The crossmark is the dramatic evolution of the cross country racing tyre the nearly continuous center ridge flies on hardpack yet has enough spacing to grab wet roots and rocks the slightly raised ridge of side knobs offers cornering precision never before seen on a tyre this fast fast rolling centre ridge raised side knobs for better cornering compatible with front or rear specification conditions hardpack loose over hard medium cornering control 1 2 3 4 rolling efficiency 1 2 3 4 tpi