Murf Electric Bikes
The Fat PAX Step-Thru E-Bike | Class 3 Cruiser
The Fat PAX Step-Thru E-Bike | Class 3 Cruiser
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SKU: EB-FMST-BN-UL
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- Price: $1,895.00
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- List Price: $1,895.00
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- Price: $1,895.00
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PRODUCT DESCRIPTION
THE FAT PAX STEP-THRU
The Heritage Cruiser | Pathfinder Pedal
THE ORIGINAL ALL-TERRAIN CRUISER
The Fat PAX Step-Thru didn't just follow trends—it created them. This is the platform that defined the category: a high-voltage electric cruiser that prioritizes "float" and style over pure utility. We paired a robust 52-volt power plant with a timeless 19-inch step-thru silhouette, making it accessible to anyone who wants to ride. The 4-inch fat tires provide pneumatic suspension, smoothing out everything from boardwalk planks to gravel trails. It proves that capability and comfort can look good.
What You're Getting:
- Timeless Silhouette: Classic beach cruiser curves with a 19" accessible step-over
- Pneumatic Suspension: 4-inch fat tires act as natural shock absorbers for a "floating" ride feel
- 52V Torque: Stronger acceleration and hill climbing than standard 48V cruiser systems
- Class 2 or 3 Flexibility: Cruise at 20 MPH (Throttle) or unlock 25 MPH (Pedal Assist)
- The "Pax" Feel: Upright, relaxed positioning that puts you in command without aggression
KEY SPECS
| Spec | Detail |
|---|---|
| Class | Class 2 or 3 (User Selectable) |
| Motor | 750W Rear Hub |
| Battery | 52V, 780Wh |
| Speed | 25 MPH (Class 3 Mode) |
| Range | 30–60 miles |
| Weight | ~75 pounds |
| Safety | UL 2849 & 2271 Certified |
WHO'S THIS FOR
Best Fit: All-terrain riders seeking accessibility, cruiser enthusiasts wanting fat tire capability, and anyone who values "ride feel" and comfort above industrial utility.
What You Can Do:
- Hit 25 MPH in Class 3 mode for thrilling open-road riding
- Cruise at 20 MPH on throttle only for effortless sightseeing
- Handle sand, gravel, and light trails confidently with fat tire grip
- Mount and dismount with grace thanks to the 19" step-thru frame
- Ride 30–60 miles per charge on long coastal or urban loops
TECHNICAL SPECIFICATIONS THAT MATTER
| Specification | Detail | Why It Matters |
|---|---|---|
| Motor | 750W Rear Hub | Reliable power delivery; responsive acceleration for mixed terrain. |
| Battery | 52V, 780Wh | Strong range (30–60 miles); powerful system for all-terrain capability. |
| Top Speed | 25 MPH (Class 3) | Thrilling performance; faster than Class 2-only bikes when you want speed. |
| Classification | Class 2 or 3 | User Selectable. Flexibility to cruise at 20 MPH or unleash full 25 MPH. |
| Brakes | Tektro Hydraulic Disc | Smooth, powerful, reliable stopping power in all conditions. |
| Drivetrain | 7-Speed Shimano | Crisp shifting; flexibility for varied terrain and hills. |
| Tires | 26" × 4" Fat Tires | Exceptional comfort; pneumatic suspension effect; grip on sand/gravel. |
| Frame Geometry | 19" Step-Thru | Classic silhouette; low entry point accessible for most riders. |
| Weight | ~75 pounds | Substantial build for durability; stable at speed. |
| Headlight | 550-Lumen 3-LED | Bright visibility; integrated for simplicity. |
| Safety | UL 2849 & 2271 | Entire electrical system independently tested and verified. |
FROM CONFIDENT FEATURES TO REAL-WORLD BENEFITS
Heritage & Design
The Original Platform
This is the trailblazer. The Fat PAX proves that an e-bike can be rugged without looking like a tank.
- Timeless Design – Curves that evoke classic cruisers, not industrial machinery.
- 19" Step-Over – A geometry that invites you in. Mount and dismount with confidence and grace.
- Upright Positioning – High-rise handlebars put you in a relaxed, heads-up posture.
Handling & Comfort
All-Terrain Float
We don't use complex suspension forks—we use physics.
- Pneumatic Suspension – The massive air volume of the 4-inch tires absorbs vibration and bumps naturally.
- Mixed Terrain Grip – Pavement, gravel, sand, and light trails are all in play.
- Stable Footprint – The wide contact patch provides confidence at low and high speeds.
Powertrain
52V High-Torque System
Cruisers shouldn't be slow. The 52V system ensures you have the torque to keep up with traffic and flatten hills.
