Ai-25 SI reducer headset, 1.5" - 1-1/8" - red

Meso series 1.5" and 1.5" reducer headsets designed for DH/FR use. Reducer headsets allow the use of a 1 1/8" steerer with a 1.5" headtube. Include stainless angular contact bearings with a specially shaped steel reinforced seal for reduced bearing contamination. Ai-25 SI: Semi-Integrated headset puts the bearings inside the headtube for reduced stack height (16.0mm) . Hand built in Renningen, Germany.