This is a 450/600-17/18 Michelin tube with a TR13 Offset rubber stem. Recommended application is for Bias Ply tires and the recommended tire fitment is for a 450/600-17/18 Bias Ply tire. Fits 450-600 width, 17-18 inch diameter tires. This 17 inch inner tube has a TR13 rubber stem and the valve stem location is Offset. TR13 stem is rubber stem 1 1/2 inches tall, 3/8 inch in diameter. Actual item may differ from photo. Eclectic Tire Company features a huge selection of classic Michelin Heavy Duty inner tubes.