Zipp Service Course SL-OS Stem - 90mm | +/-6

Is the Zipp Service Course SL-OS Stem Right for You?

The Zipp Service Course SL-OS Stem is machined from 7075 aluminum for a combination of low weight and high stiffness that punches well above its price point. The oversized 31.8mm clamp pairs with standard 1-1/8" steerer tubes, making it a versatile fit for most modern road and gravel bikes. At 90mm with a +/-6° rise, it gives riders a clean cockpit geometry without sacrificing steering precision or responsiveness under hard efforts.

Built for riders who want Zipp cockpit quality at an approachable price, the Service Course SL-OS Stem features a four-bolt faceplate for secure, even bar clamping and straightforward installation. Available in multiple lengths to match your fit, this stem works equally well for racers dialing in an aggressive road position and endurance riders optimizing comfort over long miles. It is a reliable, no-compromise cockpit upgrade that delivers a direct connection between bar and fork.