Biktrix Stunner Step-Over Auto Review: Automatic Shifting for an Easy Commute for $2,349
A premium mid-drive commuter with a self-shifting gear hub, a big battery, and a throttle — you pay up front, but you get a genuinely low-effort daily ride.
What the extra money buys you with the Biktrix Stunner Step-Over Auto is a commute you barely have to manage. The Lofandi automatic gear hub picks your gear for you as you speed up and slow down, so at every light and every hill you just pedal and go. That's the whole pitch, and it's a good one for anyone who's tired of fiddling with a shifter in stop-and-go traffic.
The rest of the bike backs that up. A 750W motor with handles steep hills and a loaded bike without drama, and the 960Wh gives you real range to work with. It's a bike, so there's a and you can ride without pedaling up to 20 mph. At $2,349 its Genius Score of 67 out of 100 tells the story: a genuinely good premium commuter where you're mostly paying for the polish and the hands-off shifting.
Pros & cons
What we like
- The automatic gear hub shifts for you as your speed changes, which takes all the guesswork out of city stop-and-go riding.
- A motor with pulls a loaded bike up steep hills with room to spare.
- The 960Wh is large for a commuter, and range is one of this bike's real strengths.
- A lets you pull away from a stop or rest your legs without pedaling at all.
- Dual-piston give you strong, low-effort stopping for a heavier bike.
Worth weighing
- The value works out to middle-of-the-pack for the price — at $2,349 you're paying mainly for the automatic hub, so it earns its keep only if hands-off shifting is something you actually want.
- The eye-catching 85-mile range figure needs the upgraded 1,200Wh battery at extra cost; the standard pack is rated for up to 55 miles.
Key specs
The motor & power
The heart of this bike is a 750W Bafang BBS02 motor, which works hand in hand with the automatic hub to keep you in the right gear and gives you a strong, natural-feeling push when you're pedaling.
Where it really shows off is climbing. With , steep grades and a heavy load barely slow it down, which is why power is the strongest part of this bike. There's easily enough muscle here to haul groceries or a second rider up a hill that would leave a weaker commuter crawling.
On the class side, it's a bike, so it has a and you can ride up to 20 mph without pedaling at all. The throttle is handy for getting moving from a dead stop or resting your legs, just know that leaning on it pulls the battery down faster than pedaling does.
Biktrix builds this around a 750W motor, but the spec sheet caps output at 500W and 20 mph. That software limit is what keeps it Class 2 and street-legal in most places. Peak wattage isn't published, so judge the motor on that 750W rating and the strong torque number rather than a headline burst figure.
Range & battery
The Stunner ships with a 960Wh , which is generous for a commuter and a big reason range is a high point here. Biktrix quotes up to 55 miles on a charge.
That 55-mile number assumes easy conditions, so your everyday total will land lower depending on your hills, your cargo, and how often you thumb the throttle. Even with a realistic trim, this pack has enough in it to cover a week of normal commuting between charges for a lot of riders.
That 55-mile figure is for the standard 960Wh battery. Biktrix also advertises up to 85 miles, but that requires stepping up to the larger 1,200Wh pack, which costs extra. Plan your buying decision around 55 miles unless you specifically pay for the bigger battery.
The ride & components
The Lofandi 3-speed automatic hub is what sets this bike apart day to day. Instead of clicking through gears yourself, it senses your speed and picks the gear for you, so pulling away from a red light and settling into a cruise both happen without you touching a shifter. If your commute is a lot of starting and stopping, that's a real quality-of-life upgrade.
Stopping is handled by Biktrix dual-piston with 180mm rotors, the right call for a bike this heavy, and they give you firm, confident braking with light lever effort. The 26x2.3-inch tires are wide enough to smooth out rough pavement and soak up potholes while still rolling quickly.
At about 75 pounds with the battery, it sits at the heavier end for a commuter. That's a non-issue if you store it at ground level or can roll it into an elevator or garage, which is where a bike like this is happiest anyway.
Price & value
At $2,349 this is firmly a premium commuter, and it's fair to ask what the money gets you. The honest answer is the automatic shifting, the strong mid-drive, and the large battery working together as one polished package.
Value is where the math gets real. For its capability, the price lands middle-of-the-pack, and plenty of capable hub-motor commuters will match its range and get you to work just as reliably for less. So the real question isn't whether it's good, it's whether hands-off gears and mid-drive climbing power are worth the step up in price for how you actually ride.
Who it's for
The set-it-and-forget-it commuter
If your ride is full of lights, stop signs, and traffic, the automatic hub is the reason to buy this. You never think about gears, you just pedal, and the is there when you want to pull away from a stop or coast without pedaling. For a low-hassle daily rider, this is an easy pick.
The rider with real hills
If your commute throws long or steep climbs at you, or you're often towing a trailer, the routes its power through the gears so it keeps pulling where a wheel-mounted motor would start to bog down and heat up. The big battery is the other half of that story: a hilly round trip won't leave you short on juice before you get home.
The budget-minded shopper
If a dependable ride to work is really all you need and the automatic hub doesn't excite you, $2,349 is a lot to spend. What you're paying extra for here is convenience and climbing muscle, so if your route is mostly flat and you don't mind clicking through gears yourself, your money will stretch further on a simpler bike.
The speed seeker
The Stunner is a bike capped at 20 mph on both the throttle and pedal assist, so if you're hoping to cruise at the 28 mph a Class 3 commuter allows, this isn't the one. For most city riding 20 mph is plenty, but riders with long, open stretches sometimes want that extra headroom.
Frequently asked
Does the Biktrix Stunner Step-Over Auto have a throttle?
Yes. It's a Class 2 e-bike with a thumb , so you can ride without pedaling up to 20 mph. The throttle is great for starting from a stop, though using it a lot will drain the battery faster than pedaling.
Can you ride the Biktrix Stunner Step-Over Auto without pedaling?
Yes. The throttle lets you cruise up to 20 mph without turning the pedals at all. For the longest range, though, you'll want to pedal with the assist most of the time and save the throttle for hills and stoplights.
How does the automatic shifting on the Biktrix Stunner Step-Over Auto work?
It uses a Lofandi 3-speed automatic gear hub that senses your speed and picks the gear for you, so there's no shifter to click. You just pedal, and it handles gear changes as you speed up and slow down.
How far does the Biktrix Stunner Step-Over Auto go on a charge?
Biktrix claims up to 55 miles on the standard 960Wh battery. Real-world range will be lower depending on hills, load, and throttle use. A larger 1,200Wh battery is offered separately and is advertised for up to 85 miles.
How fast does the Biktrix Stunner Step-Over Auto go?
It's limited to 20 mph, both on the throttle and under pedal assist, which is what makes it a Class 2 e-bike. If you want a 28 mph top speed, you'd need a Class 3 commuter instead.
How much does the Biktrix Stunner Step-Over Auto weigh?
About 75 pounds with the battery installed, which is fairly typical for a well-equipped commuter. It rolls easily on flat ground, but plan on it being a two-handed lift if you need to carry it up stairs.
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Read the reviewHow we score: the Genius Score blends a bike's capability against same-price peers with its value for the money, weighted for what this commuter buyer prioritises. Specs are pulled from the manufacturer's live page and normalised (nominal vs peak watts, true weight with battery). Ratings are our estimate from specs, not a lab test.