The Harley-Davidson® CVO™ Road Glide® ST occupies a distinct position within the Custom Vehicle Operations lineup as a factory-built performance bagger developed with competition-derived engineering priorities. The Road Glide® ST designation first appeared in 2022, marking a shift toward reduced mass, increased power output, and enhanced electronic control within a touring framework. Each subsequent model year refined that direction through measurable changes in materials, drivetrain output, and rider-assist systems.
Using the 2025 Harley-Davidson® CVO™ Road Glide® ST as a technical reference point, the motorcycle demonstrates how Harley-Davidson® integrated racetrack-informed solutions into a production touring motorcycle while maintaining full street functionality. This configuration also establishes the engineering baseline for the forthcoming 2026 Harley-Davidson® CVO™ Road Glide® ST, making the 2025 Harley-Davidson® CVO™ Road Glide® ST specification set an important reference for evaluating the platform’s ongoing development.
Milwaukee-Eight® 121 High Output Powertrain Architecture
The 2025 Harley-Davidson® CVO™ Road Glide® ST is powered by the Milwaukee-Eight® 121 High Output V-twin engine, the most powerful engine installed in a production Harley-Davidson® motorcycle to date. The engine produces 127 horsepower and 145 ft-lb of torque, figures achieved through a combination of increased displacement, revised camshaft geometry, and optimized airflow.
A Screamin' Eagle® Heavy Breather intake system improves volumetric efficiency by reducing intake restriction, while a high-performance camshaft supports sustained power delivery through the upper engine speed range. The rev limit is increased to 5,900 rpm, allowing the engine to maintain output longer under acceleration compared to standard touring engines. These mechanical changes result in a broader usable powerband that supports aggressive throttle application during passing, sustained high-speed travel, and controlled acceleration out of corners.
Exhaust flow is managed through lightweight titanium mufflers that reduce overall mass while maintaining structural integrity under thermal stress. Increased exhaust efficiency supports engine breathing without introducing excessive back pressure, contributing to consistent power delivery across varying load conditions.
Drivetrain Calibration and Power Management
Power from the Milwaukee-Eight® 121 High Output engine is managed through ride mode-based electronic calibration that adjusts throttle response and traction parameters. The drivetrain is tuned to balance immediate torque availability with predictable output modulation, particularly important for a high-torque touring platform.
Electronic intervention systems manage rear-wheel slip during acceleration and deceleration events, ensuring that power delivery remains controlled under changing surface conditions. These calibrations are integrated directly with the ride modes, allowing the motorcycle’s behavior to be adjusted without mechanical changes.
Suspension Systems Engineered for Stability and Feedback
Chassis control on the 2025 Harley-Davidson® CVO™ Road Glide® ST relies on a fully adjustable SHOWA® suspension system designed to accommodate both performance riding and long-distance operation. The front suspension consists of 47 mm inverted SHOWA® forks providing 4.6 inches of travel. These forks allow independent adjustment of compression, rebound, and preload, enabling precise tuning for rider weight, riding style, and road conditions.
At the rear, dual SHOWA® remote reservoir shocks provide three inches of travel. The remote reservoir design separates oil and gas to reduce damping fade during prolonged use or raised temperatures. This configuration improves consistency during repeated high-load events such as aggressive cornering or extended highway travel with luggage.
Together, the suspension components maintain chassis stability during braking transitions, minimize pitch under acceleration, and preserve tire contact over uneven surfaces.
Brake Hardware and Thermal Management
Braking performance is supported by dual floating front brake rotors paired with Brembo® calipers. The floating rotor design improves heat dissipation and reduces the likelihood of brake fade during repeated high-speed braking events. Reduced unsprung mass at the wheels also contributes to improved suspension response and steering precision.
Brake system performance is integrated with electronic control systems that manage brake force distribution and wheel slip, enhancing stability without compromising rider input.
Lightweight Construction and Material Selection
Weight reduction is a defining design objective for the 2025 Harley-Davidson® CVO™ Road Glide® ST. A forged carbon fiber front fender replaces a traditional steel component, reducing mass while maintaining rigidity. Carbon fiber construction also resists corrosion and fatigue, contributing to long-term durability.
Cast aluminum wheels further reduce unsprung weight, improving acceleration response and directional changes. The reduction in rotational mass enhances steering input precision and contributes to overall handling efficiency. These material choices reflect a consistent focus on improving performance through measurable reductions in mass rather than cosmetic changes.
