The Quickie® XTR "Xtreme Terrain Reflex" is the first monoshock suspension chair on the market. The Quickie XTR features Rock Shox a unique suspension system developed exclusively for Quickie. This system offers superior performance with factory-tuned rebound and compression, as well as better side to side stability. With the Quickie XTR the rider is assured a smooth, stable ride over a variety of terrain.