The Campagnolo Bora One hub is a precision-engineered component known for its durability, responsiveness, and efficiency. However, maintaining peak performance requires proper bearing service—particularly because Bora One hubs[paid link] use Campagnolo’s high-quality cup-and-cone bearing system, which demands accurate adjustment and regular care. This guide provides an expert walkthrough on how to service, adjust, and maintain the bearings in your Bora One hubs[paid link] for optimal performance and longevity.
Tools Required
- 5mm and 17mm cone wrenches
- Torque wrench[paid link] with 5–20 Nm range
- Small pick or bearing removal tool
- High-quality bicycle grease (Campagnolo or lithium-based)
- Degreaser and lint-free cloth
- Bearing press (if replacing bearings)
- Replacement Campagnolo steel or ceramic bearings (as applicable)
Understanding the Bora One Bearing System
The Campagnolo Bora One hub employs a cup-and-cone bearing system, unlike many sealed cartridge systems found in competing wheelsets. This design allows for micro-adjustments to bearing preload and easier servicing without full replacement. The system uses steel or CULT ceramic bearings (depending on model version), which spin within precisely machined cups integrated into the hub shell.
The main advantage of this system is tunability: riders can finely adjust rolling resistance and eliminate play without compromising bearing life. However, it also means that improper adjustment or contamination can lead to drag, wear, or rough bearing feel.
When to Service Your Bora One Bearings
Campagnolo recommends inspecting the Bora One hub bearings every 5,000–7,000 km under normal riding conditions, or sooner in wet or gritty environments. Service is also necessary if you notice any of the following:
- A gritty or rough sensation when spinning the wheel
- Side-to-side play in the hub
- Reduced coasting speed or resistance when free-spinning
- Audible clicking, grinding, or metallic noises
- Excessive drag or tightness after wheel installation
Early detection prevents irreversible cup or cone wear—an expensive and complex repair.
Disassembly and Preparation
Before starting, remove the wheel from the bike and take off the quick-release skewer. Wipe the hub exterior clean to prevent contaminants from entering the bearings during disassembly.
- Rear Hub: Remove the freehub body by loosening the non-drive side cone locknut using a 17mm cone wrench. Hold the axle steady with a 5mm hex key[paid link]. Once loosened, slide the axle out carefully.
- Front Hub: Similar procedure—remove the end cap and unscrew the cone locknut from one side to release the axle.
Keep track of the order of washers, spacers, and cones. Campagnolo hubs are precisely machined, so reassembly in the correct sequence is essential.
Cleaning and Inspection
Once disassembled, carefully remove the bearings using a small pick or extraction tool. Clean each component using a mild degreaser. Inspect the following parts closely:
- Bearings: Replace any that feel rough, have visible pitting, or show corrosion.
- Cups and Cones: Look for wear rings or dull spots. Minor marks can be polished out, but deeper scoring indicates replacement.
- Seals and Dust Covers: Ensure they’re free of tears or distortion.
Allow all parts to dry completely before greasing.
Greasing and Bearing Installation
Apply a thin, even layer of high-quality grease inside the bearing cups. For CULT ceramic bearings, use Campagnolo’s proprietary light oil instead of grease, as grease can restrict their ultra-low friction performance.
Seat the bearings carefully into the cups. Insert the axle and reinstall cones, washers, and locknuts in the same order as removal. Avoid overtightening—bearing adjustment is performed later.
Adjusting the Bora One Bearing Preload
Proper preload is crucial to achieving smooth operation and long bearing life. The Bora One hub uses micro-adjustment locknuts to fine-tune tension.
- Tighten the cone until slight resistance is felt while rotating the axle.
- Gradually back off the cone by 1/8 turn to relieve excess preload.
- Hold the cone in place and secure the locknut using the torque wrench[paid link] to 8–10 Nm.
- Spin the axle—there should be no play, but it should rotate freely and smoothly.
If the hub feels tight or rough, loosen slightly and retest. Small adjustments make a significant difference with Campagnolo hubs.
Reassembling and Final Testing
Reinstall the axle end caps and ensure all parts are secure. Mount the wheel back onto the bike and tighten the quick-release skewer with moderate pressure. Over-tightening the skewer can affect bearing preload, so always check for free rotation after installation.
Spin the wheel by hand. It should run smoothly without lateral play. If there’s any side movement, recheck preload settings.
Common Bearing Service Mistakes to Avoid
Several recurring errors can compromise Bora One hub performance:
- Over-greasing: Excess grease attracts dirt and can create drag.
- Over-tightening preload: Causes premature wear and poor rolling efficiency.
- Mixing up components: Campagnolo parts are side-specific; reversing cones or spacers can lead to misalignment.
- Using incorrect grease: Always use a light, high-quality product designed for precision bearings.
- Neglecting freehub service: The freehub mechanism shares the same lubrication environment; clean and re-lube it during bearing service.
Avoiding these issues ensures long-term hub performance and protects the investment in a high-end wheelset.
Performance Optimization Tips
For riders seeking maximum smoothness and longevity:
- Upgrade to CULT ceramic bearings if your Bora One uses standard steel races. They reduce friction and extend service intervals.
- Check hub alignment during reinstallation to ensure the wheel sits perfectly centered.
- Keep seals clean by wiping them after every wash or wet ride.
- Use consistent torque on locknuts and quick releases to maintain preload accuracy.
Routine attention to these details preserves the Bora One’s signature responsiveness and coasting ability.
Signs You Need Professional Service
While Bora One hubs are designed for home maintenance, some issues warrant professional inspection:
- Persistent play even after proper preload adjustment
- Scoring or pitting in the hub cups
- Deformed or seized cones
- Damaged freehub engagement mechanism
A certified Campagnolo technician can resurface cups or replace internal parts using factory tools, restoring full hub integrity.
Conclusion
Regular bearing service on the Campagnolo Bora One hub ensures that this high-performance component continues to deliver the smooth, precise, and durable ride it was engineered for. With careful disassembly, cleaning, lubrication, and precise preload adjustment, you can maintain optimal rolling efficiency for thousands of kilometers. Proper maintenance not only prevents wear but also enhances the signature responsiveness that defines every Campagnolo wheelset.