Blackbearing ZS55/40 Lower Headset Bearing

The Blackbearing ZS55/40 Lower Headset Bearing is designed for riders who demand precision, stability and smooth steering performance. Crafted for semi-integrated headset systems, it ensures a secure interface between the frame and fork for confident handling on any terrain.

Optimized for 1-1/2" Forks: With a 40mm fork steerer diameter and 55mm frame diameter, this bearing fits modern frames using 1-1/2" lower headset configurations. The sizing ensures perfect alignment, improved rigidity and consistent steering control.

SHIS Standard ZS55/40 Compatibility: Engineered according to the SHIS ZS55/40 standard, it provides a direct fit for semi-integrated (Zero Stack) headsets. This makes it a reliable replacement for original bearings in high-performance road, gravel and MTB setups.

Precision-Built for Performance: Constructed from premium-grade materials, the ZS55/40 bearing ensures low friction and smooth rotation under varying loads. The precision machining enhances fit accuracy, reducing play and improving steering response.

Fully sealed against moisture and dirt, it resists corrosion and contamination, ensuring long-lasting durability. The Blackbearing ZS55/40 Lower Headset Bearing delivers a perfect combination of strength, protection and refined steering feel.

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.