Maxxis xenith hors categorie tyrethe hors categorie is a professional level road racing tire with a 120 tpi casing the hors categorie offers two different rubbercompounds to optimize your ride the harder 62a center has ultra low rolling resistance and wears slowly while the softer 57a side offers incredible grip in tight corners specifications size 650x23c 23 571 tpi 120 bead foldable weight 200g max psi 130 bike tech nylon breaker size 700x20c 20 622 tpi 120 bead foldable weig