2015 Harley-Davidson Dyna Fat Bob Technical Analysis & Specification Breakdown
At the heart of the 2015 Harley-Davidson Dyna Fat Bob custom - cruiser motorcycle, Harley-Davidson relies on a 1688 cc (103 cu in) air-cooled v2, four-stroke powerplant. In factory specification, maximum torque reaches 132 Nm (97.4 lb-ft) at 3,250 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 98.4 x 111.3 mm (3.9 x 4.4 inches) with a 9.6:1 compression ratio.
On the scales, the Dyna Fat Bob measures 320.2 kg (706 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 663 mm (26.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,621 mm (63.8 in) wheelbase engineered for planted straight-line stability. The 18.93-liter (5 US gal) fuel tank paired with a rated consumption of 5.6 L/100 km provides an estimated theoretical range of roughly 338 km (210 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 5 indexed model years from 2013 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~338 km (210 mi)
Engine
Displacement1688.0 ccm (103.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsAir-cooled, Twin Cam 103™
Torque132.0 Nm (13.5 kgf-m or 97.4 ft.lbs) @ 3250 RPM
Compression9.6:1
Bore x Stroke98.4 x 111.3 mm (3.9 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelinePrimary chain, 34/46 ratio
Performance
Fuel Consumption5.60 litres/100 km (17.9 km/l or 42.00 mpg)
Greenhouse Gases129.9 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, “Tommy Gun” 2-1-2 collector exhaust with dual mufflers
Chassis
Rake29.0°
Trail124 mm (4.9 inches)
Wheelbase1621 mm (63.8 inches)
Ground Clearance124 mm (4.9 inches)
Wheels & Brakes
Front Tyre130/90-B16
Rear Tyre180/70-B16
Front BrakesDouble disc. 4-piston fixed. Optional ABS
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
