The Zipp SL-70 Ergo[paid link] handlebars are designed for riders seeking a balance of performance, ergonomics, and aerodynamics. Crafted from unidirectional carbon fiber, they offer excellent stiffness-to-weight ratios and a distinctive ergonomic top section. However, many cyclists eventually ask the question: Can you upgrade or modify your Zipp SL-70 Ergo handlebars to further enhance performance and comfort?
This detailed guide explores upgrade options, compatibility considerations, and best practices to ensure a perfect fit and safe setup.
Understanding the Zipp SL-70 Ergo Design
Before planning any upgrades, it’s important to understand the defining features of the SL-70 Ergo:
- Reach: 70 mm
- Drop: 128 mm
- Top Shape: Flattened, ergonomic tops for improved wrist comfort
- Material: Unidirectional carbon fiber
- Routing: Internal cable routing compatible with both mechanical and electronic drivetrains
- Clamp Diameter: 31.8 mm
These specifications make the SL-70 Ergo an ideal handlebar for endurance and performance road bikes. Its short reach allows easy transitions between hand positions, while the shallow drop keeps riders in a more controlled position during long rides.
Compatibility with Stems and Shifters
The first step when considering an upgrade is verifying compatibility with your current components. The SL-70 Ergo’s 31.8 mm clamp diameter is the industry standard, meaning it fits most modern stems. However, riders should check the following:
- Stem Material and Torque Limit: Aluminum and carbon stems have different torque recommendations. Over-tightening can damage the bar’s carbon laminate.
- Shimano, SRAM, and Campagnolo Compatibility: The bar’s ergonomics align well with all major lever designs, especially those with smaller hood profiles.
- Electronic Shifting Compatibility: Fully compatible with Di2 and eTap cabling thanks to its internal routing ports.
If you are planning to upgrade your groupset or stem, ensure that all contact points respect Zipp’s maximum clamp torque specification of 6 Nm.
When an Upgrade Makes Sense
Upgrading your Zipp SL-70 Ergo handlebars may be beneficial in the following scenarios:
- Position Optimization: You want to fine-tune your reach or drop for improved comfort or aerodynamics.
- Cockpit Integration: You plan to install an integrated stem-bar system or upgrade to a fully internal cable routing setup.
- Accessory Compatibility: You wish to mount GPS devices, lights, or aero extensions requiring a specific handlebar shape.
- Material Performance: You’re transitioning from an aluminum handlebar to carbon to reduce weight and vibration.
Because the SL-70 Ergo already represents a premium design, most upgrades focus on fit and integration, not replacing the bar outright.
Recommended Upgrade Options
While the SL-70 Ergo is a high-end model, several upgrades can enhance its performance and longevity:
1. Integrated Cockpit Systems
Pairing the SL-70 Ergo with a Zipp Service Course SL[paid link] stem or Zipp SL Sprint stem ensures ideal stiffness and aesthetic harmony. Both stems complement the bar’s clamp profile and finish, maintaining torsional rigidity.
2. Handlebar Tape and Padding
Using high-quality tape with gel or foam padding improves comfort and vibration damping. Riders seeking a firmer grip for sprinting can opt for thinner tape.
3. Internal Cable Optimization
If your frame allows, reroute cables fully internally for cleaner airflow and a more aerodynamic appearance. Zipp’s internal cable ports are designed for minimal friction and easy maintenance.
4. Custom Fit Adjustments
Small fit refinements, such as altering the rotation angle or lever positioning, can yield major comfort improvements. Always use a torque wrench[paid link] when securing levers to prevent carbon damage.
Best Practices for Upgrading and Installation
Upgrading a carbon handlebar requires precision and attention to detail. Follow these best practices to maintain safety and structural integrity:
- Use a Torque Wrench[paid link]: Apply no more than 6 Nm on stem bolts and lever clamps.
- Apply Carbon Assembly Paste: Prevents slippage and reduces required torque.
- Inspect for Cracks: Before reinstallation, examine all contact surfaces for signs of compression or delamination.
- Evenly Tighten Bolts: Tighten bolts in a cross-pattern to distribute load evenly.
- Protect the Finish: Avoid using metal tools directly on carbon surfaces; use padded clamps when mounting accessories.
Proper installation ensures longevity and safety while preserving the handlebar’s structural performance.
Common Compatibility Mistakes to Avoid
Many riders make avoidable errors when upgrading the SL-70 Ergo. Be aware of these common pitfalls:
- Using Incompatible Aerobar Extensions: The flattened tops are not suitable for clip-on aero bars unless explicitly approved by Zipp.
- Over-Tightening Stem Bolts: Exceeding torque specs can cause micro-cracks and void the warranty.
- Ignoring Cable Clearance: Poor cable routing can lead to friction and shifting inconsistency.
- Improper Lever Angle: Misalignment can cause wrist strain and compromise braking efficiency.
Avoiding these mistakes helps maintain the structural integrity of the handlebar while ensuring a proper ergonomic setup.
Comparing the SL-70 Ergo to Similar Models
When considering an upgrade, it’s helpful to understand how the SL-70 Ergo compares to other models:
| Feature | Zipp SL-70 Ergo | Zipp Service Course SL[paid link]-70 Ergo | Zipp SL-80 Ergo |
|---|---|---|---|
| Material | Carbon Fiber | Aluminum | Carbon Fiber |
| Reach | 70 mm | 70 mm | 80 mm |
| Drop | 128 mm | 128 mm | 125 mm |
| Weight | ~205 g | ~260 g | ~235 g |
| Top Shape | Flattened | Flattened | Ergonomic |
| Cable Routing | Internal | External | Internal |
If weight savings, stiffness, and vibration damping are priorities, retaining the SL-70 Ergo or upgrading to another Zipp carbon model remains the best option.
Maintenance Tips After Upgrading
After any cockpit upgrade, schedule periodic maintenance checks to ensure optimal performance:
- Monthly: Check bolt torque and inspect for cracks.
- Quarterly: Clean and reapply assembly paste to stem clamping surfaces.
- Annually: Replace bar tape and inspect internal cable condition.
These maintenance habits help extend the life of your Zipp SL-70 Ergo handlebars and maintain consistent performance across seasons.
Final Thoughts
Upgrading your Zipp SL-70 Ergo handlebars can be a rewarding process if done correctly. Whether you’re improving cockpit integration, refining fit, or reducing weight, understanding compatibility and installation best practices is essential. The SL-70 Ergo remains one of the most refined ergonomic handlebar options available, and with proper care and setup, it can deliver superior comfort, stiffness, and control for years of riding.