Turning a road bike electric without spending much is a narrow window, because most budget hub kits are sized for 26-inch or 20-inch wheels and look wrong on a bike built around 700C rims. The YUASDUU 700C kit sits in that window, in the cheapest fifth of our conversion kit comparison, and the current listing asks 119.99 for it.
My verdict up front: the score on this listing is a 5.0 resting on one written text that carries no purchase badge and reads like template praise, so I'd set the stars aside entirely.
What's left is a gearless 1,000W rear hub with a display, priced well below most of the field, sold with a warranty row that says No and a parts row that names two items. If the seller confirms what actually ships, this is a cheap way into a 700C build. If they don't, the price is the only promise on the page.
What one text can and cannot tell you
The rating block prints 5.0 out of 5 from a single global rating, and the reviews page carries exactly one text, the same one on the recent and helpful sorts. It was posted August 4, 2026, it praises explosive power on hills and easy overtaking, and it has collected ten helpful votes.
No purchase badge sits on it anywhere. One text wearing ten helpful votes on a listing with a single rating is a strange distribution, and the phrasing does the rest, because "the effect of modifying the original car" is translationese for a bicycle part, the kind of sentence that travels with template copy rather than with riders.
I won't call the text fake, because there's no way to know. What I can say is what it cannot carry. One text tells you nothing about how the motor holds up over months, nothing about install friction, nothing about how the seller behaves when something breaks, and nothing about whether the claimed 45-55 km/h survives contact with a road.
Treat the perfect score as presentation, not as a verdict from the people who bought this.
A complete kit that lists two parts, under a warranty that says No
Bullet one says the kit "includes all the necessary parts for a complete bike conversion, eliminating the need to purchase separate parts."
The spec table answers with a parts row that reads, in full, 1* Motor Wheel 1* Display. The controller that bullet two's cruise function lives on, the brake levers that bullet two's power cutoff needs, and the pedal assist sensor that bullet five describes are all missing from the row.
Two more rows make it worse. Bullet three calls the kit "an electric bike conversion kit with battery," and no battery row exists anywhere on the page, while our own data records the battery as not included. No kit in this price class ships one, so the phrase is copy that wandered in from a different listing.
And the Warranty Description row says No, outright, which is rarer than a thin warranty and easier to read. Before ordering I'd ask the seller what ships in the box, because the two claims on this page that matter most after purchase both point the same way.
Three names for one rim
The title offers 700C, 28-inch, and 29-inch wheels as if they were options. Under ISO 5775, the standard that sizes bicycle rims by bead seat diameter, all three road sizes mount on the same 622mm rim. The informal inch names overlap and mislead, which is the reason the standard exists, so the title's range is one wheel wearing three labels.
The measurement that decides fit is rear dropout spacing, and the listing never prints it. Most modern frames run 135mm at the rear, older road frames run 126 or 130, and a hub built for one spacing won't sit in another. Measure your dropouts before you order, and put the number in front of the seller, because this page gives you nothing to check it against.
The speed claim and the battery math
Bullet three claims a top speed of 45-55 km/h from the 1,000W gearless motor. A 700C wheel with a road tire rolls about 2.2 meters per turn, so 55 km/h needs roughly 420 revolutions per minute and 45 km/h about 340. Both sit inside the normal no-load band for a 48V gearless hub, so the claim is plausible and completely unverifiable from the page.
No-load means no rider, no friction, no hill, and real riding lands below the ceiling. It's also a motor running above the 750W continuous level that US three-class e-bike law uses, so where you ride it is your question to answer.
On 48 volts, 1,000 watts draws about 21 amps at full power. The listing prints no controller amp rating, so the pack's BMS has to cover the motor's draw, and no battery ships at any price. Our battery table sorts packs by cost per watt-hour, which is the honest way to price the second purchase this kit forces.
The gearless trade and a load figure that misses its own conversion
Gearless means no brushes to wear out and fewer moving parts to service, and hub motors generally are simple, durable, and affordable compared to other designs, though less suited to high speeds.
The trade is weight and drag: a direct-drive hub resists you more when you pedal unpowered, and all of it hangs off your rear dropouts as a single rotating assembly. On a road frame built for a light wheel, that change is felt every time you lift the back of the bike.
The load claim gets its own eyebrow. Bullet four says the aluminum frame carries up to 264 pounds, which it renders as about 110 kilograms.
The conversion is wrong, since 264 pounds is about 120 kilograms, roughly ten more than the bullet prints. It's a small error with no safety consequence, but it's the same care level the parts row shows, and it tells you nobody has proofread this listing against itself.
The brand's other listing behaves the same way: the YUASDUU 48V 1500W kit we rebuilt in October carries a No warranty row and a two-item parts row while its bullets promise PAS, display, brake levers, and a controller bag.
Two listings, one brand, the same gap between the promise and the box. On price, the kit sits in the cheapest fifth of the 191 kits we track, and at the live figure the cost per watt runs about 0.12.
Frequently Asked Questions
Does the YUASDUU 700C kit include a battery?
No. Bullet three's "with battery" phrase is template copy, the parts row names only a motor wheel and a display, and our data records the battery as not included. Budget for a 48V pack and check the battery comparison table for cost per watt-hour.
Is 45-55 km/h a real speed?
It's a plausible no-load ceiling and nothing more. The rev math works on a 700C wheel, but no-load means no rider and no friction, and real riding lands below it. No owner text exists to confirm either direction.
What does the warranty cover?
Nothing, as far as the page says. The Warranty Description row reads No, which is an explicit statement rather than a missing row. Any promise beyond that would have to come from the seller in writing.
Can I trust the 5-star rating?
I wouldn't. One rating and one text is not a record, the text carries no purchase badge, and its phrasing reads like template copy. The Mahugde 700C kit from the same listing family has no record at all, which tells you how thin this tier of the market is, and the kit comparison table shows which kits in the field have records behind them.