Michelin Scorcher 31 Rear Tire (180/60B-17) Michelin&#174; Scorcher&#174; "31" tires are supplied as original equipment on these Harley-Davidson&#174; motorcycles, with approved fitments for additional model years: Super Glide&#174; Custom, Street Bob&#174;, Wide Glide&#174;, XL 1200 Custom, Nights Exceptional Comfort and Handling: The supple casing design and profile of Michelin&#174; Scorcher&#174; "31" tires promote rock-solid handling on winding roads. Long Mileage: Michelin carbon black-enriched rubber compounds promote excellent durability without compromising performance. Michelin ADT Amplified Density Technology - A high-density more-rigid tire casing, which helps deliver excellent feedback and handling. Aramid tread plies on the rear tire resist centrifugal growth, reduce weight, and provide excellent stability.Tire Specifications: Load / speed index: 75V.