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How the 2025 models compare
The manufacturer’s US model pages list these specifications and starting prices. Output and fuel-economy figures are Harley-Davidson claims, not results from same-condition independent testing. Starting prices can vary by configuration, dealer and market.
| Model | Engine | Published output | Running-order weight | Laden seat height | Fuel capacity | Estimated economy | US starting MSRP |
|---|---|---|---|---|---|---|---|
| Fat Boy | Milwaukee-Eight 117 Custom | 104 hp at 4,800 rpm; 126 ft-lb at 3,000 rpm | 694 lb | 25.9 in | 5 gal | 47 mpg | $22,599+ |
| Street Bob | Milwaukee-Eight 117 Classic | 98 hp at 4,600 rpm; 120 ft-lb at 2,500 rpm | 646 lb | 25.8 in | 3.5 gal | 47 mpg | $15,999+ |
| Low Rider S | Milwaukee-Eight 117 High Output | 114 hp at 5,000 rpm; 128 ft-lb at 4,000 rpm | 670 lb | 27 in | 5 gal | 47 mpg | $19,999+ |
Sources: Harley-Davidson 2025 Fat Boy, 2025 Street Bob and 2025 Low Rider S US model pages. Confirm current pricing and exact configuration with a US dealer.
What changed on the Fat Boy
The Fat Boy gets the Milwaukee-Eight 117 Custom, a high-flow two-into-two exhaust and a retuned rear monoshock. Its five-inch analog display supports selectable Road, Rain and Sport ride modes. Harley-Davidson also lists revised hand controls, USB-C charging and an adjustable brake lever.
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The Fat Boy product page describes Rider Safety Enhancements including ABS, traction control, drag-torque slip control and tire-pressure monitoring (TPMS), with cornering-enhanced versions noted among the features. See the manufacturer’s 2025 Fat Boy page for the feature details.
What changed on the Street Bob
The Street Bob moves from the 114 engine to the Milwaukee-Eight 117 Classic. Harley-Davidson pairs it with a two-into-one exhaust, revised intake and retuned suspension. The listed equipment and styling updates include LED lighting, a tank medallion and a four-inch analog display with Road, Rain and Sport modes, plus USB-C charging.
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The manufacturer names cornering ABS, traction control, drag-torque slip control and TPMS among the Street Bob’s standard rider-safety equipment. It lists cast wheels and optional tubeless laced wheels, so check the specific bike’s configuration rather than assuming which wheel setup is included. Details appear on the 2025 Street Bob page.
What changed on the Low Rider S
The 2025 Low Rider S uses the Milwaukee-Eight 117 High Output with a two-into-one exhaust and heavy breather intake. Harley-Davidson also retuned the rear suspension and added a four-inch analog display with Road, Rain and Sport modes. The page notes updated hand controls and a new Rider Safety Enhancements suite.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesStyling details include Performance Red accents and five paint options, including the Factory Custom color Mystic Shift. These details apply to the Low Rider S, not automatically to every 2025 Low Rider variant. See the 2025 Low Rider S page.
Which 2025 model fits your priorities?
- Fat Boy: Consider it if you want the broadest listed fuel capacity of the group, a five-inch display and the 117 Custom tune. It is also the heaviest and has the highest listed starting price among these three.
- Street Bob: It has the lowest listed US starting price and running-order weight. Its 3.5-gallon tank is smaller than the Fat Boy’s and Low Rider S’s five-gallon tanks.
- Low Rider S: It has the highest manufacturer-published horsepower and torque figures in this comparison, alongside the tallest listed laden seat height. Those specifications alone do not establish acceleration, handling or comfort superiority.
Seat height and weight are useful screening figures, not a substitute for sitting on the motorcycle and assessing reach, balance and control. Likewise, the published output numbers compare manufacturer specifications; they do not establish how the bikes perform against one another on the road.
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Low Rider S is not the same designation as Low Rider ST
Harley-Davidson’s 2025 lineup lists the Low Rider ST separately. This comparison is specifically about the Low Rider S because that is the variant documented with the 2025 overhaul details above. Do not apply the S’s engine, equipment or styling description to the ST without checking its own model specifications.
The official 2025 Harley-Davidson owner’s manual covers the Fat Boy, Street Bob and Low Rider S. Consult the manual and the exact model-page listing for operating and configuration details.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
