How Many Watts Do You Need in a Conversion Kit?

Most riders converting a regular bike are well served by 500W; heavier riders, steep hills, cargo, and trike conversions are what push you toward the 750–1000W end of the range. Watts measure how much power the motor can deliver — but motor type and gearing change how a given number of watts actually feels, so the right answer depends on your weight, your terrain, and what you're converting.

What does wattage actually measure?

A watt is a rate of power: how much work the motor can do per second. In practical terms, wattage is your budget for the three things that demand power on a ride — accelerating from a stop, holding speed against wind and rolling resistance, and lifting you and the bike up a hill.

Climbing is where the budget gets spent fastest. Doubling the total weight being lifted, or doubling the steepness, roughly doubles the power the climb requires. That's why the same 500W motor that feels strong under a light rider on flat ground can feel strained under a heavy load on a grade — the motor didn't change, the bill did.

Is a higher-wattage motor always faster?

Not necessarily — and this surprises people. Top speed on an e-bike is governed mainly by the system's voltage, controller settings, and motor winding, and legal e-bike classes cap assisted speed regardless of power (see below). What extra watts mostly buy is how the bike gets there and what it can hold: stronger acceleration, less speed loss on hills, and the ability to keep pulling under load without bogging down. If your riding is flat and unhurried, a bigger motor adds little. If your riding involves hills or weight, wattage headroom is the whole ballgame.

What's the difference between continuous and peak watts?

A motor's continuous rating is the power it can sustain indefinitely without overheating. Peak power is what it can deliver in short bursts — pulling away from a stop or punching up a short, steep pitch. When you compare systems, the continuous figure is the honest one for hill-climbing and cruising; peak figures describe moments, not miles. Our conversion systems are offered in 500–1000W configurations, so the real decision is where in that range your riding sits.

How much power do you need for hills, a heavier rider, or cargo?

As general practice:

• Around 500W suits an average-weight rider on flat-to-rolling terrain, commuting and recreational riding on a standard bike. This is the sweet spot for most two-wheel conversions.
• 750W is the step up for riders who are heavier, live somewhere genuinely hilly, or regularly carry loads — it restores the hill-climbing headroom that weight and grade eat into.
• Toward 1000W makes sense at the extremes: very heavy combined loads, steep terrain, and utility builds where the motor works hard at low speed for long stretches.

Notice that rider weight, cargo, and terrain all spend from the same budget. A lighter rider on hills and a heavier rider on the flat can land on the same wattage for the same reason.

Does the motor type change how the watts feel?

Yes — this is the part the raw number hides.

Our front systems use a geared hub motor in the 500-1000W range. A geared motor runs through internal reduction gears, which multiply torque at the wheel, especially at low speed. That makes a geared motor feel stronger off the line and on climbs than its wattage alone suggests, and the motor freewheels when you're pedaling unpowered, so the bike rides like a bike.

Our rear systems use a direct-drive hub motor — also 500-1000W, in a high-torque design. A direct-drive motor has no internal gears: the motor is the hub. It delivers a strong, steady pull, runs quietly, and has essentially one moving part, which is why it's the configuration we use where sustained torque matters most.

Same watts, different character: gearing trades toward low-speed punch and light feel; direct drive trades toward simple, sustained pulling power.

What about trikes and fat bikes?

Trikes spend power differently. A converted trike is heavier than a bike, often carries cargo, and asks its motor for repeated low-speed pulls — so trike conversions generally belong at the stronger end of the range. Our tricycle conversion systems are built around that workload, and our rear fatbike system runs 750W — the right neighborhood for a heavy, wide-tired bike that will see soft surfaces and loads. If you're converting anything that carries weight for a living, start your thinking at 750W, not 500W.

Where does 750W fit legally?

In general terms: the three-class e-bike framework used by most U.S. states defines e-bikes with motors up to 750W, with assisted-speed limits that depend on the class. That 750W figure is why you see it so often — it's the ceiling of the standard class definitions. Rules vary by state and locality, and a converted bike's classification can depend on both its motor and its settings, so treat this as context rather than legal advice and check your local rules before you ride. Nothing here changes the practical guidance above: choose power for your weight and terrain first.

How does this map to our lineup?

• Front geared systems, 500-1000W — the all-rounder for standard bikes: strong low-speed torque from the gearing, simple installation, works with most forks (with a torque arm, which front hub motors should always run).
• Rear direct-drive systems, 500-1000W, high-torque — for riders who want sustained pulling power and the simplest, quietest motor design.
• Rear fatbike system, 750W — sized for heavy fat-tire builds and the loads they carry.

Start from your total load and your steepest regular hill, pick the wattage that covers both, and let motor type — geared front or direct-drive rear — decide the feel.

Quick answers

How many watts do I need for a conversion kit? 500W covers most riders on flat-to-rolling ground. Choose 750W or more if you're heavier, ride steep hills, carry cargo, or are converting a trike.

Does more wattage mean a faster e-bike? Not by itself. Extra watts mainly buy acceleration and hill-climbing strength; assisted top speed is set by the system and by e-bike class limits.

What is the difference between geared and direct-drive hub motors? A geared motor uses internal gears to multiply torque, so it pulls harder at low speed and freewheels when off. A direct-drive motor has no gears — the hub is the motor — giving a strong, steady, quiet pull with fewer moving parts.

Is 750W enough for a trike conversion? For most trike conversions, yes — trikes are heavier and carry more, which is why our fatbike system runs 750W and trike builds belong at the stronger end of the range.

Why is 750W such a common e-bike motor size? Because the three-class e-bike framework used by most U.S. states caps class motors at 750W — but always check your own state and local rules.