The Enduro line of angular-contact headset bearings start with Black Oxide treated Chromium Steel races and then steps up to full 440C stainless steel
the micro-structural elements of this material is second to none
ABEC-3 Radial Bottom Bracket Bearing featuring 52100 High-Carbon chromium alloy races paired with grade 10 Balls with 90% fill
Trek BB90 bottom brackets require the bearing to be directly pressed into the BB shell that is often made from a material that is softer than steel
ceramic-hybrid andD-15 with ceramic or stainless balls
698 LLU MAX BO - MAX-Design, Black-Oxide, Radial, Suspension Bearing - 8mm x 19mm x 6mm sale The Enduro line of angular-contact698 LLU MAX BO MAX Design, Black Oxide, Radial Suspension Bearing 8mm x 19mm x 6mm Enduro Bearings pioneered MAX type bearings over 20 years ago for bicycles to address the challenges associated with mountain bike pivots. MAX type bearings provide 35 40% more load capacity than standard radial bearings by utilizing a special design where the maximum number of balls are inserted into the bearing, via a custom ground slot in the races. The additional