Race face aeffect r 35mm stemthe aeffect r 35mm stem has a tough and solid design and is perfect for use on everything from fast single track to more aggressive all mountain and enduro riding it features a 0 rise making it ideal for use on modern geometry seen on newer mtbs that have slacker head angles durability has been well accounted for too as the aeffect rs interlocking clamp design disperses impact shocks into the body of the stem away from the bolts and the bar machined from 606