Ritchey Comp Trail Stem - 35mm Clamp 35mm BlackRitchey Comp Trail Stem 35mm Clamp 35mm Rise Black. The Ritchey Comp Trail Stem represents our first stem specifically designed for todays 5 6 travel trail bikes using wide bars. More than just a beefed up version of our other stems with the Trail stem we revised the clamp to fit a wider variety of riser bar bends still packing a dramatic increase in stiffness and strength over competitors designs. The extra wide bar clamp takes stiffness to the next