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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2
By keeping these parts on hand
accommodating rear wheel lengths from 130mm to 148mm boost
this unit ensures your hub operates smoothly and efficiently
Rest assured that your gear is protected and safe
as it has become Castelli's best-selling product ever
Blackbearing B4 30.15x39x6.5mm 45/45° Headset Bearing light_front By keeping these parts onDesigned with angular contact bearings, the B4 efficiently handles both radial and axial loads, enhancing stability and balance. This advanced design ensures smooth and steady steering, making it perfect for sharp turns and uneven paths. Built to Last with Chrome Steel: The B4 uses SAE52100 Chrome Steel balls and rings, ensuring exceptional durability and resistance to wear. This robust construction provides long lasting performance, allowing you to
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