The Campagnolo Bora One hubs [paid link] are renowned for their precision engineering, smooth rolling efficiency, and long-term durability. However, even the best hubs can underperform or fail prematurely if installed or maintained incorrectly. Many riders inadvertently make small yet costly mistakes that lead to roughness, play, or premature wear. This guide outlines the most common errors made with the Bora One [paid link] hub system—and how to avoid them for optimal performance and longevity.
Understanding the Campagnolo Bora One Hub System
Campagnolo Bora One hubs [paid link] are built with high-grade steel bearings (or ceramic options in certain versions) and a lightweight aluminum shell. The front hub runs on a simple, low-friction design, while the rear hub uses a freehub body that engages through Campagnolo’s signature pawl and spring mechanism.
Both front and rear hubs are adjustable via micro cup-and-cone bearing preload systems, a hallmark of Campagnolo engineering. This design allows for ultra-fine tuning of bearing tension—when done correctly. However, small mistakes here can lead to drag, noise, or premature bearing wear.
Incorrect Bearing Preload Adjustment
One of the most frequent and costly mistakes involves over-tightening the bearing preload. Campagnolo’s cup-and-cone system is designed for minimal contact pressure.
When preload is excessive, it forces the bearings against their races, creating friction that accelerates wear and reduces rolling smoothness. On the other hand, a preload that’s too loose allows side-to-side play, which can damage the bearing seats and compromise wheel tracking.
To avoid this issue:
- Always adjust the preload with the quick release (QR) closed, as clamping force slightly alters bearing tension.
- Rotate the axle during adjustment—smoothness without lateral play indicates correct tension.
- Avoid using thread-locking compounds on the adjusting collar; Campagnolo does not recommend it.
Improper Freehub Maintenance
Another common oversight involves neglecting the freehub body. The Bora One [paid link]’s freehub requires periodic cleaning and lubrication—especially in wet or dusty environments.
Riders often make two mistakes:
- Over-lubrication – Excess grease can interfere with pawl engagement, causing slipping or delayed engagement under power.
- Under-lubrication – A dry freehub leads to noisy operation and accelerated spring wear.
To maintain optimal function:
- Clean the freehub with isopropyl alcohol and apply a light, high-quality hub oil (not heavy grease).
- Inspect the pawl springs for tension and replace them if they feel weak or irregular.
Incorrect Installation of End Caps and Axle Spacers
During wheel installation or bearing service, improper placement of end caps and axle spacers can lead to misalignment. This often results in uneven bearing loading or contact between the freehub and frame dropout.
Each Bora One hub uses specific orientation and spacing. Mixing up parts—even slightly—can lead to binding, noise, or dropout wear.
To prevent this:
- Confirm that all end caps are seated fully and symmetrically.
- Verify that the hub’s overall width matches your frame spacing (100 mm front / 130 mm rear).
- Never force the wheel into the dropouts if resistance is felt.
Using Non-Campagnolo Quick Releases
The Bora One hub’s preload calibration is designed specifically around Campagnolo quick releases, which apply a defined closing pressure. Using aftermarket or non-Campagnolo skewers can alter the clamping force, subtly changing bearing tension.
This often causes micro-preload shifts that lead to increased rolling resistance or noise. For the most accurate performance, always use Campagnolo’s original QR skewers or those with equivalent cam geometry and tension characteristics.
Ignoring Routine Bearing Service
Despite Campagnolo’s exceptional bearing quality, routine service is essential to maintain performance. Many riders skip this step, assuming sealed bearings don’t require attention. However, the Bora One’s design allows for re-greasing and inspection—a key advantage.
Failure to service bearings every 5,000–7,000 km can lead to:
- Pitted races
- Contaminated grease
- Corrosion in humid environments
For best results, clean and re-grease the bearings with Campagnolo’s recommended waterproof grease. Ensure that the seals are reinstalled correctly to maintain dust and water resistance.
Mixing Drivetrain Components Without Checking Compatibility
Campagnolo’s Bora One hubs are available in both Campagnolo and Shimano freehub body configurations. Installing the wrong freehub or cassette spacing leads to shifting inaccuracies and potential drivetrain misalignment.
When switching drivetrains, always confirm:
- The freehub type matches your cassette system.
- The axle body spacing remains correct after conversion.
- The cassette is torqued to manufacturer specification to avoid micro-movement.
Using incompatible cassettes or poorly fitted freehubs may also damage the ratchet system over time.
Neglecting Hub Shell Inspection
Cracks, oxidation, and surface damage to the hub shell or flange area can go unnoticed until catastrophic failure occurs. Because the Bora One hubs use lightweight materials, periodic visual inspection is vital.
Look for:
- Small hairline cracks around spoke holes.
- Signs of corrosion around bearing seats.
- Any deformation caused by over-tensioned spokes.
These issues often result from improper wheel building or exceeding spoke tension limits. A professional mechanic should inspect and re-tension wheels to Campagnolo’s recommended specifications.
Overlooking Rear Hub Axle Alignment
Incorrect axle alignment, typically after improper bearing replacement or rough handling, leads to poor drivetrain alignment and increased wear on the freehub body. The Bora One axle must remain perfectly straight to ensure smooth operation.
Always check the axle with a straight edge during reassembly and replace it immediately if any bending or damage is detected.
Failing to Secure the Locknut After Adjustment
Once bearing preload is set, the locknut must be firmly secured. Some riders forget this critical step, allowing the adjustment collar to rotate during rides. This subtle shift can lead to a progressive loss of preload, creating play in the bearings.
Ensure the locknut is torqued to Campagnolo’s specification while holding the preload adjuster in place to maintain correct bearing tension.
Conclusion
The Campagnolo Bora One hub system offers world-class performance when maintained and installed correctly. However, small mistakes—such as incorrect preload, neglected freehub service, or improper part alignment—can significantly compromise its performance and lifespan.
By following Campagnolo’s guidelines for setup, adjustment, and maintenance, riders can preserve the silky-smooth feel and legendary durability these hubs are known for. Avoiding these costly errors ensures every pedal stroke remains efficient, quiet, and reliable for years to come.