Headset bearing 30.15 × 41.8 × 7 mm for KuKirin G3

Sealed bearing for smooth handlebar rotation

The headset bearing features metal rings and a red seal. The nominal size of 30.15 × 41.8 × 7 mm defines the inner diameter, outer diameter, and height of the bearing.

Features and fitment

• Model: KuKirin G3.
• Bearing with red seal; 30.15 mm inner diameter, 41.8 mm outer diameter, 7 mm height.

Approximate dimensions

• Inner diameter of bearing: approximately 30.1 mm, nominally 30.15 mm.
• Outer diameter: 41.8 mm.
• Thickness: 7 mm.

When selecting, verify the shape of the bearing seats, not just the diameters. Stiff steering or play are reasons to inspect the bearing, but incorrect headset preload should be ruled out first.

Headset assembly overhaul

• Check for play or stiffness along with adjustment and bearing surfaces. Replace damaged bearings without striking the rolling elements.
• Clean the seat and assemble the parts in the correct order. Apply force to the race that fits into the seat when inserting, and observe the prescribed lubrication.
• After adjustment, check for smooth handlebar rotation and absence of play. Overtightening will not fix a worn bearing.