Mike Aitken has designed a few different versions of tires, & is one of the most popular among professional & non-professional riders. The first version is designed specifically with dirt in mind. Based off the classic knobby front tire, the 2.125 Aitken is available in a foldable kevlar beaded version (Klyte) or a non foldable steel beaded version. Dirt tires don’t usually see the sidewall wear that street tires do, so to keep the weight down, the knobby 2.125 is only available in single ply, & is rated at 80 psi. With all this talk about dirt, Mike & Chase Hawk use this tire on the front at all times, on street, park & everything they ride. Mike also knows not everyone uses an aggressive knobby like He & Chase so he has the “semi-knobby” version also. Based loosely on the Path tire, the 2.25 & 1.9 versions have deeper treads that the Path, but are still designed for all around use, & high speeds. The 2.25 is our biggest tire & typically used as a front, but is also u