Propain Bicycles Tyee AL The New Perspective. A versatile and balanced mountain bike that sets new standards on the climbs and descents. With its steep seat angle and progressive geometry, the Tyee AL is a potent climber that kills it on the descents thanks to its full bikepark rating. The Propain Tyee AL is our Next Level Performance Enduro! Frameset specs/inclusions: - Blend Alloy Frame - 29 or 27.5" wheels - Boost 148x12 rear spacing - 160 mm / 170 mm front travel - 160 mm rear travel - with