The Ground Control Fat tire uses similar knob shapes as the narrower versions in order to offer the best climbing braking & cornering traction for your fat bike excursions. No matter the conditions youll be able to ride with complete confidence & maximize your enjoyment.> Casing: 120 TPI for 26"; 60 TPI for 20" & 24"> Bead: Foldable for 26"; wire for 20" & 24"; 26 x 4.0" Butyl wrapped bead = 2 Bliss Ready> Compound: 60a> 24 x 4.0"; Max Ride 15 psi / Max Install 25 psi; approximate weight 1335g