ProTaper ATAC Stem - 70mm 31.8mm clamp Black/White Model=Two-Bolt Seatpost Best fit for feet with

Best fit for feet with low to medium arches that may not tolerate maximum support

200 pound rider weight limit

30% lighter than conventional freecoaster hubs

Shimanos XTR M9120 Enduro-style hydraulic disc brake system increases brake rigidity for greater bike control and optimizes braking performance

Shimanos CENTER LOCK mounting system makes installing and removing rotors quick and easy thanks to the spine mount and lock ring design

ProTaper ATAC Stem - 70mm 31.8mm clamp Black/White Model=Two-Bolt Seatpost Best fit for feet withProTaper ATAC Stem 70mm 31. 8mm clamp Black White. 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 Black White Defined Color Black Length 70 Material Aluminum S. H. I. S. Stem Clamp Diameter 28. 6