Related: E-Bike Battery Health After 500 Miles: What the Logbook Says
Range is the first number on every e-bike listing and the last number I believe. I have spent 15 years at a repair stand and seven of those commuting on a motor, and I read a spec sheet the way I read a repair ticket: what is claimed, what is implied, and what nobody wrote down. This is a comparison of four budget electric bikes that cover the whole spread of the category, from a step-through errand bike to a dual-motor machine that has more in common with a motorcycle than a bicycle. I have not put 100 miles on any of these four, so I will not pretend I have. What I can do is tell you what the numbers mean, what they leave out, and which one I would shortlist for which job.
Every one of these listings leads with range. None of them leads with the brake model, the battery certification, or the weight. That tells you what sells bikes, and it tells you what you will have to dig for before you spend money.
Gotrax Dolphin 26" Step-Thru: the easy-mount errand bike
The Dolphin is the simplest machine here. A 26 inch step-through frame, a claimed 30 mile maximum range, and a 20 mph top speed. That is Class 2 territory in most states: throttle plus pedal assist, capped at 20 mph. If you want to reach the store, the library, or a short commute without swinging a leg over a top tube, the step-through geometry is the entire point of the bike.
Thirty miles is a claim, not a promise. At 20 mph with a moderate rider on flat ground, a small pack delivers roughly half of that once you lean on the throttle. Treat 30 as the ceiling on a warm day with a tailwind, and plan your round trip around 15 to 18 miles of real use. A six mile each way commute is fine. Fifteen miles each way is not.
The listing does not name the brake system, and that is the first question I would ask. A 20 mph bike needs mechanical disc brakes at minimum, and I want to know the brand. If a seller cannot tell you what stops the bike, that is your answer.
ESKUTE V100: fat tires, dual suspension, and dirt bike geometry
The V100 reads like a small dirt bike that happens to have pedals. A 1500W peak motor, dual suspension, 16 inch fat tires, a 48V 13Ah battery, a 7-speed drivetrain, and a claimed 60 mile range with a top speed north of 20 mph. Do the arithmetic on the pack: 48 volts times 13 amp-hours is 624 watt-hours. Divide that by the 60 mile claim and you land near 10 watt-hours per mile, which is a low-assist, flat-ground, light-rider number. On fat tires and a suspension fork, real mixed-surface riding will pull closer to 20 to 25 watt-hours per mile. Call it 25 to 30 miles of honest range.
The 16 inch wheel is the detail most people skip. A smaller diameter with a fat tire gives you a lower standover height and quicker acceleration, but it rolls over roots and curbs worse than a 26 inch wheel. Dual suspension softens that, and the 7-speed gearing means you can actually help the motor on a climb instead of ghost-pedaling.
Peak wattage is a marketing number. A 1500W peak figure describes what the controller allows for a few seconds, not what the motor sustains. That is fine for a burst up a steep ramp. It is not a promise of hill-climbing for a full commute.
9000W Dual Motor: the one that is not a bicycle in most states
Read this one carefully before you get excited. Two motors, 9000W combined, a claimed 48 mph top speed, a 52V 36Ah removable battery, 26 inch fat tires, full suspension, and a 400 pound capacity. The pack works out to 1,872 watt-hours, which is genuinely large, and the 120 mile range claim is at least built on a battery that could support a long ride at low assist.
Now the part the listing will not tell you: at 48 mph this is not a Class 1, 2, or 3 electric bicycle anywhere in the United States. Class 3 tops out at 28 mph. A machine that does 48 mph is a motor vehicle in the eyes of most state codes, which means it does not belong on a bike lane, a greenway, or a public road without registration, insurance, and a license, if it can be registered at all. Check your state law before you order. I have watched riders buy this class of bike and then discover they can only legally ride it on private land.
The second thing: 400 pounds of rated capacity at 48 mph demands serious brakes. Hydraulic discs with large rotors, not cable-pulled discs with undersized rotors. The listing does not name the brake system, so ask. Brakes are the spine of the bike. Everything else is cosmetic.
26" Commuter E-Bike (White): the light option for shorter rides
This is the one I would hand a first-time buyer. A 720W peak motor, a 25 mph top speed, a 375Wh removable battery, 7-speed gears, 26 inch wheels, and a claimed 50 mile range on a lightweight frame built for all-terrain use.
Run the same math. A 375Wh pack carrying a 50 mile claim is 7.5 watt-hours per mile. That is not a commuting number, that is a laboratory number: lowest assist, flat ground, a rider who weighs less than the bike. In the real world, expect somewhere between 18 and 25 miles depending on how much you use the throttle. The removable battery is the feature that matters most here, because it means you can carry the pack inside and charge it at your desk instead of running an extension cord to a bike rack.
