The new Integra II Direct Mount stems feature the same lightweight, 6-bolt design as the original Integra and Renthal have improved the structure of the stem. The Integra II uses the same C-shape clamping system as the Apex stem range, which has been increased in size to cope with the demands of top level DH racing. The use of two independent, C-shape handlebar clamps allows the stem body material to be reduced to a minimum, whilst maintaining an incredibly stiff and strong structure.The ultra-wide, 64mm handlebar clamping area increases torsional rigidity and the use of just six bolts vastly reduces overall weight. In addition, the uninterupted clamp on the underside of the handlebar eliminates stress risers found on most other clamps, which can lead to handlebar failure.The size range has also now increased to include 45mm and 50mm lengths. Both of which are available in either zero rise or +10mm rise giving you four options:45 x Zero. Length 45mm. Rise zero. Bar clamp 31.8mm.45 x +10mm. Length 45mm. Rise +10mm. Bar clamp 31.8mm. 50 x Zero. Length 50mm. Rise zero. Bar clamp 31.8mm. 50 x +10mm. Length 50mm. Rise +10mm. Bar clamp 31.8mm. All of them suit Boxxer/IS. Weights:45mm x Zero: 130g45mm x 10mm: 155g50mm x Zero: 145g50mm x 10mm: 175g