???????????????????????????????? - Loose Condition Cross Country XC Bicycle Tire ???????????????????????????????????????????? - The Terestre XC mountain bike tire is our choice for hardpack and rocky trails. This tire features alternating center tread for speed and traction, shoulder blocks that aid in cornering and braking, and unique siping across all the knobs that ensure predictable handling. Includes Stage XC Armor and Rubberforce G tread compounds for a versatile and responsive ride across various terrain. ST???????????? ???????? ???????????????????? - Cross Country (XC) specific combination of 120 TPI casing and 'skin' for a lightweight and supple ride. ???????????????????????????????????????????? ???? - our specially-tuned rubber compound engineered for dependable grip on mixed terrain and daily adventures ???????????????????????????????? ???????????????????? - The ultimate construction delivers a combination of speed, comfort and flat protection when combined with tubeless specific sealants. WIDTHS ??? American Classic???s mountain bike tire widths meet current global standards set by E.T.R.T.O. following their designated design size rim widths. 2.25in (57mm) tires are designed for rims with 25mm internal widths while 2.4in (61mm) and 2.5in (64mm) tires are designed for 30mm internal width rims. The use of narrower or wider rims will change the overall width of the tire. RIM FIT ??? American Classic tires follow the current dimensions set by E.T.R.T.O. and ISO 5775. These specifications improve rider safety through functional pairing of tires and rims that both meet these standards. The resulting tighter tolerances also lead to a tighter fit on rims. This may require some users to change their installation process from what they used with tires and rims that followed previous standards.