Bridgestone – Bridgestone Battlax Adventurecross - Rear, including AX41R rear fitments, 120/90-17 and 120/90-18 sizes, wide 4.60-17 and 4.60-18 sections and 120/80-18 and 4.10-18 options, delivers the drive traction that off-road riding demands. Traction at the rear is what lifts a heavy bike out of a sandy wash or up a rutted climb, so the AX41R uses deep, aggressive blocks with generous voids that clear mud instead of packing with it. Bridgestone tuned the carcass so those blocks flex enough to conform to rock and root, then snap back rather than tearing, which keeps the tire honest over a long trip. On the road section between trailheads the tighter center spacing keeps vibration and howl in check and lets the bike hold a line. Fitments cover 120/90-16 through 18 inch rears in both metric and inch sizing, so vintage-style dual sports and modern adventure bikes both find a match. Mounted with an AX41 front, the balance feels seamless. Remember that a knobby rear rewards correct air pressure more than almost any other tire on the bike, so set it deliberately for the terrain you are actually riding that day.