FSA Headset Bearing MR031 - (ACB IS-2-138, MR031S)

Inner x Outer x Depth (mm): 37 x 49 (48.9mm) x 6.5
Inch Dia: 1-3/8”
Angle / Chamfer (Deg): 36 / 45
Bearing ID: 37mm
Bearing OD: 49mm (sometimes listed as 48.9mm)
Bearing Thickness: 6.5mm
Internal Angle: 36 Degrees
External Angle: 45 Degrees
Fits Many Cervelo Road Bikes – Lower Bearing also known as: 160-6753, IS-2-138, ACB6806CC and HD 1446 K. Stock may be FSA or BBB Branded. See ‘ACB49H6.5K’ as a direct alternative to this FSA product.