Spank Split 35 Stem - 35mm 35 Clamp +/-0 1 1/8" Aluminum BlackSpank Split 35 Stem 35mm 35 Clamp + 0 1 1 8" Aluminum Black. Highly weight optimized single crown stem ideal for Enduro applications with 31. 8mm handlebars Human Factor Design features micro increment size options tuned to fit any rider size and style human. Human Factor cockpit setup index facilitates tuning of upsweep and backsweep Ultra short stack height and true zero degree rise Chamfered barclamp to reduce stress risers and increase fatigue