Instantly modify your handlebar height to adapt to changing riding conditions. Utilize the lower position for trail / sit down riding: extend to maximum height in seconds for stand up riding. No tools required to make the adjustment, just flip the lever. Adjustable length: 6.9" to 9.3" (175 mm to 235 mm) high. Patent pending US20150360713A1. - Summit X and SP with 190 mm riser (2017) 175-235 mm