E-Bike Range and Motors Explained
Two specifications decide how an e-bike actually performs, and both are routinely misrepresented. Claimed range is a best-case number nobody achieves, and advertised wattage is often a peak figure that means very little.
Here is how to read both properly.
The short version
- Real world range: under 500Wh gives 30 to 50km, 500 to 750Wh gives 50 to 80km, 750Wh+ gives 80km or more.
- Claimed range is a ceiling, measured flat, light rider, low assist.
- Compare watt-hours, not amp-hours. Volts times amp-hours equals watt-hours.
- Biggest range killers: assist level, hills, weight, cold, low tyre pressure.
- Hub motor: simpler, quieter, cheaper, no chain wear. What most fat tyre bikes use.
- Mid drive: climbs better, better weight balance, costs more, wears drivetrains.
- Ignore peak wattage. Ask for continuous output and torque.
What we cover
Real world range · Watt-hours explained · What kills range · How to get more · Hub vs mid drive · Reading power figures · FAQ
How far will it really go?
| Battery size | Realistic range | Suits |
|---|---|---|
| Under 500Wh | 30 to 50km | Short commutes, errands, flat routes |
| 500 to 750Wh | 50 to 80km | Most commuting. The common range |
| 750Wh and above | 80km or more | Long commutes, hills, heavier riders, touring |
These are flat-terrain figures at moderate assist with an average rider. Hills, throttle use and a heavy load can cut them substantially.
Why claimed figures are always higher. Manufacturer range is measured under best-case conditions: flat ground, a light rider, the lowest assist setting, warm weather, correct tyre pressure and no wind. Every one of those is optimistic. Treat the claim as a ceiling you will not reach rather than a target.
The practical rule: work out your longest realistic round trip, then buy a battery that covers it comfortably in the middle of its range, not at the edge. Arriving with reserve is worth more than the money saved on a smaller pack.
Watt-hours, and why amp-hours mislead
Watt-hours is the number that predicts range, and it is the one to compare between bikes.
Volts times amp-hours equals watt-hours. A 48V 15Ah battery is 720Wh. A 36V 15Ah battery is 540Wh. Same amp-hours, meaningfully different capacity.
That is why comparing amp-hours across bikes with different voltages tells you nothing useful, and why some marketing leads with amp-hours. If a listing only gives amp-hours, ask for the voltage and do the multiplication.
Two bikes with identical watt-hours can still differ in real range, because motor efficiency, weight, tyres and controller tuning all play a part. Watt-hours gets you most of the way, not all of it.
What actually reduces your range
| Factor | Impact | Can you control it? |
|---|---|---|
| Assist level and throttle | Largest single factor | Yes, and it is free |
| Hills | Substantial. Climbing is where the motor works hardest | Route choice |
| Rider and cargo weight | Significant | Partly |
| Tyre pressure | Large and completely fixable | Yes. Check weekly |
| Cold weather | Noticeable, and temporary | Store the battery indoors |
| Headwind | Significant on exposed routes | No |
| Stop-start riding | Accelerating from rest uses the most | Partly |
| Battery age | Gradual, permanent | Good charging habits slow it |
Tyre pressure is the one worth acting on. Underinflated fat tyres have enormous rolling resistance and quietly cost a large slice of range. It is the most common cause of a bike that suddenly does not go as far, and riders almost always blame the battery.
Getting more out of a charge
- Sit lower in the assist range. Roughly doubles your distance and you still arrive without effort.
- Correct tyre pressure. Free, weekly, biggest fixable factor.
- Pedal rather than riding on throttle where you have the option.
- Keep momentum. Anticipate lights rather than accelerating hard from a stop.
- Keep the drivetrain clean. A dirty chain wastes energy.
- Store the battery indoors in winter and fit it before you leave.
- Carry less. Weight matters more than most people assume.
