The Larry tread applied to a very large casing. This tire measures about 4.7" on a 100mm rim! What does this mean to you? Float, float, float, my friend. Traction, Jackson. Larry tread provides good grab and steering in a multitude of conditions. For those of you looking for the maximum in traction and floatation, you have just found the mother lode. Available in 120tpi casing, in wire or Kevlar bead.