Tubolight Diamana Tire Insert Pair HD/XHD 27. 5"/29"Increased Protection Mountain biking can be rough on your wheels. With a tire insert, you'll have extra protection from rocks and big hits while shredding the trails. The Tubolight Diamana HD/XHD Tire Insert is a lightweight tire insert that is versatile and made from a medium compound to offer increased protection and tire support. It easily installs inside your tire and is perfect for trail and downcountry riding. Features Offers increased protection and tire support while maintaining low-weight HD 29" Heavy Duty Insert designed to trail, enduro, and DH on the front XHD 27. 5" Extra Heavy Duty Insert for enduro, DH, and e-bike use on the rear Weight: 145g (HD), 205g (XHD) | Tubolight | Diamana Tire Insert Pair Hd/xhd 27. 5/29" Hd/xhd, 27. 5/29 X 2. 4-2. 8"