The Leatt Gravity 4. 0 Stem holds one of the lowest stack heights on the market at 27mm, opening up spacer range on bikes with short or over-cut steerer tubes. A forged and CNC-machined aluminum body keeps the stem light without sacrificing strength, and a zero-gap faceplate clamps evenly for a secure bar hold. Two clamp diameters and two lengths let the cockpit be tuned to fit the way we ride. What Our Gearhead(R) Experts Are Saying:"I fit this stem on a build with a steerer tube that left almost no room to work with, and I still got the bar height exactly where I wanted it. A taller stem would have forced a compromise I didn't want to make."