ACROS a03 Bearing Set for IS52 / IS52 ICR Headsets

The fully integrated ACROS IS headset with integrated cable routing (ICR) combines robust stainless steel angular contact ball bearings with sophisticated gaskets. The result: long-lasting performance, minimal maintenance, and a more relaxed ride on your bicycle. For more information on compatibility, check out the headset finder on the ACROS website. Technical Specifications: - Steerer tube top: 1 1/8" (28.6 mm) bottom: 1.5" (40 mm) - Upper angular contact ball bearing: 42 × 52 × 7 mm – 45°/45 - Lower angular contact ball bearing: 40 × 52 × 7 mm - 45°/45 - Stainless steel ball bearings