• The Alpha ST step-thru fat tire e-bike in black, shown from the side in a studio view.
  • Black Alpha Step-Thru electric bike with Kenda tires on a white background side iew
  • A three-quarters studio view of The Alpha ST step-thru e-bike in Seabreeze Green, highlighting its low-step frame and fat tires.
  • Sea Breeze green Alpha Step-Thru side view
  • Close-up of The Alpha ST's 26-inch by 4-inch fat tire and 4-piston hydraulic brakes.
  • Detailed view of The Alpha ST's rugged, integrated rear rack with built-in tail light.
  • Detailed close-up of The Alpha ST's 52-volt, 1040 watt-hour frame-integrated battery.
  • A close-up view of The Alpha ST's high-resolution color display and handlebar controls.
  • A close-up view of The Alpha ST's high-resolution color display and handlebar controls.
  • Close-up of The Alpha ST's powerful, integrated off-road headlight.
  • The Alpha ST e-bike shown with optional accessories, including a front basket and rear pannier bags.
  • Side view of Aplha ST with Surf Rack attached and presenting a surfboard

Murf Electric Bikes

The Alpha ST Step-Thru E-Bike | Class 3

The Alpha ST Step-Thru E-Bike | Class 3

SKU: EB-ALPST-OB-ML

Price: $2,595.00
List Price: $2,595.00
Price: $2,595.00
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THE ALPHA ST

Easy Mounting. No Compromise on Power.

Accessibility doesn't mean settling. The Alpha ST combines our industrial-grade 52V power plant with a reinforced 18.5-inch step-thru chassis. You get the ease of a low-step entry without sacrificing torque, range, or stability. Hit 28 MPH in Class 3 mode, climb hills that stop standard cruisers, and ride confidently on 4-inch fat tires. It's the easiest bike to mount—and the hardest to beat off the line. Premium components. No apologies.

KEY SPECS

Icon Spec
⚡ Class Class 2 or 3 (user selectable)
🔋 Motor 750W Rear Hub
🔌 Battery 52V, 1040 Wh
💨 Speed 28 MPH (Class 3)
🛣️ Range 30–60 miles
✓ Safety UL 2849 & 2271 Certified
WHO'S THIS FOR

Need a step-thru that doesn't compromise on torque? Want to mount and dismount easily while still hitting 28 MPH? Looking for accessibility without settling for a "beginner" bike?

What you can do:

  • Mount effortlessly in any outfit (18.5" ultra-low step)
  • Hit 28 MPH in Class 3 mode from a standstill
  • Climb steep hills without struggling or draining battery
  • Carry gear on the integrated aluminum rear rack
  • Explore mixed terrain with 30–60 mile range
TECHNICAL SPECIFICATIONS THAT MATTER
Specification Detail Why It Matters
Motor 750W Rear Hub Reliable acceleration; same torque curve as non-step-thru models
Battery 52V/20Ah, 1040Wh High-voltage efficiency for hills; 30–60 mile range
Top Speed 28 MPH (Class 3) Highway-entry speed; fast enough to merge with traffic
Classification Class 2 or 3 Throttle at 20 MPH or pedal-assist up to 28 MPH; you choose
Brakes Tektro Hydraulic Disc 4-piston stopping power; essential for safe braking at 28 MPH
Frame Step-Thru Chassis 18.5" step-over; reinforced downtube for structural rigidity
Tires 26" x 4" Fat Tires Vehicle-like stability; massive footprint for grip on all terrain
Weight 70 pounds Stable at speed; feels planted and secure
Stepover 18.5" Lowest entry point in class; accessible for 5'0"–6'5"+ riders
Lighting 550-Lumen Integrated See and be seen; powered directly by the main battery
Display Color LCD Speed, range, and power data at a glance
Warranty 2-Year Electrical Peace of mind on motor, battery, display, and lights
Safety UL 2849 & 2271 Entire system independently tested and certified
FROM PROBLEM TO SOLUTION

Frame & Geometry

18.5" Low-Step Chassis

Hate the awkward leg swing? We engineered an open invitation.

