Of course. Here is a full article about the Harley-Davidson Tri Glide Ultra, written in the requested style and format.
The 2017–2024 Harley-Davidson Trike Milwaukee-Eight 114 (FLHTCUTG Tri Glide Ultra) represents a modern era for Harley-Davidson’s flagship three-wheeled touring motorcycle. As a cornerstone of the company’s Grand American Touring family, the Tri Glide Ultra is engineered to provide maximum comfort, stability, and storage for long-distance two-up riding. This period is defined by the introduction of the advanced Milwaukee-Eight engine and a host of technological upgrades that significantly enhanced the performance and rider experience compared to its predecessors.
The most substantial change marking the beginning of this generation in 2017 was the replacement of the long-serving Twin Cam engine. The previous Tri Glide models were equipped with the High Output Twin Cam 103 engine, an air-cooled V-Twin known for its classic Harley-Davidson character. The new Milwaukee-Eight engine, introduced initially as a 107 cubic inch (1,753 cc) variant, offered a major leap forward. It featured four valves per cylinder, a single chain-driven camshaft, and a refined counter-balancing system, resulting in a smoother idle and reduced vibration at highway speeds. Furthermore, the engine was designed for superior heat management, utilizing precision oil or liquid cooling for the cylinder heads, which directed thermal comfort away from the rider and passenger—a significant improvement for slow-moving traffic and warmer climates.
Model Evolution and Key Features of the Tri Glide Ultra
Over its production run from 2017 to 2024, the Tri Glide Ultra saw several key enhancements that refined its capabilities as a premier touring machine. These upgrades focused on powertrain performance, rider safety technology, and infotainment systems, solidifying its position at the top of the three-wheeled market.
Powertrain: The Milwaukee-Eight 114
While the 2017 and 2018 models were powered by the Milwaukee-Eight 107, a pivotal upgrade occurred in 2019 when the larger Milwaukee-Eight 114 (1,868 cc) became the standard engine. This larger displacement V-Twin delivered a noticeable increase in torque, providing stronger acceleration from a standstill and more authoritative passing power on the highway. For a machine with a substantial curb weight, this added performance was a welcome improvement, allowing the Tri Glide to carry a rider, passenger, and a full load of gear with greater ease. The engine is paired with a 6-Speed Cruise Drive transmission and an electric reverse gear, which is essential for maneuvering the trike in tight spaces.
Chassis and Suspension
The Tri Glide Ultra is built on a frame designed specifically to handle the unique stresses of a three-wheeled vehicle. It provides a stable and confidence-inspiring ride. The front suspension features a 49mm dual bending valve fork, delivering linear damping characteristics for a smooth and controlled ride over various road surfaces. The rear suspension system underwent a significant upgrade during this period, moving to a premium emulsion shock system with a tool-free preload adjuster. This allows the rider to easily adjust the suspension for the added weight of a passenger or luggage without needing any tools, optimizing both comfort and handling.
Technology and Rider Safety
A major technological leap for the Tri Glide Ultra was the introduction of the Boom! Box GTS infotainment system, which replaced the earlier 6.5GT unit. The GTS system features a modern, smartphone-like interface with a durable Gorilla Glass touchscreen, faster processing speeds, and Apple CarPlay compatibility.
Even more significant was the availability of Harley-Davidson’s RDRS Safety Enhancements (formerly known as Reflex Defensive Rider Systems). This suite of electronic aids utilizes an Inertial Measurement Unit (IMU) to provide sophisticated, lean-angle-aware rider assistance. Key features include:
Cornering Enhanced Antilock Braking System (C-ABS)
Cornering Enhanced Traction Control System (C-TCS)
Drag-Torque Slip Control System (DSCS)
* Tire Pressure Monitoring System (TPMS)**
These systems work together to provide the rider with greater control during acceleration, deceleration, and braking, especially in adverse conditions.
Touring Amenities
True to its “Ultra” designation, the model is fully equipped for cross-country travel. The distinctive Batwing fairing provides excellent wind protection, while the integrated trunk and injection-molded Tour-Pak luggage carrier offer a combined 6.8 cubic feet of storage space. The seating is designed for all-day comfort for both rider and passenger, with the passenger enjoying a full backrest and armrests. Full-length footboards, electronic cruise control, and powerful Daymaker LED lighting complete the premium touring package.
Specifications Table
| General | |
| Brand | Harley-Davidson |
| Model | Tri Glide Ultra |
| Model Code | FLHTCUTG |
| Model Year | 2017–2024 |
| Type | Touring Trike |
| Gross Vehicle Weight Rating | 1,250 lb. (567 kg) |
| Maximum passengers | 2 |
| Performance | |
| Max. torque | 121 ft-lb (164 N•m) / 3,250 RPM |
| Lean Angle, Right (deg.) | 32 |
| Lean Angle, Left (deg.) | 32 |
| Size | |
| Length | 105.1 in. (2,670 mm) |
| Width | 55.3 in. (1,405 mm) |
| Height | 56.7 in. (1,440 mm) |
| Wheelbase | 65.7 in. (1,670 mm) |
| Seat height (laden) | 27.1 in. (688 mm) |
| Ground clearance | 4.9 in. (125 mm) |
| Weight (in running order) | 1,243 lb. (564 kg) |
| Engine | |
| Type | Milwaukee-Eight 114, 45° V-Twin, Air and Oil-Cooled |
| Displacement | 114 cu in (1,868 cc) |
| Bore × Stroke | 4.016 in. × 4.5 in. (102 mm × 114 mm) |
| Compression ratio | 10.5:1 |
| Starting system | Electric starter |
| Fuel supplying system | Electronic Sequential Port Fuel Injection (ESPFI) |
| Exhaust | 2-1-2 dual exhaust with tapered mufflers |
| Oil capacity (with filter) | 5.2 qt (4.9 L) |
| Transmission | |
| Transmission type | 6-Speed Cruise Drive, with electric reverse |
| Clutch type | Wet, multi-plate, assist & slipper |
| Driving system | Belt drive |
| Primary reduction ratio | 1.353 (46/34) |
| Final reduction ratio | 2.188 (70/32) |
| Gear ratios | 1st: 10.534; 2nd: 7.302; 3rd: 5.423; 4th: 4.392; 5th: 3.741; 6th: 3.157 |
| Chassis | |
| Tire size (Front) | MT90B16 72H |
| Tire size (Rear) | P215/45R18 83T |
| Rim type | Cast Aluminum |
| Capacity of fuel tank | 6 gal (22.7 L) |
| Fuel consumption | 42 MPG (5.6 L / 100 km) |
| Brakes | 32 mm, 4-piston fixed front, 36 mm piston integrated park brake rear |
| Electric | |
| Battery | Sealed, maintenance-free, 12V, 28-amp/hour, 405 cca |
| Headlight | Daymaker LED Headlamp |
| Infotainment | Boom! Box GTS with Color Touchscreen |
| Suspension | |
| Front Fork | 49mm dual bending valve |
| Front travel | 4.6 in (117 mm) |
| Rear Shocks | Premium standard height hand-adjustable rear suspension |
| Rear travel | 3 in (76 mm) |