Hub motor or mid drive?
| Hub motor | Mid drive | |
|---|---|---|
| Location | In the wheel hub | At the pedals and cranks |
| How it drives | Turns the wheel directly | Through the chain and gears |
| Climbing | Good on typical urban hills | Better, especially sustained and steep |
| Weight balance | Weight at one wheel | Low and central. Handles better |
| Drivetrain wear | None from the motor | Significant. Chains and cassettes wear fast |
| Complexity | Simpler, fewer failure points | More complex |
| Noise | Generally quieter | More audible |
| Cost | Lower | Higher |
| Common on | Most fat tyre e-bikes | Premium commuters and e-MTBs |
Hub motors are what almost every fat tyre e-bike uses, and for good reason. Simple, reliable, quiet, cheaper, and they put no extra load through your chain. For flat to moderately hilly urban riding they are entirely sufficient.
Mid drives use your gears, so the motor stays in its efficient range as the gradient changes. That makes them noticeably better at sustained steep climbing and at hauling loads. The trade-offs are cost and drivetrain wear, because all that torque goes through the chain.
The honest answer for most buyers: a hub motor is enough. Choose a mid drive if you have genuinely steep sustained climbs, carry heavy loads, or want the handling benefit of centred weight. Do not pay for one because it sounds more advanced.
How to read power figures
This is where specifications are least trustworthy.
Peak versus continuous. Advertised wattage is frequently peak output, which a motor can only sustain briefly. Continuous rated output is the honest figure and it is often far lower. A bike advertised at 1000W might be a 500W continuous motor. Ask which number you are being shown.
Torque matters more than wattage for hills. Torque, in newton metres, is what gets you up a gradient from low speed. Two motors with the same wattage can climb very differently. If a brand publishes torque figures, that tells you more than the wattage headline.
Legality is set by continuous output, not peak. An EN15194 certified bike runs a 250W continuous motor with assistance cutting off at 25km/h, and that is what makes it legal on Victorian roads and shared paths. Our buying guide covers that properly.
Range and motors FAQ
How far will an electric bike really go on one charge?
As a real world guide, a battery under 500Wh gives roughly 30 to 50km on flat terrain at moderate assist, 500 to 750Wh gives 50 to 80km, and above 750Wh you can expect 80km or more. Claimed figures are a ceiling, measured flat with a light rider on low assist.
What are watt-hours on an e-bike battery?
Watt-hours measure how much energy the battery holds, and it is the number that actually predicts range. Multiply voltage by amp-hours to get it. A 48V 15Ah battery is 720Wh. Compare watt-hours between bikes rather than amp-hours, which can mislead across different voltages.
What reduces e-bike range the most?
Assist level and throttle use first, then hills, rider and cargo weight, headwind, cold weather and low tyre pressure. Underinflated fat tyres are the most common and most fixable cause, and riders usually blame the battery instead.
What is the difference between a hub motor and a mid drive?
A hub motor sits in the wheel and drives it directly, which is simpler, quieter and cheaper, and it does not wear the chain. A mid drive sits at the pedals and drives through the gears, which climbs better and balances weight more evenly, at a higher price.
Is a hub motor good enough for commuting?
Yes, for most riders. Hub motors handle typical urban terrain comfortably and are what most fat tyre e-bikes use. Mid drives pull ahead on sustained steep climbing and when carrying heavy loads, which is a minority of commuting.
Does motor wattage tell you how powerful an e-bike is?
Not reliably. Advertised wattage is often peak rather than continuous, and peak figures are not comparable between brands. Torque in newton metres is the better indicator of hill performance, and continuous rated output is the honest power figure.
Ask us for the real number
Tell us your actual commute, including the hills and roughly what you weigh, and we will tell you honestly what range to expect on a given bike rather than quoting the brochure. Demo bikes at 435A Bridge Road, Richmond, open seven days.
Call 03 9421 2293. Free shipping Australia wide on orders over $90.
Keep reading: How to Choose a Fat Tyre E-Bike · Battery Care and Charging · What Does an E-Bike Cost? · Maintenance Guide · E-Bike Laws Victoria
Shop: Fat Tyre E-Bikes · EN15194 Certified · All Electric Bikes