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: 5.1" to 8" (130 mm to 205 mm) high. Patent pending US20150360713A1.Backcountry (2011 and up) with 6.3" (160 mm) riser block