The 2026 Harley-Davidson® Low Rider® ST is engineered as a performance-focused sport-touring motorcycle built on a Softail® platform. It integrates a high-output Milwaukee-Eight® 117 engine, precision-tuned chassis geometry, electronically managed rider safety systems, and modern instrumentation. The motorcycle combines measurable power output with defined suspension travel, calibrated braking hardware, and advanced traction systems. Every specification is defined with clear performance intent, including engine displacement, torque certification, lean angle data, and drivetrain ratios.
Milwaukee-Eight® 117 High Output Engine Specifications
The 2026 Harley-Davidson® Low Rider® ST is equipped with the Milwaukee-Eight® 117 High Output V-twin engine. Displacement measures 117 cubic inches, equivalent to 1,923 cc. The bore measures 4.075 inches, and the stroke measures 4.5 inches. The compression ratio is rated at 10.3 to 1. The engine uses pushrod-operated overhead valves with hydraulic, self-adjusting lifters and four valves per cylinder.
The engine produces 114 horsepower at 5,000 rpm. Torque output is certified at 128 ft-lb at 4,000 rpm using J1349 testing methodology. This torque curve supports strong midrange acceleration and consistent throttle response. Electronic Sequential Port Fuel Injection manages fuel delivery with calibrated metering for efficient combustion.
Air intake is handled by a Heavy Breather system with a synthetic, washable exposed filter element. The exhaust configuration is a 2-into-1 system with a catalyst integrated into the header assembly. Lubrication uses a pressurized dry-sump system with an integrated oil cooler to stabilize operating temperatures during extended operation.
Fuel capacity measures 5 gallons, with a 1-gallon reserve indicated by the fuel injection warning light. The oil capacity with the filter is 5 quarts. Primary chain case capacity measures 1.25 quarts, and transmission capacity measures 1 quart. Estimated fuel economy is rated at 47 miles per gallon under city and highway testing conditions.
Transmission, Gear Ratios, and Final Drive Architecture
Power is routed through a 6-Speed Cruise Drive® transmission. Gear ratios are configured for controlled acceleration and efficient highway cruising. The overall first gear ratio is 9.311. The second gear ratio measures 6.454. The third gear ratio is 4.793. The fourth gear ratio is 3.882. The fifth gear ratio measures 3.307. The sixth gear ratio is 2.79.
The primary drive uses a chain configuration with a 34 over 46 ratio. The final drive uses a belt system with a 32 over 66 ratio. Clutch operation is mechanical, featuring a 10-plate wet clutch with assist and conventional functions. This configuration ensures predictable engagement and controlled power transfer during acceleration and deceleration.
The drivetrain components are calibrated to manage the output of the 117 cubic inch engine without abrupt engagement characteristics. Sixth gear allows reduced engine rpm at cruising speeds, supporting mechanical efficiency during extended highway operation.
Frame Construction and Geometry Configuration
The frame is constructed from mild steel tubular sections with a rectangular section backbone. Junction points use stamped, cast, and forged components that are MIG welded. Aluminum-forged fender supports reduce weight while maintaining structural rigidity. The swingarm uses mild steel tubular sections with a stamped cross member and forged axle junctions. A removable belt spacer simplifies service access.
Overall length measures 92.9 inches. Overall width is 35 inches. Overall height measures 50.8 inches. The wheelbase measures 63.6 inches. Rake angle is 28 degrees, with fork angle also set at 28 degrees. The trail measures 5.7 inches.
Static ground clearance measures 5.7 inches. Lean angle testing under J1168 standards shows 31.3 degrees of lean angle on both right and left sides. These geometry figures support directional stability at speed while maintaining controlled turn-in response.
Weight as shipped measures 686 pounds. Weight in running order measures 712 pounds. Gross Vehicle Weight Rating is 1,160 pounds. Front Gross Axle Weight Rating is 450 pounds, and rear Gross Axle Weight Rating is 730 pounds. Luggage capacity volume measures 2 cubic feet.
