SPANK Spoon 318 Stem - 31.8 Clamp DiameterStrong yet competitively lightweight alloy single crown stem for all disciplines. Unique style, modern geometry, and rock solid construction, without the heavy price tag Dial your fit with micro increment size options, tuned to fit any rider size and style Cockpit setup index lasered onto stem helps with tuning of upsweep and backsweep Ultra short stack height and true zero degree rise Chamfered bar clamp to reduce stress risers and increase fatigue