The Mainline is S&M's trail dedicated tyre but they also make for a really durable street tyre. Available in two sizes the 2.2" has a micro knurled surface on a directional tread designed to go on the rear, with its centre tread and V-notched edge for accelerating and a flat edge for braking. The 2.4" front tyre size is a nod to the old 2.125 Comp III we all grew up riding in the front, featuring additional angular rasied tread sections keep the larger, front specific Mainline on the blue groove in turns. Max pressure rating: 110 psi. ###section### Product Specs WHEEL SIZE: 20" MAX PRESSURE: 110 PSI WEIGHT: 737g (26oz) PACK SIZE: Single Colour: Black; Size: 2.2", 2.4"