ProTaper ATAC Stem - 50mm 31.8mm Clamp +/-5 1 1/8" Aluminum Limited Edition Turquoise ModelNumber=K1306 The Modular Valve System (MVS)

The Modular Valve System (MVS) tube allows you to easily customize your bike

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Mountaineering-inspired adjustable closure for the perfect fit

ProTaper ATAC Stem - 50mm 31.8mm Clamp +/-5 1 1/8" Aluminum Limited Edition Turquoise ModelNumber=K1306 The Modular Valve System (MVS)ProTaper ATAC Stem 50mm 31. 8mm clamp Limited Edition Turquoise. The ATAC is back. One of the oldest names in the high end stem game has returned. And this time its all blinged out with titanium hardware and a fresh laser etched finish. Aluminum construction with Titanium Hardware Rise: + 5 degrees Clamp Diameter: 31. 8mm TECH SPECS Bar Clamp Diameter (mm) 31. 8 Color Limited Edition Turquoise Defined Color Blue Length 50 Material Aluminum S. H. I. S.