Nobody has rated this kit, and right now nobody can buy it. The SZWEDI 72V 5000W hub motor wheel sits on a listing marked currently unavailable, with no buybox and no promise of a restock. Our August review noted the zero-review record, and nothing has changed since: no ratings, no written texts, no review section at all. Everything below rests on the spec sheet, the seller's own contradictions, and our comparison data.
That is a thinner file than almost any kit we cover, and it changes what a review can honestly do. There are no owner quotes to weigh and no failure patterns to report, so this piece does the two jobs a spec-only review can do: decode what the listing actually says, and place the kit in our own data. Both jobs turned up things the seller probably did not intend.
The listing argues with itself about the battery
The kit ships without a battery, and the two bullets that explain this cannot agree on what to demand from yours. One bullet asks for a battery BMS rated 85 amps at 72V. The very next bullet says the kit needs a battery with a BMS of 80 amps. Both bullets repeat that a wrong battery can damage the kit, which makes the disagreement more than a typo hunt.
The number both statements do share is the controller's current limit, 80 amps, printed in the first bullet. A BMS that passes at least the controller limit is the only reading that survives both sentences, because a pack whose BMS cuts below what the controller draws will trip under load or cook itself. Buy the pack to the 85 amp figure and you clear the 80 amp demand with room to spare, which is the safe side of either number.
The rest of the box list is complete for a rear-hub conversion with no battery. It includes the motor wheel itself, the 80 amp controller in a bag, a left pedal sensor, a 1T4 cable harness, a thumb throttle, and an electric brake cutoff. That is everything except the one expensive component that makes it move.
The power math, done once and honestly
The claims resolve cleanly against each other. Seventy-two volts times the 80 amp controller limit is a 5,760 watt ceiling, and the 5000W name in the title sits under it with room. Run the motor at its full claimed output and the battery delivers about 69 amps continuous, so the 80 amp limit is headroom rather than a cruising figure. Those are arithmetic restatements of the listing's own numbers, not performance promises.
The battery side is where casual buyers get stranded. A 72V nominal pack is 20 lithium cells in series, and it charges at 84 volts, which no 48V or 52V ebike charger can supply. Every charger, BMS, and display in the build must speak 20s lithium, and the parts that do are scarcer and pricier than the mainstream voltages. The controller measures 165 by 100 by 60 millimeters, which is a substantial box to mount on any frame.
Nothing in the record tests these claims. A 5000W hub on paper is a possibility for sale, not a measurement, and the absence of any buyer report means the first person to wire this up is also its test pilot.
Forty pounds on the axle
The details table lists the kit at 40 pounds, and every ounce of it hangs on the rear axle as unsprung mass. For scale, a complete ebike battery weighs 8 to 16 pounds, and this kit outweighs the heaviest of them by more than double before the pack is even added. A fat-bike rear triangle built around a 40 pound wheel, motor, controller, and then a 20 pound battery on the rack, is asking a lot of aluminum dropouts.
The fit facts are specific. The hub needs 175 millimeter dropout spacing, which is fat-bike rear-end width, not the 135 or 148 millimeters on standard mountain bikes. The rim is 20 by 4.0 inches, double walled, laced with 12 gauge stainless spokes, which are thicker than the 14 gauge common on commuter wheels because high torque eats thin spokes. Amazon files the fit under Vehicle Specific Fit, and that is the right category.
High-torque hubs also try to spin the axle inside the dropout slots, which is what torque arms are for, and builders running power at this level commonly fit two. On a frame with aluminum dropouts, that is not optional insurance, it is the difference between a build and a wrecked frame.
Where it sits in our data, stated plainly
On our own numbers this is not a bargain, and we track the whole market. We rank 191 conversion kits by price per watt of claimed motor power on our comparison table, and this one sits among the most expensive we track, at roughly 11 cents per watt of claimed power at the stored price. The exact position renders in the specs box below, because the live figure moves.
The live figure is a strange one right now. The dead page still displays 499, while our table stores 568 from the last working data pull, and neither number is an offer because there is no buybox behind either. When the listing returns, the price it comes back at is unknowable from here.
Expensive per watt is not automatically disqualifying for a 72V kit, since high-voltage controllers and fat-bike wheels cost real money to build. But value claims need evidence, and this listing supplies none. The honest summary is that you would be paying a top-of-market price for an unproven product you cannot currently order.
The law, and who should wait for a restock
Federal law defines a low-speed electric bicycle as a pedaled vehicle with a motor under 750 watts and a 20 mph motor-only top speed. A 5000W kit sits nearly seven times past that line, so the finished bike is not an ebike in the eyes of most state vehicle codes. It falls into moped or motor vehicle territory instead, where licensing, registration, and insurance rules apply and vary by state. The state-by-state picture is worth reading before the build, not after.
Who should wait for a restock: almost everyone. There is no buybox, no rating, no owner report, and no way to know the return price. A kit this heavy, this powerful, and this unproven is a poor first high-voltage build under any circumstances.
Who it suits when it does return: an experienced builder with a fat-bike frame, an 85 amp-class 72V pack already sourced, and a realistic plan for where a machine like this can legally ride. That is a short list, and the zero-review record means even its members are betting on a spec sheet.
Frequently Asked Questions
Does the SZWEDI kit include a battery?
No. The kit includes the motor wheel, the 80 amp controller and its bag, a pedal sensor, a 1T4 harness, a thumb throttle, and an electric brake cutoff. The battery is a separate purchase and the single largest cost in the build.
What battery BMS rating does it need?
The listing contradicts itself, asking for 85 amps in one bullet and 80 in the next. The controller limit is 80 amps, so a BMS rated 85 amps or higher satisfies both statements and keeps discharge headroom over the controller.
Will it fit my bike frame?
It needs 175 millimeter rear dropout spacing with clearance for a 20 by 4.0 inch wheel. That is fat-bike territory. Standard mountain-bike spacing will not accept the hub without frame modification the listing does not describe.
Is a 72V 5000W kit street legal?
Not as an ebike in the US. Federal law caps low-speed electric bicycles at 750 watts and 20 mph, and states classify anything far beyond that as a moped or motor vehicle with licensing and registration requirements. Check your state's rules before building.
How fast will it go?
Nobody knows. No buyer has ever reported a speed for this kit, and our earlier version printed a range that had no source behind it. The controller math says the hardware supports motorcycle-class power, which is a ceiling, not a measurement.
Should I buy it now?
You cannot. The listing is currently unavailable with no restock date. Watch the current Amazon listing for a return, and compare the rest of the market on our conversion kit table in the meantime. More coverage lives on the blog.