HDC-0011 - 36x1.5" Sealed AL Crown Race The inner guide inserts simply

The inner guide inserts simply snap-in to keep everything straight while installing and removing BB cups

Though it is slightly softer than our standard 52100 chromium steel used in most of our bearings

The threaded interface where our collets attach to the BRT-222 utilizes a British Standard Whitworth (BSW) 1/2"-12 thread specification

Our bearings are always engineered with deepest groove races possible to accommodate the largest balls possible and feature dual-lip seals that ride in a micro-groove creating a full labyrinth to provide superior protection against the elements

HDC-0011 - 36x1.5" Sealed AL Crown Race The inner guide inserts simplyHDC 0011 Standard Profile 36x1. 5" Sealed AL Crown Race Medium stack (2. 85mm) 1. 5 inch aluminum fork crown race for 36 inner chamfer headset bearings, like ACB 6808, featuring an NBR seal.