Seat height when laden measures 27 inches, based on a 180-pound operator weight. Seat height unladen measures 28.1 inches. These figures position the rider in a low and controlled seating profile relative to the chassis dimensions.
Suspension System and Ride Control Components
The front suspension uses a 43 mm inverted single-cartridge fork with aluminum triple clamps and a single-rate spring. Suspension travel at the front measures 5 inches. The inverted configuration increases torsional rigidity during braking and cornering inputs.
Rear suspension uses a hidden coil-over monoshock with a free piston design and a 56 mm stroke. Hydraulic preload adjustment allows ride height tuning to accommodate load variation. Rear suspension travel measures 4.4 inches.
This suspension setup is engineered to balance straight-line stability with controlled cornering performance. The defined travel range allows impact absorption without excessive chassis pitch under braking or acceleration.
Wheel, Tire, and Braking System Specifications
The 2026 Harley-Davidson® Low Rider® ST rides on Michelin® Scorcher 31 tires at both front and rear. The front tire specification is 110 over 90 B19 62H BW. The rear tire specification is 180 over 70 B16 77H BW.
Front wheel diameter measures 19 inches with a width of 2.5 inches. Rear wheel diameter measures 16 inches with a width of 5 inches. The standard wheel type is Chrome Radiate Cast Aluminum. Optional Black Radiate Cast Aluminum wheels may be available depending on the region.
Front braking uses dual 11.8-inch floating rotors with 4-piston fixed calipers. Rotor thickness measures 0.2 inches. Rear braking uses a single 11.5-inch rotor with 0.23-inch thickness and a 2-piston floating caliper. Anti-Lock Braking System is standard.
The braking hardware is sized to manage the 712-pound running weight while maintaining consistent stopping performance during repeated deceleration events.
Electronic Rider Safety and Control Systems
The motorcycle includes a suite of electronically managed safety systems. The anti-lock braking system is standard. Traction Control System is included. The Drag-Torque Slip Control System is included. The Tire Pressure Monitoring System is included.
Cornering Enhanced ABS is included and adjusts brake pressure relative to lean angle. Cornering Enhanced Traction Control System is included. The Cornering Drag-Torque Slip Control System is included.
Electronic Linked Braking is not included. Vehicle Hold Control is not included. Enhanced Lift Mitigation is not included.
Electrical Architecture and Instrumentation
Electrical power is supplied by a sealed, maintenance-free absorbed glass mat battery rated at 12 volts, 17.5 amp hours, and 310 cold cranking amps at 0 degrees Fahrenheit. Charging is managed by a three-phase 48-amp system producing 364 watts at 900 rpm and up to 624 watts at 2,000 rpm.
Starting is handled by a 1.6 kW electric starter motor with solenoid shift engagement. All lighting components are LED, including the headlamp with low beam, high beam, and signature position lamp. The tail and stop lamp is LED buffet style. Front and rear turn signals are LED bullet units.
Instrumentation includes a 4-inch analog speedometer integrated with a digital display. The display provides a gear position indicator, odometer, fuel level, ride modes, heated gear status, traction control status, ABS status, tire pressure monitoring data, cruise control status, clock, trip meter, fuel range, and tachometer indication.
A USB C-Type power outlet provides 5 volts at 2.4 amps for device charging. Auxiliary lamps are not included. The GPS system is not included. The reverse function is not included. The infotainment system is not included.
Schedule a Test Ride at Tower’s Baton Rouge Harley-Davidson®
We invite you to examine the full technical capabilities of the 2026 Harley-Davidson® Low Rider® ST at Tower’s Baton Rouge Harley-Davidson® in Baton Rouge, LA. Our team will provide a detailed walkaround highlighting the Milwaukee-Eight® 117 High Output engine specifications, drivetrain ratios, and suspension configuration. You can schedule a test ride to evaluate the 128 ft-lb torque output, 6-Speed Cruise Drive® transmission response, and cornering-enhanced safety systems. During your visit, we will review braking components, electronic rider aids, and instrumentation features in detail. Contact our dealership to arrange a test ride and assess the defined performance metrics and engineering systems of this model firsthand.
