Century 400 12 inch Rear Wheel Ninja Warrior Windsor Dominator Ninja Classic 8.630-979.0 12' x 2.25" ninja wheel part number 8.630-979.0 Item #9 in the above photo. Used to repair Karcher Branded machines including but not limited to Ninja Warrior, Windsor Industries Dominator Also marketed under part numbers: 86309790 116918 8.630-979.0 Does not include reducing bushing or axle cap to fit Ninja classic series machines. See part number 9.840-777.0 for that assembly