✓ 18.5" Step-Over Height – Mount and dismount with dignity, in any outfit.

✓ Reinforced Chassis – We thickened the downtube to ensure structural rigidity despite the open frame.

✓ Inclusive Design – Fits riders from 5'0" to 6'5" comfortably.

Battery System

52V High-Torque Power

Thought step-thru meant "slow"? Think again. This is a wolf in sheep's clothing.

✓ 52V Advantage – Aggressive acceleration that leaves 48V bikes in the dust.

✓ 750W Rear Hub – The torque to flatten hills without draining your battery.

✓ 1040Wh Capacity – "Range anxiety" isn't in our vocabulary (30–60 miles per charge).

Speed & Modes

Class 2 or 3 Flexibility

Can't decide between throttle-only or pedal-assist? Don't choose—get both.

✓ Class 2 Mode – Cruise at 20 MPH on throttle only (perfect for relaxed commuting).

✓ Class 3 Mode – Unlock 28 MPH pedal assist for serious speed.

✓ User Selectable – Switch modes instantly with one button.

Braking System

4-Piston Hydraulic Control

When you have a 52V motor, stopping power isn't optional.

✓ 4-Piston Calipers – Commercial-grade stopping power, wet or dry.

✓ Hydraulic Control – Smooth modulation with minimal hand effort.

✓ Safety First – Confident braking whether you're cruising at 10 MPH or 28 MPH.

Lighting System

Integrated 550-Lumen LED

Ride safely after dark without managing separate batteries.

✓ See and Be Seen – 550-lumen beam cuts through the dark.

✓ Brake Sync – Integrated tail light brightens when you pull the levers.

✓ System Powered – Always on, always charged.

Tires & Stability

26" x 4" All-Terrain

The "SUV" of bike tires.

✓ Massive Footprint – Absorbs bumps and potholes for a smooth ride.

✓ Mixed Terrain – Gravel, sand, and wet pavement are no problem.

✓ Planted Feel – The width provides unmatched stability at high speeds.

REAL-WORLD SCENARIOS

The Dignified Commute

8-mile morning ride to the office. You mount the Alpha ST wearing dress pants or a skirt—no awkward contortions, no chain snagging. You cruise in Class 2 throttle mode, arriving fresh.

The Win: Professional arrival. No "cyclist" outfit required.

The Weekend Trail Explorer

Same bike, Saturday morning. The fat tires grip loose gravel on the fireroad. You hit 28 MPH on the straights. The low step-thru frame makes hopping off for a quick photo easy and safe.

The Win: One bike that handles the work week and the weekend.

The Family Fleet

One bike for the whole house. The 18.5" step-thru fits the 5'2" rider and the 6'4" rider equally well. No passing the "tall bike" around.

The Win: Universal fit for multi-rider households.

WHAT'S INCLUDED

Ready Out of the Box

75% pre-assembled. Handlebar and seat assembly required.

The System

  • The Alpha ST Step-Thru Frame
  • 52V/1040Wh Integrated Battery
  • 750W Rear Hub Motor
  • Integrated Rear Rack (Color-Matched)
  • 550-Lumen Headlight & Brake Light
  • Fast Charger (5–6 Hour)
COMPATIBLE WITH

Assembly & Setup

Assembly Guide Video – Complete assembly instructions, component overview, and getting started guide

Approved Accessories

SHIPPING & DELIVERY

Shipping

Free shipping to 48 continental states

Delivery Timeline

5–10 business days from order confirmation

Assembly Support

Assembly Guide Video

Warranty

2-year warranty on all electrical components (motor, battery, display, lights). All components covered under manufacturer defect protection. Proof of purchase required.

Warranty & Purchase Agreement

For complete details on warranty, returns, and our purchase agreement, please review our Warranty & Purchase Agreement Policy

Great reasons to buy from us:

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