Murf Alpha ST Review: Specs, Range & Verdict
A close look at the Murf Alpha ST — the 28 MPH Class 3 step-through that pairs the biggest battery in the Murf range with 26×4 fat tires and 4-piston hydraulic brakes.
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TL;DR
Murf Alpha ST Review: The Short Version
The Alpha ST is the Murf you buy when 20 MPH is not enough. Class 3 operation lifts the ceiling to 28 MPH, the 1040Wh battery is a third larger than the rest of the lineup, and 26×4 tires with 4-piston brakes give the bike the stability and stopping power that higher speeds demand. At roughly $2,595 it is the most complete bike Murf sells.
The costs are real: it is the priciest model here, it weighs 70 lbs, and it is still single speed, so steep sustained climbs rest entirely on the motor. If your rides are short and local, you are paying for headroom you may never use.
Best for
Faster commuters, longer rides, and taller riders who want the full-size frame
Skip it if
You ride short local routes, want the lowest price, or need a lighter bike
The Trade-Offs
Murf Alpha ST Pros and Cons
What we like
- ✓28 MPH top speed in Class 3 mode — the fastest Murf you can buy
- ✓1040Wh battery is the largest in the current lineup
- ✓26×4 fat tires stay planted and confident at higher speeds
- ✓4-piston hydraulic disc brakes match the extra speed and weight
- ✓Step-through frame keeps mounting easy despite the performance spec
- ✓330 lb capacity edges out the standard Higgs ST
What to consider
- !The most expensive bike in this Murf roundup
- !70 lbs — heavy to lift onto a rack or carry upstairs
- !Single speed, so steep climbs still rest entirely on the motor
- !The bigger 26-inch frame is less nimble in tight spaces
Frame & Build
Design and Build Quality
The Alpha ST keeps the step-through aluminum frame that defines the Murf range, then scales everything up around it. Twenty-six-inch wheels replace the Higgs ST’s 20-inch hoops, which lengthens the wheelbase and raises the riding position. Taller riders who find the compact models cramped will feel the difference immediately.
That growth costs weight. At 70 lbs this is the heaviest bike in the lineup, and it is not a bike you casually lift onto a hitch rack or carry up a stairwell. Payload capacity rises to 330 lbs, which gives a little more headroom for a rider plus a loaded rack.
Component selection is where the price goes. Four-piston hydraulic disc brakes are a meaningful step up from the two-piston units used elsewhere in the range, and they are the right call for a 70 lb bike traveling at 28 MPH. The 20Ah battery mounts externally on the seat tube and comes off for indoor charging.
Power & Range
Motor, Battery, and Real-World Range
The motor is the same 750W rear hub used across the lineup, but the Alpha ST lets it run to 28 MPH in Class 3 mode instead of stopping at 20. On open road that extra 8 MPH changes the character of the bike — it keeps pace with neighborhood traffic rather than being overtaken by it, and it cuts meaningful time off a longer commute.
Feeding it is a 52V 20Ah pack rated at 1040Wh, the largest battery Murf fits. Murf quotes 30–60 miles, the same band as the smaller-battery models, which tells you something important: the extra capacity is there to offset the higher speed, not to add range on top of it. Expect 25–45 miles in practice, with sustained Class 3 riding at the bottom of that range and relaxed Class 2 riding at the top.
The drivetrain is the one place the Alpha ST does not upgrade. It is still single speed, so on a steep sustained climb there is no gear to drop into and the motor does all the work. Riders facing daily hills should look at the 7-speed Higgs Cargo, even though it is slower on the flat.
On the Road
Ride Quality and Handling
Bigger wheels change the ride noticeably. Twenty-six-by-four-inch tires roll over potholes, expansion joints, and gravel with less deflection than 20-inch fat tires, and the longer wheelbase keeps the bike settled at speed instead of twitchy. This is a bike that feels better the faster it goes.
Braking matches the performance. The 4-piston calipers shed 28 MPH quickly and stay consistent on repeated stops and long descents, which is exactly where the two-piston brakes on lighter models start to feel marginal.