- 52V Advantage – Stronger acceleration and better climbing capabilities than 48V competitors.
- 60-Mile Range – High capacity (780Wh) means you can explore without "range anxiety."
- Class 3 Capability – Unlock 25 MPH speeds when you need to cover ground quickly.
Control
Hydraulic Precision
When you have a 52V motor, stopping power isn't optional.
- Tektro Hydraulic Discs – Consistent, powerful braking in wet or dry conditions.
- 7-Speed Drivetrain – Unlike single-speeds, you can downshift for hills or upshift for speed. You dance with the terrain, not fight it.
REAL-WORLD SCENARIOS
The Coastal Commute
Ride to coffee shop (3 miles, Class 3 pedal-assist for light exercise). Explore beach boardwalk (2 miles, throttle mode). Return home (3 miles, leisurely pace).
The Win: Relaxed, fun, accessible transportation.
The Weekend Adventure
Load light cargo and head out (5 miles, mixed terrain). Explore new trail system (6 miles, Class 2 throttle for safety on rough ground). Stop for lunch. Return home.
The Win: Capable range for a full day out.
The Active Family Outing
Pick up kids/friends. Cruise to park. Explore park trails. Ice cream run. The step-thru frame makes the "stop-and-go" of social riding effortless.
The Win: Social connection without the sweat.
WHAT'S INCLUDED
75% Pre-Assembled.
- Fat PAX Step-Thru Frame & Fork
- Motor (750W Rear Hub)
- Battery (52V, 780Wh Integrated)
- Handlebars & Stem (Cruiser Style)
- Wheels (26" × 4" Fat Tires)
- Brakes (Tektro Hydraulic Disc)
- Drivetrain (7-Speed Shimano)
- Display & Controls
- Lights (Headlight + Tail)
ASSEMBLY & SETUP
The Fat PAX Assembly Video
30-minute walkthrough covering frame assembly, handlebar adjustment, wheel installation, and pre-ride safety checks.
APPROVED ACCESSORIES
The Fat PAX Step-Thru pairs seamlessly with accessories designed for style and functionality:
- Kryptonite Keeper Chain Lock – UL-tested security chain. Lightweight, portable, urban-proof.
- Big Dawg Rack Bag – Weatherproof top-loader for light cargo. Handles groceries, camera gear, weekend essentials.
- Kroozie Deluxe Cup Holder – Handlebar-mounted cup/phone holder. Responsive to bumps, stays secure.
- Front Basket – Lightweight . Carries light cargo; complements the classic cruiser aesthetic.
- Rear Basket – Quick-release rear basket. Compatible with the Fat PAX frame system.
WARRANTY, RETURNS & CLAIMS
2-Year Coverage: We stand behind our build with a 2-year warranty on all electrical components (motor, battery, display, lights). All components are covered under manufacturer defect protection. Proof of purchase required.
Policy & Returns: For complete details on return windows, damage reporting, and refunds, please review our full Return & Refund Policy.
Support: Need to file a claim or have questions? Reach our team directly via our Contact Page.

This Bike is new and different than my previous one. Brakes and tires excellent, easier to get on and off of Bike with Step thru. Guys did a super job on set up and prep. After a few rides now getting used to toggling the 3/2 system. Lighting is nice and new controls are an improvement for sure. Sales folks and Steve also great and very patient. The crew really went all out get this bike ready and set it up the way I needed it. The newer 3/2 bikes do hold back a little on speed and power vs previous alpha but very reliable and great distances from the battery. A good cruiser!
This Bike is new and different than my previous one. Brakes and tires excellent, easier to get on and off of Bike with Step thru. Guys did a super job on set up and prep. After a few rides now getting used to toggling the 3/2 system. Lighting is nice and new controls are an improvement for sure. Sales folks and Steve also great and very patient. The crew really went all out get this bike ready and set it up the way I needed it. The newer 3/2 bikes do hold back a little on speed and power vs previous alpha but very reliable and great distances from the battery. A good cruiser!
Cannot say enough about this awesome bike! Sturdy, and rides like a dream.. I get tons of compliments on the bike wherever I go.. Everyone at Murf was super helpful when I test drove the bikes before I decided on the Fat Murf Step Thru (special thanks to Frankie D). Great experience all around. Highly recommend!
Cannot say enough about this awesome bike! Sturdy, and rides like a dream.. I get tons of compliments on the bike wherever I go.. Everyone at Murf was super helpful when I test drove the bikes before I decided on the Fat Murf Step Thru (special thanks to Frankie D). Great experience all around. Highly recommend!
Nice Ride
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