6805 BKCoating Ceramic Bearing (25x37x7mm) - The Ultimate BB30 & Hub Upgrade
Specifically engineered as the premier upgrade for BB30 bottom brackets and high-performance hubs, the 6805 BKCoating Ceramic Bearing is the standard for cyclists seeking a real competitive edge. Experience flawless rotation and robust durability, designed to perfect your BB30 system.
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✔Flawless Rotation: G5-grade Silicon Nitride (Si3N4) ceramic balls provide a near-frictionless spin, ensuring maximum power transfer whether you're climbing or sprinting.
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✔Superior Durability: Our proprietary BKCoating creates a hardened, corrosion-resistant surface on the bearing races, essential for the high-stress environment of a bottom bracket.
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✔Precision BB30 Standard: Adhering to the exact
25x37x7mm dimensions , this bearing is the designated standard for all BB30 bottom bracket systems, guaranteeing a drop-in perfect fit. -
✔Optimized for Performance: By foregoing traditional rubber seals (2RS) in favor of the low-friction BKCoating, this bearing is optimized for raw speed and efficiency, while still offering excellent protection against the elements.
Specifications
| Item | Specification |
| Inner Diameter (ID) | 25mm |
| Outer Diameter (OD) | 37mm |
| Width | 7mm |
| Model | 6805 |
| Ball Material | Grade 5 (G5) Silicon Nitride (Si3N4) |
| Coating Technology | BKCoating Anti-Corrosion Coating |
Application & Compatibility
The primary application for the 6805 bearing in high-performance cycling is as the standard press-fit bearing for BB30 (Bottom Bracket 30mm) systems. It is the go-to choice for servicing or upgrading cranksets from brands like FSA, SRAM, and Cannondale that use the BB30 standard.
It may also be used in some hub designs. Always confirm your component's required bearing size before purchase.
Frequently Asked Questions (FAQ)
Q: What are 6805 bearings used for?
A: In cycling, their main and most well-known use is for BB30 bottom brackets. The 25x37x7mm size is specifically designed to house a crankset with a 30mm spindle directly inside a compatible frame.
Q: Is this the correct bearing for my FSA BB30 crankset?
A: Yes. The 6805 bearing is the standard size required for all BB30 specification cranksets and bottom brackets, including those from FSA.
Q: What is the difference between a 6805 and a 6805-2RS bearing?
A: A 6805-2RS has two rubber seals for protection, which adds a small amount of drag. Our 6805 BKCoating bearing forgoes these seals for maximum performance, relying on the hardened, corrosion-resistant coating on the races themselves for durability. This results in a faster, more efficient bearing.
Q: What is a BB30 bottom bracket?
A: BB30 is a widely adopted open standard for bottom brackets that uses a larger 30mm diameter crank spindle (as opposed to the traditional 24mm). It relies on two 6805 bearings pressed directly into a compatible bicycle frame, which allows for a lighter and stiffer crankset assembly.
