The Shimano Ultegra ST‑R8160 TT is a high-performance dual control lever designed for time trial and triathlon bikes. Tailored to meet the demands of competitive riders, this model delivers precise braking and shifting integration with a clean, aerodynamic interface. The ST-R8160 TT represents Shimano’s refinement in Di2 technology and hydraulic disc braking, offering advanced performance in a compact package.
Tools Required
- 5mm and 2.5mm hex wrenches
- Torque wrench
- Shimano Hydraulic Mineral Oil
- Bleed kit (Shimano-specific)
- Clean cloths
- Isopropyl alcohol
- Shimano Di2 wiring tool (if installing shifting functions)
Installation Guidelines
Proper installation of the Ultegra ST‑R8160 TT levers ensures reliable braking and accurate electronic shifting. Start by ensuring that your base bar is compatible with internal routing to achieve clean cable management. These levers are designed for direct mount on aero [paid link] extensions or base bars with an internal clamp system.
Carefully insert the lever into the bar end, ensuring no sharp bends compromise the Di2 wire or hydraulic hose. Use a torque wrench to secure the clamp bolts to Shimano’s specified torque value (6-8 Nm). Once mounted, connect the hydraulic hose and perform an initial lever pull test to verify that the caliper pistons engage smoothly.
For Di2 models, connect the EW-SD300 wires to the respective ports and confirm signal connection through the Di2 system checker before proceeding.
Adjustment Procedure
Precise adjustment of the ST-R8160 TT levers is essential for optimal braking control and comfort. Begin by checking the lever angle, ensuring both sides are symmetrical and positioned for easy reach while in the aero tuck.
Hydraulic reach adjustment can be accessed via the set screw behind the lever pivot. This allows micro-tuning of lever distance to accommodate different hand sizes and rider preferences. Ensure no excessive travel or dead zone is present before the brake engages.
To fine-tune lever response, bleed the brakes after cutting hoses to length. Follow Shimano’s one-way bleed procedure, maintaining a clean and air-free system. After bleeding, check that the lever pressure is firm and consistent on both sides.
Maintenance and Upkeep
Routine maintenance extends the performance life of your Ultegra ST‑R8160 TT brake levers. Inspect the hydraulic fluid level every 3–6 months, depending on ride conditions. Replace mineral oil and re-bleed the system annually or after experiencing inconsistent lever feel.
Clean the lever body and contact surfaces using isopropyl alcohol to remove sweat, grime, and road debris. Avoid using solvents that may degrade rubber seals or plastic Di2 components. Periodically check for hose kinks or fraying, especially around tight bends or entry points in the bar.
Monitor Di2 wire connections for corrosion or loose fitment. If using external junctions, secure them with shrink wrap or tape to prevent movement.
Troubleshooting Common Set-Up Issues
Riders may encounter specific setup challenges when installing or using the ST-R8160 TT levers. Soft lever feel often results from trapped air in the hydraulic system—repeat the bleed process with special attention to fluid level and lever angle.
Inconsistent braking on one side may indicate unequal hose lengths or piston contamination. Inspect both calipers and rotors for signs of oil residue or glazing. Clean or replace pads as needed and perform a rotor bed-in process to restore consistent braking.
Failure to detect Di2 shifting may stem from improper wire insertion or a damaged EW-SD300 cable. Use the Shimano E-Tube Project software to diagnose and correct wiring faults.
Customization and Performance Optimization
The ST-R8160 TT levers offer several customization features to align with rider preferences and aerodynamic demands. Riders can integrate them with Shimano’s wireless unit (EW-WU111) for ANT+ and Bluetooth LE data transmission, enabling real-time gear metrics on compatible head units.
Ergonomic enhancements can be achieved by pairing with grip sleeves or custom aero extensions to improve tactile feedback. For shifting performance, map the buttons to desired shift functions using the E-Tube Project app, tailoring the interface for single-button sprint or sequential shifting.
Lever stroke, pad contact, and modulation can also be optimized by choosing different Shimano rotors (RT-MT800 vs. RT-CL800) or pad compounds, depending on terrain and braking preference.
Comparison with Similar Shimano Models
Compared to the Dura-Ace ST-R9180 TT, the Ultegra ST-R8160 TT shares nearly identical shifting and braking performance but at a lower price point and slight weight penalty. The Dura-Ace variant uses lighter materials and a more refined finish, making it preferable for professional use, while the Ultegra remains ideal for serious enthusiasts.
When compared to the previous generation ST-R8060, the R8160 offers improved ergonomics, cleaner integration with the 12-speed Di2 platform, and enhanced hydraulic performance. Its design allows for a more streamlined cockpit, thanks to slimmer lever profiles and direct Di2 integration without junction boxes.
Compatibility with Drivetrain Components
The Ultegra ST-R8160 TT levers are compatible exclusively with Shimano 12-speed Di2 systems. They require use with a compatible hydraulic disc brake caliper such as BR-R8170 or BR-R9270 and must be connected to the central battery system (BT-DN300).
They function seamlessly with Shimano’s 12-speed front and rear derailleurs (RD-R8150, FD-R8150) and can be paired with the FC-R8100 crankset. It’s essential to verify firmware updates for all Di2 components through the E-Tube Project platform to ensure system compatibility and smooth operation.
Non-compatible elements include mechanical derailleurs, rim brakes, and previous generation (11-speed) Di2 derailleurs. Attempting to pair them across platforms may result in system errors or incomplete shifting functionality.
FAQs
What is the main advantage of the ST-R8160 TT over mechanical TT levers?
The ST-R8160 TT provides electronic shifting and hydraulic braking, resulting in faster response times, lower maintenance, and better modulation under load.
Can I use the ST-R8160 TT with rim brakes?
No, this model is exclusively designed for use with Shimano hydraulic disc brake systems and cannot be adapted for rim brake setups.
Is the ST-R8160 TT compatible with older Di2 components?
It is only compatible with Shimano’s 12-speed Di2 system using the EW-SD300 wiring standard and cannot be used with 11-speed or EW-SD50 components.
Do I need to bleed the brakes when installing the ST-R8160 TT?
Yes, anytime the hydraulic hose is cut or disconnected, a proper bleed is required to ensure optimal brake performance.
How do I customize the shift button functions on the ST-R8160 TT?
Use the Shimano E-Tube Project app to remap shift button functions, such as changing which button shifts up or down, or enabling multi-shift options.
What handlebars are compatible with the ST-R8160 TT levers?
These levers fit most aero bar extensions or base bars with standard internal diameter bar-end mountings designed for TT or triathlon use.
By understanding the Ultegra ST-R8160 TT brake set technologies, riders can unlock precision control and race-ready performance with a clean, aerodynamic installation tailored for serious competition.