The Ground Control Fat tyre uses similar knob shapes as the narrower versions in order to offer the best climbing, braking, and cornering traction for your fat bike excursions. No matter the conditions, you'll be able to ride with confidence and maximize your enjoyment.Casing: 120 TPI for 26"; 60 TPI for 20" and 24",Bead: Foldable for 26"; wire for 20" and 24"; 26 x 4.0" Butyl wrapped bead = 2Bliss Ready,Compound: 60a,26 x 4.6"; psi 5-20; approximate weight 1450g.