When searching for high-performance small bearings, the Easton R4 Kogellager Body 6902 Lager stands out for its precision engineering and durability. This component is favored by riders who demand smooth hub rotation and long-term reliability under various conditions.
Below you will find detailed specifications, usage guidance, and real-user insights to help you decide if this lager is the right fit for your setup.
| Specification | Details | Benefit | Value |
|---|---|---|---|
| Part Number | 6902 | Standard size reference | 6902 |
| Lager Type | Kogellager (Roller Bearing) | Higher load capacity versus ball bearings | Roller |
| Inner Diameter | 15 mm | Compatible with many hub shells | 15 mm |
| Outer Diameter | 28 mm | Fits standard hub blocks | 28 mm |
| Width | 8 mm | Compact profile for tight assemblies | 8 mm |
| Sealing | Double-sided seals | Protects against dust and moisture | Shielded |
| Material | roller-bearing rings and rollersHigh-grade steel for strength | Steel |
Understanding Kogellager Technology in Bicycle Hubs
Kogellager, or roller bearings, use cylindrical rollers instead of balls to distribute loads across a larger contact area. This design reduces point stress and supports higher forces, making them suitable for demanding riding styles.
The Easton R4 Kogellager Body 6902 Lager integrates this technology into a precision-machined component that aligns perfectly with modern hub architectures.
Performance Benefits of the Easton R4 Kogellager Body 6902
Upgrading to this lager can transform how your hubs respond under acceleration, braking, and cornering. The roller design minimizes sliding friction, which translates into smoother pedal engagement and more predictable handling.
Riders often report increased stiffness without added weight, allowing efficient power transfer while maintaining compliance over rough surfaces.
Installation and Maintenance Guidelines
Proper installation is critical to maximize the life of the Easton R4 Kogellager Body 6902 Lager. Always clean hub races and inspect for wear before fitting new bearings.
Use appropriate pressing tools to avoid damaging the races, and apply a high-quality grease compatible with steel components. Regular cleaning and re-greasing intervals help maintain consistent performance and prevent premature wear.
Compatibility Considerations
Confirm that your hub shell and axle configuration match the 15 mm inner diameter and 28 mm outer diameter specifications. This lager is designed for through-axle systems and press-fit assemblies commonly found in modern frames.
Verify rim and dropout spacing to ensure optimal preload and bearing life, especially when pairing with high-torque drivetrains or disc brake systems.
Key Takeaways for the Easton R4 Kogellager Body 6902 Lager
- Roller bearing design delivers higher load capacity and smoother operation.
- 15 mm inner diameter and 28 mm outer diameter suit most modern hub bodies.
- Double-sided seals protect against contaminants and extend service life.
- Proper installation and regular maintenance are essential for peak performance.
- Ideal for riders using disc brakes or those seeking improved power transfer.
FAQ
Reader questions
Is this lager suitable for disc brake hubs with high torque loads?
Yes, the roller design and robust steel construction handle high torque and lateral forces well, making it a strong choice for disc brake applications.
How often should I clean and re-grease the Easton R4 Kogellager Body 6902?
For regular riding, inspect and re-grease every 6 to 12 months; for frequent wet or muddy conditions, service more often to keep seals and rollers protected.
Can I install this bearing myself, or should I visit a professional shop?
Experienced riders with the right tools can install it correctly, but if you are unsure, a professional bike shop ensures proper press-fit and alignment.
Will this part fit older hub models that use cartridge bearings?
Check your hub manufacturer's specs first; in many cases an adapter or different pressing method is required for older cartridge-style housings.