Harley-Davidson Road King Classic - 2018 Specifications and Reviews

The 2018 Harley-Davidson Road King Classic is an iconic cruiser designed for riders seeking classic American styling with modern reliability. Its lightweight frame, comfortable seating position, and accessible 715mm seat height make it ideal for both experienced and newer riders. Known for its timeless chrome detailing, windshield comfort, and smooth 6-speed transmission, it delivers authentic cruiser character for highway touring and leisurely rides.

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General information

CategoryTouring
Year2018
ModelHarley-Davidson Road King Classic
 
 

Engine and Transmission Specifications

Exhaust systemChrome, 2-1-2 dual exhaust with tapered mufflers
Greenhouse gases113.7 CO2 g/km. (CO2 - Carbon dioxide emission)
Fuel consumption4.90 litres/100 km (20.4 km/l or 48.00 mpg)
DrivelineChain, 34/46 ratio primary drive
ClutchMulti-plate with diaphragm spring in oil bath
Transmission type,final driveBelt
Gearbox6-speed
Cooling systemAir
Lubrication systemDry sump
Fuel controlDouble Overhead Cams/Twin Cam (DOHC)
Fuel systemInjection. Electronic Sequential Port Fuel Injection
Bore x Stroke100.0 x 111.1 mm (3.9 x 4.4 inches)
Compression10.0:1
Torque150.00 Nm (15.3 kgf-m or 110.6 ft.lbs) @ 3200 RPM
Power89.00 HP (65.0 kW) @ 5450 RPM
Engine detailsMilwaukee-Eight® 107, Integrated Oil-Cooler
Engine typeV2, four-stroke
Capacity:1687.97 ccm (103.00 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc. Optional ABS. 4-piston
Front brakesDouble disc. Optional ABS. 4-piston
Rear tyre180/65-B16
Front tyreMT90-B16
Rear SuspensionTwin shocks
Front SuspensionTelescopic fork
Trail170 mm (6.7 inches)
Rake (fork angle)26.0°

Physical measures and capacities

Oil capacity3.80 litres (0.25 quarts)
Fuel capacity22.71 litres (6.00 gallons)
Wheelbase1,625 mm (64.0 inches)
Ground clearance125 mm (4.9 inches)
Overall length2,420 mm (95.3 inches)
Seat height715 mm (28.1 inches) If adjustable, lowest setting.
Power/weight ratio0.2459 HP/kg
Weight incl. oil, gas, etc376.0 kg (828.9 pounds)
Dry weight362.0 kg (798.1 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
CommentsWindshield.
Carrying capacitySaddle bags
LightHigh beam, running lights, front fender running lights, directional light bar, neutral, low oil pressure, engine diagnostics, turn signals, security system (optional), 6-speed, low fuel warning, cruise control (optional), ABS (optional)
InstrumentsTank-mounted electronic speedometer with odometer, time-of-day clock on odometer; dual trip meter; low fuel indicator light and mileage countdown feature; low oil pressure indicator light; engine diagnostics readout; LED indicator lights; 6-speed indicator light
StarterElectric
Color optionsVivid Black, Bonneville Salt Pearl, Silver Fortune/Sumatra Brown, Twisted Cherry/Silver Fortune, Olive Gold/Black Tempest

Performance Profile & Rider Fit

89 hp
Peak Power
5.5s
0-60 mph

Best For

Track10%
City40%
Cornering35%
Daily Riding55%
Touring95%
Passenger85%

Rider Profile

Best ForBest suited to riders with some experience handling heavy, low-slung motorcycles, as the substantial weight demands confident low-speed control.
PurposeBuilt for long-distance highway cruising and classic American touring rather than speed or sport riding.
Rider FitA tall and heavy machine that rewards strength and deliberate handling, though its low seat height and relaxed ergonomics ease day-long comfort.
CharacterA traditional, torque-rich cruiser with timeless styling, a relaxed riding position, and effortless open-road presence.
Not Ideal ForNot the right choice for riders wanting sharp cornering agility, off-road capability, or lightweight urban maneuverability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2018 Harley-Davidson Road King Classic Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 715mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2018 Harley-Davidson Road King Classic, with a cramped knee angle of around 80 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

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MotorcycleDB Review

The 2018 Harley-Davidson Road King Classic is a timeless and iconic motorcycle that offers a perfect blend of classic design and modern technology. The bike features a powerful Milwaukee-Eight 107 engine, delivering impressive performance and a smooth ride. Its classic styling, including leather saddlebags and a windshield, make it the perfect choice for riders looking for a traditional cruiser with a touch of nostalgia. The Road King Classic is also equipped with advanced features such as electronic cruise control and a large touchscreen display, offering convenience and comfort for long rides. With its timeless design and impressive performance, the 2018 Harley-Davidson Road King Classic is a top choice for riders seeking a classic cruiser with modern amenities. Whether you're cruising down the open road or touring through the city, this motorcycle offers a comfortable and powerful ride that is sure to turn heads. Its combination of classic styling and advanced technology make it a versatile and reliable choice for riders of all experience levels. If you're in the market for a motorcycle that delivers on both style and substance, the Road King Classic is certainly worth considering.
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