The 25 mph top speed puts it in Class 3 territory in most states, which is worth knowing: some trails exclude Class 3 bikes, and a few cities require a helmet. Read your local rules.
How I evaluate any e-bike
I run the same four questions on every machine, whether it costs a few hundred dollars or a few thousand.
First, is the battery certified and healthy? Look for UL 2849 or an equivalent safety listing on the pack, and ask what the capacity is after 500 charge cycles. Chemistry is chemistry. No marketing department has ever made a lithium cell fireproof.
Second, do the brakes stop the bike at its real top speed? A 28 mph e-bike with a loaded rider and groceries is a different braking problem than a 15 mph cruiser. If the listing will not name the brake model, that is a red flag, not a detail.
Third, does the real range match the claim? Take the watt-hours, divide by the claimed miles, and see what number falls out. Anything under 10 watt-hours per mile is a best-case figure. Anything between 15 and 25 is honest.
Fourth, would I trust it for a year of daily commutes? That means a dealer or support channel that answers email, standard fastener sizes, and a battery you can replace without buying a whole new bike.
The four bikes side by side
| E-Bike | Motor | Battery | Claimed range | Where it fits |
|---|---|---|---|---|
 Visit on Amazon →Gotrax Dolphin 26" Step-Thru |
See listing | See listing | 30 miles | Flat errands, step-through access |
 Visit on Amazon →ESKUTE V100 |
1500W peak, 7-speed | 48V 13Ah (624Wh) | Up to 60 miles | Fat-tire trails and mixed surfaces |
 Visit on Amazon →9000W Dual Motor |
9000W dual, 48 mph | 52V 36Ah (1872Wh) | 120 miles | Private land in most states |
 Visit on Amazon →26" Commuter (White) |
720W peak, 25 mph | 375Wh removable | 50 miles | Light commuters, shorter rides |
What the numbers leave out
None of these four listings tells you the weight of the bike. Weight is the spec that decides whether you can carry it up a flight of stairs, load it on a bus rack, or lift it onto a wall hook in a small apartment. A fat-tire dual-suspension machine is heavy. A step-through with a small pack is not. Ask before you buy.
None of them names the brake system either, and that is the one I would not compromise on. Cable-actuated disc brakes can stop a 20 mph bike. They get vague and fade on a long descent on a heavy 28 mph machine. Hydraulic discs cost more and they are worth it.
Battery certification matters more than any other line on the page. Ask for UL 2849 or an equivalent listing, and buy from a seller who can produce it. A cheap uncertified pack is a fire risk in your hallway, and no range claim is worth that.
Motor type is the other thing to sort out. All four of these are hub-motor bikes, which is the right call for flat and rolling terrain: simpler, cheaper, and fewer parts to service. If you live somewhere with real sustained climbs and you want the motor to use the bike's gears, a mid-drive is the better tool. For a commuter on Austin's rolling terrain, a hub motor does the job.
Finally, plan for the 500 mile battery health check. Whatever you buy, note the range on day one and again at 500 miles. A pack that has lost 20 percent of its capacity by then is a pack you will be replacing inside two years.
Should you buy the Gotrax Dolphin?
If your riding is short, flat, and errand-shaped, yes. The step-through frame is friendly, the 20 mph cap keeps it in the most permissive legal class, and a 30 mile claim on a small pack means 15 to 18 realistic miles. Just confirm the brake spec and the battery certification before you commit.
Should you buy the ESKUTE V100?
For mixed surfaces and a dirt-bike feel, yes. The 1500W peak motor and dual suspension suit gravel and hardpack, and the 624Wh pack is a reasonable size for a fat-tire bike. Understand that 60 miles is a low-assist figure and your real number is closer to 25 to 30.
Should you buy the 9000W dual motor bike?
Only if you have private land to ride it on and you are prepared to maintain it like a motorcycle. The battery is genuinely large, the range claim has something behind it, and the 400 pound capacity is real utility. But 48 mph disqualifies it as a bicycle almost everywhere, and I would not buy one without confirming the brake system first.
Should you buy the 26" commuter?
Yes, for most first-time buyers. The 720W peak motor is plenty for a commute, the removable 375Wh pack makes charging practical, and the 7-speed gearing means you contribute on hills. Expect 18 to 25 miles of real range, not 50, and read your local Class 3 rules.
The bottom line
Match the bike to the ride, not to the biggest number on the page. If you commute six miles each way on pavement, the white 26 inch commuter is the smart pick and the step-through Dolphin is the close second. If your weekends involve gravel and dirt, the fat-tire ESKUTE V100 earns its place. The 9000W machine is the one to think hardest about, because the fastest bike here is also the one you may not be allowed to ride to work. The battery is the heart. The brakes are the spine. Everything else is cosmetic.