The Shimano Ultegra ST‑R8160 TT brake levers are designed specifically for time trial and triathlon setups, offering integrated electronic shifting capabilities with clean aerodynamics and responsive braking. Proper maintenance ensures long-term performance, precise control, and optimal ergonomics on race day. This guide walks through installation, adjustment, troubleshooting, and performance optimization specific to the ST‑R8160 TT model.
Tools Required
- 4mm and 5mm hex wrenches
- Torque wrench (Nm scale)
- Shimano Di2 E-Tube Project app (for firmware updates and diagnostics)
- Electrical connection check tool (for Di2 systems)
- Isopropyl alcohol and clean cloth
- Shimano hydraulic mineral oil (for disc brakes)
- Shimano funnel and bleed kit
- Torque spec sheet (from Shimano tech docs)
Installation of Ultegra ST‑R8160 TT Levers
Installation of the ST‑R8160 TT levers requires attention to cockpit integration, precise torque, and correct cable/hose routing.
Begin by mounting the levers into aero [paid link] extensions using a 5mm hex wrench. Ensure the lever clamps are aligned with the bar curvature. Tighten bolts to Shimano’s recommended 6-8 Nm torque spec. These levers are compatible with both rim and hydraulic disc brake systems, but the ST‑R8160 specifically pairs with Shimano’s hydraulic disc brakes.
For Di2 integration, connect the two-wire SD300 e-tube cables to the junction port at the base of each lever. Cable routing should be concealed within aero bars, exiting near the stem or junction box. Avoid sharp bends and ensure cables click into place securely.
Adjustment for Ergonomics and Responsiveness
Fine-tuning lever position improves comfort and ensures full braking power.
The levers offer minimal adjustability due to their TT-specific design, but you can modify lever angle by slightly rotating the base clamp within the aero extensions. Set the angle so the levers are easily reachable from your aero tuck position.
For brake feel, check reach adjust settings if available and confirm lever throw feels responsive. With hydraulic setups, bleeding the brakes can enhance initial bite and modulation. Engage the lever fully and confirm pad contact occurs smoothly with no sponginess.
Routine Maintenance Procedures
Routine care extends component life and prevents braking inconsistencies.
For hydraulic systems, inspect the hose for signs of wear or leakage. Replace hoses if you notice cracking or weeping fluid. Bleed the brakes at least once per season or after any significant travel or fluid loss. Use Shimano-specific mineral oil and always dispose of old fluid properly.
Clean the levers with isopropyl alcohol to remove sweat, grime, or gel residue from race-day use. Do not use degreasers or harsh chemicals, as they can damage internal seals or Di2 ports.
For Di2 versions, check firmware updates monthly using the E-Tube Project app. Inspect e-tube connections periodically to ensure they remain secure. A loose or corroded Di2 connector can cause intermittent shifting failures.
Troubleshooting Common Set-Up Issues
Even when installed correctly, riders may encounter small issues that impact performance.
If the brake lever feels soft or has excessive travel, air is likely trapped in the system. A complete bleed will usually resolve this. If lever throw feels inconsistent across both sides, ensure both calipers are aligned and the rotor is true.
Electronic shifting inconsistencies may stem from a poor e-tube connection or outdated firmware. Re-seat the cable and check firmware versions for each connected component. Also, ensure that the lever firmware matches the derailleur firmware generation for seamless synchronization.
If the lever doesn’t return to its home position smoothly, inspect the pivot bolt and internal spring. Clean out debris and re-lubricate the pivot joint lightly using Shimano-approved grease.
Optimizing Performance for Time Trials
Customization of the ST‑R8160 TT levers allows for sharper response and reduced aerodynamic drag.
Use the Shimano E-Tube app to program multi-shift functionality or fine-tune shift speed response. This can drastically reduce time lost during high-speed gear changes. Pairing the lever with the Ultegra R8150 or Dura-Ace R9250 derailleurs offers a seamless integration of 12-speed wireless control with full disc braking.
Aerodynamic benefits can be maximized by internally routing cables through the handlebars and stem. This not only improves airflow but also protects connectors from external contamination.
For riders focused on race-day efficiency, configuring a synchronized shifting mode with a single-lever control system can simplify operation and reduce rider fatigue.
Compatibility with Other Drivetrain Components
The ST‑R8160 TT levers are compatible with Shimano’s 12-speed Di2 platform and hydraulic disc brake systems.
They integrate directly with R8100 and R9200 series derailleurs and utilize the SD300 e-tube interface. They are not compatible with older SD50 e-tube systems or mechanical derailleurs.
Brake-wise, they are engineered for Shimano flat-mount hydraulic calipers, such as BR-R8170 or BR-R9270. Using incompatible calipers or cables may lead to reduced braking performance or total system failure.
Always check the Shimano compatibility chart before pairing with junction boxes, batteries, or derailleurs to ensure stable operation.
Comparison with Similar Models
Compared to the previous generation ST-R8060, the ST‑R8160 TT levers bring a smaller, more integrated Di2 junction, refined ergonomics, and compatibility with the new 12-speed platform.
Unlike the ST‑R9180 from the Dura-Ace line, the Ultegra model offers similar performance at a lower weight and cost trade-off, with only slight differences in material finish and weight (about 15g per side).
In terms of braking performance, both Ultegra and Dura-Ace levers offer near-identical modulation and power due to the shared hydraulic system architecture.
FAQs
1. Can I use the Ultegra ST‑R8160 TT levers with a mechanical drivetrain?
No. These levers are only compatible with Shimano’s electronic Di2 systems.
2. How often should I bleed the brakes on these levers?
At least once a season or after any signs of fade, sponginess, or brake contamination.
3. Are these levers wireless like the STI versions?
No. The ST‑R8160 TT levers use a wired SD300 e-tube connection, not the wireless protocol used in road shifters.
4. Can I mix these levers with Dura-Ace derailleurs?
Yes. They are fully compatible with the 12-speed Dura-Ace Di2 derailleurs using the SD300 protocol.
5. Why is my lever not returning after braking?
This may be due to dirt in the pivot mechanism or a damaged internal spring. Clean and lubricate or replace if needed.
6. What is the weight difference between Ultegra and Dura-Ace TT levers?
Approximately 15 grams per lever, with Dura-Ace being the lighter of the two.
Conclusion
Properly maintaining your Shimano Ultegra ST‑R8160 TT brake levers ensures peak performance during critical time trial moments. Whether it’s precise installation, smooth braking, or seamless Di2 shifting, consistent upkeep and correct component pairing are key. With regular inspection and careful tuning, these levers can provide years of reliable, aerodynamic control.