race. In the years past we ran the Dunlop 756 Tires and had to change the rear three times with missing tread every tire change. Nicoll Racing still likes the Dunlop 756 for its taction on slippery tracks. If you're looking for the best of both worlds in a dirt bike tire then the Bridgestone 404 is the way to go. Nicoll Racing, only selling Dirt bike tires we have Tested.