Huck Norris’s mission is to eliminate the fear of wheel and tyre damage. we aim to put the mountain bikers mind at ease so that you can concentrate on your riding and not worry that your tyre will get punctured or your carbon rim might get destroyed. Thank science there is a cure! Say hello to Huck Norris. HUCK NORRIES TYRE PROTECT SINGLE FEATURES VERSION RECOMMENDED INTERNAL RIM WIDTH RECOMMENDED TIRE SIZE RECOMMENDED USE WEIGHT 27.5″  S 21-26MM (0.82 – 1.1 INCH) 26″ / 29″ / 27.5″ 2.1-2.4″ TYRE XC, TRAIL, ENDURO ~75G M 25-35MM (1.06 – 1.38 INCH) 26″ / 29″ / 27.5″  2.25-2.5″ TYRE TRAIL, ENDURO ~80G L 34-45MM (1.34 – 1.77 INCH) 26″+ / 29″+ / 27.5″+  2.5-2.8″ TYRE TRAIL, ENDURO ~85G