The Alpha Fat Tire E-Bike | Class 3

52 Volts. 28 MPH. Single-Speed Simplicity. Zero Compromises.

The Alpha is Murf’s flagship speed cruiser engineered to get you across town fast without the complexity, chain drops, or maintenance headaches of traditional bicycle derailleurs. Powered by a high-output 750W Bafang geared rear hub motor backed by an oversized 52V 20Ah (1,040Wh) Samsung lithium battery pack, The Alpha delivers instantaneous off-the-line torque and sustains a true 28 MPH Class 3 cruise speed. Fitted with heavy-duty Tektro 4-piston hydraulic disc brakes, an ultra-bright 1,080-lumen 6-LED integrated headlight, puncture-resistant 26" × 4.0" Kenda fat tires, and a rugged frame-integrated rear cargo rack. Built for daily commuters, coastal cruisers, and riders who demand reliable high-voltage performance without having to babysit fragile gears.

Who's This For

Tired of fragile rear derailleurs getting bent on bike racks, greasy chains slipping off sprockets, and 48V batteries dying halfway through your headwind commute? Want a clean, aggressive fat tire cruiser that holds 28 MPH effortlessly, stops on a dime with 4-piston hydraulic brakes, and requires almost zero drivetrain maintenance?

What you can do:

• Sustain 28 MPH in Class 3 pedal-assist mode powered by a high-voltage 52V system that doesn't bog down against headwinds
• Ride 30 to 60 miles on a single charge backed by 1,040Wh of premium Samsung 21700 lithium cells
• Eliminate gear shifting, derailleur adjustments, and dropped chains completely with the bulletproof single-speed setup
• Stop with authoritative control from 28 MPH using Tektro 4-piston hydraulic calipers on 180mm stainless steel rotors
• See up to 100 yards ahead and remain visible in city traffic with an integrated 1,080-lumen 6-LED off-road headlight and frame brake light
• Haul groceries, surfboards, panniers, or cargo baskets up to 350 lbs total payload on the reinforced rear rack
• Float over potholes, light sand, coastal boardwalks, and crushed limestone with high-volume 26" × 4.0" Kenda fat tires

What This Bike Actually Solves

Bent Derailleurs and Dropped Chains Ruin Daily Commutes

The Problem: Traditional multi-gear commuter bikes use exposed rear derailleurs that easily bend during transit, get knocked out of index on bike racks, and drop greasy chains during emergency shifts at red lights.

The Solution: The Alpha utilizes a clean, heavy-duty single-speed chainline paired with high-torque motor programming. The 750W motor provides the mechanical torque leverage you need off the line and on inclines, eliminating gear hunting and routine drivetrain adjustments entirely.

Power Voltage Sag on Cheap 48V Systems

The Problem: Standard 48V e-bike batteries experience significant voltage drop as they discharge below 50%, resulting in sluggish acceleration, reduced top speed, and motor laboring on evening return commutes.

The Solution: The Alpha's 52V architecture operates at a higher nominal voltage, maintaining crisp throttle response and 28 MPH cruising velocity even in the lower half of the 1,040Wh battery discharge curve.

Inadequate 2-Piston Brakes on Fast, Heavy Cruisers

The Problem: Bringing a 70-lb e-bike with rider and cargo to a sudden stop from 28 MPH rapidly overwhelms standard 2-piston mechanical or entry-level hydraulic calipers, causing brake fade and long stopping distances.

The Solution: Premium Tektro 4-piston hydraulic calipers distribute clamping force across four oversized pistons, maximizing pad contact against 180mm disc rotors for one-finger, fade-free braking in all weather conditions.

Real-World Riding Scenarios

The 28 MPH Traffic Merge & Coastal Headwind (7:45 AM)

7:45 AM. You're commuting downtown into a stiff 18 MPH headwind. Instead of struggling against crosswinds and hunting through multiple gears, you set pedal assist to Level 4. The 52V Bafang powertrain punches through the resistance, holding a steady 28 MPH pace that allows you to claim your lane and merge safely with vehicular traffic through busy intersections.

The Win: Confident lane integration, fast commute times, and zero chain slips when accelerating out of red lights.

The Sunset Beach Cruise & Boardwalk Session (6:15 PM)

6:15 PM. Work is done. You load a towel and backpack onto the integrated rear rack and head toward the coastal trail. The 26" × 4.0" Kenda fat tires glide across boardwalk gaps and loose beach sand access paths with cushion and composure. As dusk settles, the 1,080-lumen 6-LED headlight illuminates the trail ahead like high-beams while the integrated rear light keeps you visible to strollers and riders.

The Win: Stress-free transition from high-speed commuter to relaxed beach cruiser with zero post-ride bike maintenance.

The Alpha vs. Standard 48V Commuters: What the Premium Delivers

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