Giant Defy Advanced Pro Headset Bearing Kit headset-bearing-kit-ktm-revelator-2012-esi5365050 For Ribble Ultra SL Bikes

For Ribble Ultra SL Bikes

Suits both Carbon and Alloy frame bikes

For Specialized Venge Bikes

For Mondraker Level Alloy Bikes

Giant Defy Advanced Pro Headset Bearing Kit headset-bearing-kit-ktm-revelator-2012-esi5365050 For Ribble Ultra SL BikesThis listing includes both the upper and lower headset bearings, two bearings included in sale. For Giant Defy Advanced Pro bikes, compatible with all model years. Upper Bearing MR136 Lower Bearing MR137 GCR15 High Carbon Chromium Bearings: Chromium offers a corrosion resistance to the bearing, allowing you to get more use out on the trails and less time in the workshop changing bearings again due to rust and seizing. Buna NitrileRust Resistance