Ergonomic Geometry for Controlled Riding Input
The rider interface on the 2025 Harley-Davidson® CVO™ Road Glide® ST is configured to support active riding input while maintaining touring comfort. Tall risers combined with moto-style handlebars position the rider in a forward-biased stance that improves leverage during cornering and braking. This geometry allows for improved upper-body control without placing excessive load on the wrists or shoulders during extended operation.
A solo seat with a defined backstop provides lower-back support during acceleration while stabilizing the rider during aggressive maneuvers. Mini floorboards offer sufficient foot support without limiting lean angle, allowing the chassis to be used effectively through corners.
Aerodynamic and Structural Design Integration
The frame-mounted 2025 Harley-Davidson® CVO™ Road Glide® ST fairing contributes to high-speed stability by isolating steering input from aerodynamic load. This design reduces steering effort during crosswinds and maintains consistent handling characteristics at highway speeds. The fairing shape supports airflow management while accommodating the integrated display and audio systems.
Paint and graphic treatments serve functional identification purposes within the CVO™ lineup, with high-visibility accents applied to key powertrain components and body panels.
Digital Interface and System Control
A 12.3-inch TFT touchscreen display serves as the primary rider interface. Powered by Skyline™ OS, the display integrates navigation, system diagnostics, ride modes, and audio control into a single platform. The screen layout prioritizes readability under varying lighting conditions and provides configurable display options to suit rider preference.
Navigation functions include traffic and weather overlays, allowing route adjustments based on external conditions. Audio system integration supports clear output at sustained speeds, with controls accessible directly through the touchscreen interface.
Ride Modes and Performance Configuration
The 2025 Harley-Davidson® CVO™ Road Glide® ST offers eight selectable ride modes that adjust throttle response, traction control sensitivity, and braking intervention. Track and Track Plus modes are included to allow reduced electronic intervention in controlled environments, supporting higher-performance operation. These modes modify system thresholds rather than disabling safety features entirely, preserving baseline stability support.
The ability to switch modes allows the motorcycle’s response to align with riding conditions without mechanical adjustment.
Comprehensive Rider Safety Enhancements
Rider Safety Enhancements on the 2025 Harley-Davidson® CVO™ Road Glide® ST are designed to assist during acceleration, braking, and deceleration events. Anti-lock Braking System functionality prevents wheel lock during hard braking, while Electronic Linked Braking distributes braking force between front and rear wheels to improve stopping performance.
Traction Control System calibration manages rear-wheel slip during straight-line acceleration, while Drag-Torque Slip Control System reduces the likelihood of rear-wheel lock during abrupt downshifts or rapid throttle closure.
Cornering-enhanced versions of these systems adjust intervention based on lean angle, allowing braking and traction assistance to remain effective while the motorcycle is leaned over. Vehicle Hold Control supports controlled starts on inclines by maintaining brake pressure after the rider releases the lever. Tire Pressure Monitoring System functionality provides alerts to maintain optimal tire conditions for performance and longevity.
Touring Functionality and Operating Efficiency
Despite its performance-oriented configuration, the 2025 Harley-Davidson® CVO™ Road Glide® ST retains full touring capability. Integrated saddlebags provide storage capacity without compromising aerodynamics. Fuel efficiency is rated at 44 mpg, supporting extended travel between refueling stops.
Seat height is measured at 26.7 inches when laden, supporting stability at stops while maintaining ground clearance during operation.
Positioning Within the Harley-Davidson® CVO™ Road Glide® ST Lineage
The 2025 Harley-Davidson® CVO™ Road Glide® ST reflects cumulative refinements introduced since the model’s initial release in 2022. Increased power output, expanded electronic integration, and continued weight reduction demonstrate a clear engineering trajectory. This configuration establishes expectations for further advancement in the upcoming 2026 Harley-Davidson® CVO™ Road Glide® ST, particularly in the areas of electronic control refinement and chassis optimization.
Visit Tower’s Baton Rouge Harley-Davidson® to Schedule a Test Ride
Evaluating the 2025 Harley-Davidson® CVO™ Road Glide® ST through direct operation provides context for its mechanical and electronic integration. The interaction between the Milwaukee-Eight® 121 High Output engine, adjustable suspension, and rider safety systems becomes evident during varied riding conditions. Scheduling a test ride allows assessment of throttle response, braking stability, and ergonomic fit under controlled conditions. Those interested in experiencing this configuration firsthand can arrange a test ride through Towers' Baton Rouge Harley-Davidson® in Baton Rouge, LA, where the focus remains on understanding the motorcycle’s technical capabilities through operation rather than description.
