From coopertire.co.uk : Discoverer H/T 4x4 tyre - Four Wide, Notched Circumferential Grooves: Offers resistance to hyroplaning while improving snow traction. - High Density ‘Zig-Zag’ Sipes: Improves steering response while reducing noise. - Q/R/S/T/H-Rated: Suitable for a wide range of vehicles including SUV’s, light trucks and vans up to 1 ton - 80% on road, 20% off road