http://www.maxxis.com/catalog/tire-278-121-ikon Fast rolling XC/AM/Trail Tire. Good bite climbing in most conditions....except sticky mud. 2.2 size makes a great rear tire, while the 2.35 makes a great front or rear tire. Available in EXO sidewalls and TR.....fast rolling, lightweight, and durable. The 2.2 is my go to rear tire on the SS and on the Tallboy....occasionally going with a 2.35 on the TB. Not everyone needs monster truck tires on their mtn bikes. Only time i really have any issues with these tires is when they are about worn out. They do become pretty slippy. However, I have had them out on Palm Canyon, Noble Canyon and last weekend on the San Gabes ride...not once did I think they were not enough tire.