The trade-off shows up at low speed. Parking-lot turns, crowded paths, and tight garages all ask more of the rider than they do on the compact Higgs ST, and walking the bike takes noticeably more effort. Class 2 mode is worth knowing about — it caps assist at 20 MPH for paths and trails that restrict Class 3 bikes.
Against the Lineup
Murf Alpha ST vs the Rest of the Murf Range
| Model | Price | Top Speed | Battery | Why choose it |
|---|---|---|---|---|
| Murf Alpha ST | $2,595 | 28 MPH | 1040Wh | Fastest Murf, biggest battery, strongest brakes |
| Murf Higgs ST | $1,995 | 20 MPH | 780Wh | Best value and the more compact, easier-to-store frame |
| Murf Higgs Plus | $2,295 | 20 MPH | 780Wh | Longer frame built to carry a passenger |
| Murf Higgs Cargo | $2,395 | 20 MPH | 780Wh | Extended rack, 7 speeds, and cargo-first geometry |
| Murf Gigi | $1,995 | 20 MPH | 780Wh | Classic cruiser styling over fat-tire performance |
Deciding between the two step-throughs? Read our full Murf Higgs ST review, or see the complete Murf ebike review covering every model.
Full Specifications
Murf Alpha ST Specs
| Motor | 750W rear hub |
|---|---|
| Battery | 52V · 20Ah · 1040Wh |
| Claimed range | 30–60 miles |
| Realistic range | 25–45 miles |
| Top speed | 28 MPH (Class 3 mode) |
| Tires | 26" × 4" fat tires |
| Brakes | 4-piston hydraulic disc |
| Drivetrain | Single speed |
| Frame | Step-through aluminum |
| Weight | 70 lbs |
| Payload capacity | 330 lbs |
| Class | Class 2 / Class 3 selectable |
| Price | $2,595 (confirm current pricing) |
Specifications are drawn from Murf’s published product information and owner reports. Manufacturers change components between production runs — confirm current specs, pricing, and availability on the official product page before buying.
FAQ
Murf Alpha ST Review FAQs
Is the Murf Alpha ST worth the extra money?+
If you ride longer distances or share roads with traffic, yes. The roughly $600 premium over the Higgs ST buys 28 MPH Class 3 speed, a 1040Wh battery instead of 780Wh, larger 26-inch tires, and 4-piston brakes. If you mostly ride paths and neighborhood streets, the Higgs ST is the better value.
How fast is the Murf Alpha ST?+
Up to 28 MPH in Class 3 mode, which makes it the fastest bike in the Murf lineup. It can also be run in Class 2 mode at 20 MPH where local rules or bike paths require it.
What is the real-world range of the Alpha ST?+
Murf lists 30–60 miles. Plan on 25–45 miles in normal riding. The 1040Wh battery is large, but higher speeds consume far more energy per mile, so sustained 28 MPH riding pulls range toward the low end.
Murf Alpha ST vs Higgs ST: which should you buy?+
Choose the Alpha ST for speed, range, and braking power. Choose the Higgs ST to save about $600 and get a lighter, more compact bike that is easier to store and maneuver. Both share the same 750W motor and step-through layout.
Is the Alpha ST good for hills?+
Better than the rest of the lineup thanks to the larger battery and strong brakes for the descents, but it is still single speed. On steep sustained climbs there is no lower gear to help the motor, so expect to slow down.
Is a Class 3 e-bike legal where I ride?+
Class 3 rules vary by state and city. Many bike paths and multi-use trails restrict Class 3 bikes or require the assist capped at 20 MPH. The Alpha ST's selectable Class 2 mode covers those situations — check your local regulations before riding.
Is the Murf Alpha ST UL certified?+
Murf lists UL 2849 and UL 2271 compliance on its current e-bike models. Confirm certification on the official product page before buying, since specifications change between production runs.
The Verdict
The Murf to buy when speed and distance matter
At roughly $2,595, the Alpha ST earns its premium with 28 MPH Class 3 speed, a 1040Wh battery, and brakes built for both. Buy it for longer rides and faster roads. If most of your riding is short, local, and relaxed, the Higgs ST does the same job for about $600 less.
Prices and availability change. Confirm current details on the official Murf site.