The Kenda Nevegal tire makes an excellent outdoor wheel set-up. Select the right tire and wheel size and you can dial in a set of these to be interchangeable with your normal street wheels! The Nevegal’s rugged tread pattern make it the ultimate tire for all conditions – loose hard pack and wet surfaces. How iRoll Sports recognizes Kenda’s commitment to quality making the Nevegal the perfect choice for an outdoor wheelchair wheel. The knobs are specially designed to penetrate and hold on rugged surfaces while keeping rolling resistance to a minimum. That is perfect for anyone wanting to take on the challenge of different terrains without overtaxing their shoulders! Taking it further the 22″ and 24″ sizes contain a special additive in the compound to make it the least marking black knobby tire available. Sizes: 22″ (50-501) 24″ (50-540) 25″ (50-559) Width: 22″x1.95″ 24″x2.1″ 25″x1.95″ Color: Black Tread: Knobby non-marking compound in 22″ & 24″Puncture Protection:“Iron Cap” *Sold per Pair. Wheel/Tube NOT included.