2018 Polygon Collosus N9 XX1 Headset Bearing Kit Wilier Aluminum alloy construction with comfortable

Aluminum alloy construction with comfortable handle and lightweight design

Black Oxide anti rust protection

These are precision milled cups packed with high grade grease

the Exaform has features that surpass rival posts at twice the price

and 6 pin bottom brackets16mm wrench tool - Undo 2 wrench flat bottom bracket22/23mm 2 x slots - Undo fixed cup bottom bracket with wrench sidesThis is similar to the Park Tool HCW-4

2018 Polygon Collosus N9 XX1 Headset Bearing Kit Wilier Aluminum alloy construction with comfortableComplete replacement headset bearings for this bicycle. 1 x "official FSA" upper bearing 1 x "Rad Bearing" lower bearing correct for the bicycle headset