Ritchey 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 level fits most riser bars and ensures plenty of confident control out on the trail.