The Zipp SL-70 Ergo[paid link] handlebars are designed for performance-oriented riders seeking a balance between aerodynamic efficiency and ergonomic comfort. Crafted from high-modulus carbon fiber, these handlebars provide excellent stiffness-to-weight ratio, vibration damping, and a refined ergonomic shape. Whether you’re upgrading your cockpit or fine-tuning your fit, proper installation and adjustment are crucial to achieve optimal performance and comfort.
This guide provides a complete technical walkthrough for replacing and adjusting the Zipp SL-70 Ergo[paid link] handlebars, covering preparation, fit adjustment, cable routing, torque specifications, and post-installation checks.
Tools Required
- Torque wrench[paid link] with 4 mm and 5 mm hex bits
- Carbon assembly paste
- Handlebar tape and finishing tape
- Isopropyl alcohol and clean rag
- Torque chart (from Zipp or stem manufacturer)
- Workstand for stability
Understanding the Zipp SL-70 Ergo Design
The SL-70 Ergo features a 70 mm reach and 128 mm drop, optimized for riders who prefer a compact and natural hand position. Its flattened top section supports the palms, while the 10° ramp angle ensures smooth transition from tops to hoods. The bar also includes internal cable routing channels for a clean and aerodynamic setup.
This design enhances comfort over long rides while providing precise control during sprints and descents. However, to fully benefit from these ergonomic advantages, correct installation and fit adjustment are essential.
Removing the Existing Handlebar
Before installation, safely remove your old handlebars. Start by detaching the bar tape, followed by the removal of shifters, brake levers, and any attached accessories. Loosen the stem faceplate bolts evenly, alternating between each side to prevent clamping stress. Once the bolts are fully loosened, carefully remove the old bar, taking care not to scratch the stem faceplate or damage internal cable housings.
Inspect the stem clamp area for burrs, corrosion, or residue. Clean all surfaces with isopropyl alcohol to ensure a secure and slip-free connection for the new bar.
Installing the Zipp SL-70 Ergo Handlebars
Position the Zipp SL-70 Ergo so that the logo and cable channels align symmetrically with the stem. Apply a small amount of carbon assembly paste to the stem clamping area to increase friction and reduce the required clamping torque.
Install the stem faceplate evenly, tightening each bolt in a cross-pattern. Zipp recommends a maximum torque of 5 Nm for carbon handlebars, but always verify the stem manufacturer’s specifications. Over-torquing can damage the carbon laminate, while under-torquing may lead to slippage during riding.
Ensure that the handlebar tops are level[paid link] or slightly angled downward based on your riding preference. The ergonomic top section should align parallel with the ground for a neutral wrist position when riding on the hoods.
Setting Reach and Drop for Optimal Fit
The 70 mm reach of the SL-70 Ergo allows for a compact cockpit, reducing rider stretch and improving comfort during long efforts. To optimize your setup:
- Align brake hoods so the transition from the bar ramp to hood rubber is smooth and straight.
- Verify that the 128 mm drop provides a natural lower hand position without excessive forward lean.
- Fine-tune lever placement for equal height and symmetrical alignment across both sides.
These micro-adjustments can significantly enhance control, especially when cornering or sprinting from the drops.
Cable Routing and Finishing
The SL-70 Ergo’s internal routing channels are designed for both mechanical and electronic drivetrains. Feed cables or wires through the dedicated grooves on the underside of the bar. Ensure that housing lengths are sufficient for full steering rotation without tension or binding.
Once the controls are in position and cables are secured, wrap the handlebar with fresh tape, beginning near the drops and working upward toward the stem. Maintain even tension and consistent overlap to ensure a clean finish. Secure the tape with finishing strips or electrical tape at the top.
Torque and Safety Verification
Before riding, perform a full torque check on all bolts—particularly those on the stem and control clamps. Confirm that each fastener meets the recommended specification. Turn the handlebars left and right to ensure there is no cable interference or tension.
Perform a brake and shift function test to verify that all controls operate smoothly. Apply pressure to the tops and drops to confirm stability under load. Any creaking or movement indicates insufficient torque or uneven clamping pressure.
Common Adjustment Issues
Handlebar Slippage
If the bars rotate under force, remove the faceplate, reapply carbon assembly paste, and retighten evenly to the correct torque.
Asymmetrical Hood Alignment
Use a spirit level[paid link] or straight edge across the hoods to ensure equal height. Uneven hoods can cause wrist strain during longer rides.
Excessive Reach or Drop
Consider minor stem angle or length adjustments to fine-tune the overall cockpit geometry without compromising the bar’s intended ergonomics.
Maintenance and Long-Term Care
Inspect your Zipp SL-70 Ergo handlebars every few months for signs of wear, especially around the clamping area and near the cable exits. Clean the surface using mild soap and water, avoiding solvents that may weaken the resin structure.
Reapply torque checks periodically, particularly after transport or hard impacts. Handlebar tape should be replaced every few thousand kilometers or sooner if it becomes loose or contaminated with sweat and debris.
Proper care ensures consistent performance, safety, and longevity of your carbon handlebar setup.
Compatibility and Upgrade Considerations
The SL-70 Ergo is compatible with most modern stems and shifter systems, including Shimano Di2, SRAM AXS, and Campagnolo EPS. Ensure that your stem clamp width and diameter (31.8 mm) match Zipp’s specifications.
When upgrading from aluminum bars, note that the SL-70 Ergo may offer slightly more flex damping, improving comfort but altering bar feel. Riders transitioning from deeper drop bars will also notice reduced reach and improved accessibility to controls.
Conclusion
Replacing or adjusting your Zipp SL-70 Ergo handlebars is a precise but highly rewarding process that can significantly improve comfort, aerodynamics, and overall bike handling. Following correct torque procedures, ergonomic alignment, and maintenance practices ensures your cockpit remains safe, efficient, and optimized for performance.
By investing time in proper installation and setup, riders can fully experience the engineering excellence behind Zipp’s SL-70 Ergo design—balancing control, comfort, and speed across every ride.