Mastercraft Glacier Grip II Winter Radial Tire - 225/55R17 97T The Glacier-Grip II is a premium studdable winter passenger tire. This design is for drivers looking for excellent traction on snow and ice without scarificing performance in dry or all-weather conditions. The intricate tread pattern balances winter traction and a smooth, quiet ride. The deep lateral and notched circumferential grooves provide excellent evacuation of water and slush from the tread contact patch. Incorporates a dense zig-zag sipe pattern that further enhances winter performance while maintaining excellent wet traction. variable sipe depth maintains element stability while optimizing winter performance. Provides an optimal combination of design, quantity and placement of stud pin holes to maximize the tire's traction on ice when studded. The stud pin holes are strategically located across the tread contact patch to allow maximum traction..