The Rockadile ALX Disc has several upgrades over the AL version as well as the Disc Brakes. The Improvements make the bike Easier to Ride, More Comfortable and More Enjoyable. It features a Heat-Treated Alloy ATB Frame; New SunTour M2025 Suspension Forks; Shimano Cranks, Shimano 24-Speed Altus Gearing, ProMax Alloy Hubs with Double-Walled Rims; ProMax Mechanical Disc Brakes and 2-Finger Levers