Complete integrated headset for Roubaix SL4 bikes with all sizes of lower headset bearings.

• 1-1/8 Upper Bearing: 41.8mm OD x 30.5mm ID x 8mm Thick (45x45 degree).
• 49/52cm Frame Lower Bearing: 1-1/8 - 41.8mm OD x 30.50mm ID x 8mm Thick (45x45 degree).
• 54/56cm Frame Lower Bearing: 1-1/4 - 47mm OD x 34mm ID x 7mm Thick (45x45 degree).
• 58/61cm Frame Lower Bearing: 1-3/8 - 49mm OD x 37mm ID x 7mm Thick (45x45 degree).
• 48mm OD / 10mm tall carbon headset transition cover.
• 48mm OD / 15mm tall carbon headset transition cover.
• Split alloy compression ring.
• 5mm carbon headset spacer (2 pcs.)
• 10mm carbon headset spacer (1 pcs.)