ACS Maindrive Headset EC34/28.6|EC34/30 Blue Model-Girder HD 3D damping adapts to pelvic

3D damping adapts to pelvic motion with minimal pressure and reduced friction Clamp Style Std Rails Color Black/Gray Defined Color Black Gender/Age Men's Length 271 Material Synthetic Saddle Cut Out No Width 181

Lower leg bleeders allow for atmospheric pressure equalization providing more usable travel and better small bump sensitivity

Wide chainline for compatibility with Full Mount rear derailleurs

Pressure Relief Valve upgrade kits available

ACS Maindrive Headset EC34/28.6|EC34/30 Blue Model-Girder HD 3D damping adapts to pelvicForged steel cups, alloy tops and cap with sealed bearings Available for 1" (25. 4mm) or 1 1 8" (28. 6mm) EC (traditional cup) applications Model Maindrive S. H. I. S. EC34 28. 6 EC34 30 Color Blue Weight 157g Size EC34 28. 6 EC34 30