Harley-Davidson Fat Boy specifications

Harley-Davidson · Cruiser

The Harley-Davidson Fat Boy is Harley's Milwaukee-Eight 117 cruiser, rated at 103 hp and 126 lb-ft with a 5 gal tank and a 65 in wheelbase. It has a 240 mm-section rear tire and solid-disc wheels, and Harley prices it at $22,599.

What a ride review found

Street Bikers World says riders debate whether a 260 rear tire upgrade sharpens turn-in, but a gentle lean and a subtle weight shift tamed the Fat Boy's girth for the tester. The report says the 2025 Fat Boy surprises at every turn with bespoke comfort, credible handling, modern tech and a finish that stops traffic, and that on firing up the Milwaukee-Eight 117 the 126 lb-ft of torque planted the rider in the seat.

Numbers for a heavyweight cruiser

The Fat Boy weighs 694 lb in running order, 48 lb more than the Street Bob, on a 65 in wheelbase with 30 degrees of rake and 4.1 in of trail. The front tire is a 160/60R18 and the rear a 240/40R18, the fork is a 49 mm dual-bending valve unit with aluminum triple clamps. The rear is a hidden coil-over monoshock with hydraulic preload adjustment.

It has 4.9 in of ground clearance and a 25.9 in laden seat, and the tank holds 5 gal.

Fat Boy against the rivals

At $22,599 the Fat Boy costs $2,600 more than Indian's Sport Chief at $19,999 and $5,100 more than the Chief Bobber at $17,499, and $600 more than Indian's Super Chief at $21,999. It is 9 lb heavier than the Chief Bobber and 55 lb lighter than the Super Chief. BMW's R 18 weighs 760.5 lb. The Fat Boy has the widest rear tire of these machines.

What the fat tires and solid wheels mean

The Fat Boy's look comes from a 240/40R18 rear tire and a 160/60R18 front, with silver split seven-spoke floating rotors. The rake is 30 degrees and the trail 4.1 in, less than the Street Bob's 6.2 in. So the steering is quicker than the bike's width suggests. The 240 rear tire takes more effort to turn in, which is why the reviewer's comment about leaning and shifting weight matters.

Ground clearance is 4.9 in. So a rider who leans hard will scrape the pegs on a spirited road.

Price against the other Softails

At $22,599 the Fat Boy is the most expensive of the Softail cruisers in this comparison, $7,600 above the Street Bob and $3,600 above the Low Rider S. What the extra money buys is the styling, the 5 gal tank (1.5 gal more than the Street Bob), the wider tires and the hidden monoshock with hydraulic preload. Its 103 hp is 5 more than the Street Bob's 98.

Its 126 lb-ft is 6 more than the Street Bob's 120. Riders who want the Fat Boy's look and can accept the price get that combination.

Against the other big cruisers

The Fat Boy costs $22,599, $400 less than the Breakout at $22,999 and $600 more than Indian's Super Chief at $21,999. At 694 lb it is 13 lb heavier than the Breakout's 681 lb, 25 lb lighter than the Heritage Classic's 719 lb and 45 lb lighter than the Super Chief. Its 25.9 in seat is 0.3 in above the Breakout's, and its 5 gal tank matches theirs.

Those figures make it the mid-priced, mid-weight choice among the big Softail cruisers.

What to look at before buying

The Fat Boy's solid disc wheels and wide tires are the styling. So look at the tires for wear on the rear, which is costly to replace on a 694 lb bike. Ask whether the seat has been changed, because a low 25.9 in laden seat is the point of the model.

Check the exhaust for heat discolouration and the fuel gauge for accuracy, and ask the dealer which Screamin' Eagle parts are fitted. Compare a new Fat Boy with a lightly used Softail of another model, since the frame and 117 engine are shared.

Ownership costs to plan for

At $22,599 the Fat Boy is priced above most cruisers. So insurance and financing are large costs. The solid wheels are easy to clean but the wide rear tire is expensive to replace. The chrome needs regular polishing. Harley's service intervals are set by the dealer, so ask for the schedule and the price of the first service.

Because the Fat Boy has a huge accessory catalog, budget for the parts you will want, such as a windshield or saddlebags, which can add thousands.

Fat Boy against the Super Chief and Chief Bobber

Indian's Super Chief and Chief Bobber are the closest cruiser rivals

Harley-Davidson Fat Boy

117 cu in; 694 lb; 25.9 in; $22,599.

2026 Harley-Davidson Fat Boy questions

How much torque does the Harley-Davidson Fat Boy make?

Harley rates the Milwaukee-Eight 117 at 126 lb-ft and 103 hp. Street Bikers World says the torque plants the rider in the seat.

How heavy is the Fat Boy?

Harley lists 694 lb in running order with a 5 gal tank and a 65 in wheelbase. The reviewer says a gentle lean and weight shift tames its girth.