OPEN U.P.The OPEN U. P. gravel bike stands out as a premier choice, excelling in tire versatility with compatibility for sizes ranging from 700 x 40c to 27. 5 x 2. 1" mountain bike tires, as well as conventional 28mm road tires. Originally designed as a fat tire road bike, the U. P. maintains a geometry rooted in road bike characteristics, ensuring smooth handling and peppy acceleration. Equipped with Campagnolo's Ekar groupset, the OPEN U. P. offers an