1st gear drive flange CNC-machined from tough Swiss 7075 T6 aluminum Includes factory-pressed (non-replaceable) top-quality German one-way bearing, hand-ground for optimum running accuracy and energy. The one-way bearing must certanly be frequently serviced, cleaned, and oiled (we suggest making use of # 106231 HUDY One-way Lube). Designed to be properly used with brand new small 2 rate.