Zipp Service Course Stem – AL6061 – 31.8mm – ±6° – 110mm – Black

The Zipp Service Course stem is a road stem built around strength, stiffness, and clean integration rather than extreme weight savings. It uses AL6061 aluminum and updated faceplate and body geometry to deliver a solid front-end feel with straightforward installation. This stem is commonly chosen for road builds where reliability and precise steering matter more than chasing marginal weight reductions. Compared to ultra-light stems, the Service Course prioritizes stiffness and consistency under load. Key Features AL6061 aluminum construction for strength and durability Updated faceplate and body geometry for improved stiffness Clean, smooth exterior lines to match modern road frames Designed to balance strength and weight Approximate weight: 130g (100mm reference) Compatibility & Use Notes Intended for road bike applications Fork steerer diameter: 1-1/8" Handlebar clamp diameter: 31.8mm Length: 110mm Angle: ±6° Stack height: 41mm Compatible with standard round 31.8mm handlebars Service / Ownership Context As with any stem, correct torque on both the steerer clamp and faceplate bolts is critical. Even tightening across the faceplate helps prevent bar damage and ensures consistent clamping force. Recheck bolt torque after initial rides. Fit & Use Signals Chosen for road bikes using 31.8mm handlebars and 1-1/8" steerers Good fit when stiffness and steering precision are priorities Appropriate for endurance and performance road setups Not intended for MTB or oversized bar standards Common replacement when adjusting reach without changing bar height