That's the bias-ply Bridgestone Battlax BT45 130/80-17. 2nd one. First one got torn to bits on a 105 degree day when I hit some very sharp-edged gravel (also destroyed my rear and side car tires!) This one is doing fine. I've recommended this tire to a number of inmates. Fellow inmate szurszewski who is wandering the country on a big K1200LT-Hannigan rig with a trailer (see Bakery Quest) got 21,000 miles from one on his rig.