Schwalbe Fat Albert Rear Tire - 27.5 x 2.35 Tubeless Folding BLK Evolution Addix SpeedGrip SnakeskinSchwalbe Fat Albert Rear Tire 27. 5 x 2. 35 Tubeless Folding Black Evolution Addix SpeedGrip Snakeskin. Even on extremely steep technically challenging ascents the Fat Albert Rear Tire was designed for maximum propulsion. Locks late when braking providing control and directional stability featuring a tread design that continuous with long tread edges on the stud propulsion sides. Curved propulsion edges on the central studs guarantee high traction