The tubeless wheel tyre system for adventurersmountain bike wheel crossroc xl wtscrossroc xl brings the wheel tyre system benefits to the enduro adventurers the wide 21 mm ust rim perfectly matches the all new crossroc quest all round ust ready tyre allowing to ride fast and worry free in the harshest conditions available in 26quot 275quot and 29quotweight 1825 grams pair 26quot without tyre key benefitsenduro proofwide 21 mm ust rimwide 24 crossroc quest tyre with guard prote