Hiboy S2 Nova vs NIU KQi 100F: Which Should You Buy? (2026)

Side by side

	Hiboy S2 Nova 46	NIU KQi 100F 61
Motor & speed
Top speed (claimed)	19 mph✓	17.4 mph
Peak power	420 W	600 W✓
Nominal power	350 W✓	300 W
Drive	Single motor	Single motor
Max incline	15%	15%
Battery & range
Claimed range	20 mi✓	18 mi
Est. real-world range	11–14 mi✓	10–13 mi
Battery	324 Wh✓	243 Wh
Charge time	5.5 h	5.5 h
Build
Weight	34.5 lb✓	38.8 lb
Max load	220 lb	265 lb✓
Suspension	rear	front
Brakes	—	Drum front + regenerative
Water resistance	IPX4	IPX5
Tyres	8.5" solid	9.5" pneumatic
Features
Score (within category)	46/100	61/100✓
Price	$287✓	$299

A green ✓ marks the better figure on that row. “—” means the manufacturer does not publish it; a blank is never counted as a loss. Scores compare each model within its own category.

What the makers don't publish

Hiboy does not publish brake hardware for the Hiboy S2 Nova — 1 of the 15 specifications we track. NIU publishes every specification we track for the NIU KQi 100F. We show a dash for each of those rather than estimate, and a missing figure is never counted against a scooter in our scoring — the component is dropped and the remaining weights renormalise. Those rows cannot be compared head to head, so treat this as a comparison of what is published rather than a complete picture. If one of the unpublished figures is the one your decision turns on, ask the seller in writing before you buy: a maker that measures a specification usually states it, and silence is a reasonable prompt to look harder.

Motor & speed

On top speed the two are effectively level — 19 mph plays 17.4 mph — so speed alone will not decide this, and you should weigh the other rows more heavily. The NIU KQi 100F carries more motor on paper, and that surplus shows up in acceleration and on climbs rather than in a higher cruising speed — the place a stronger motor actually earns its keep is the hill you take twice a day. Read any top-speed figure as a maximum reached under ideal conditions; rider weight and gradient both pull it down in the real world, so treat these numbers as a ceiling rather than a cruising promise.

Battery & range

Battery capacity is the honest way to compare range, because watt-hours cannot be marketed around: the S2 Nova holds 324 Wh and the KQi 100F 243 Wh. The Hiboy S2 Nova's 33% larger pack will out-last the other on the same route whatever the two brochures claim, and it is the single number to trust most in this section. Both claims deserve the usual discount. The S2 Nova's 20-mile figure realistically works out to about 11–14 miles once you account for a normal rider at real speeds; the KQi 100F's 18 lands at roughly 10–13. Plan around the lower end of whichever band matters to you: if your daily round trip does not fit inside it with margin to spare, the range difference here is the deciding factor and you should pick the bigger battery. Whichever you choose, remember that both figures assume a fresh battery; a pack loses roughly 20–30% of its capacity after a couple of years of daily cycling, so a used example of either will fall short of these numbers.

Build & ride

Weight is where the daily reality lives: 34.5 lb against 38.8 lb, a 4.3 lb difference. If you carry the scooter up stairs or onto a train, the lighter Hiboy S2 Nova is the one you will actually keep using — the difference between a scooter that gets ridden and one that gathers dust is often a single flight of steps. Each publishes a water-resistance rating (IPX4 and IPX5); the higher of the two shrugs off heavier rain, though neither should be ridden through standing water or pressure-washed. Tyres differ too: S2 Nova runs solid and KQi 100F pneumatic. Pneumatic and tubeless tyres absorb more of the road than solid ones, at the cost of the occasional puncture; solid tyres never flat but pass more buzz into your hands and feet.

Price, score & value

On price the two are almost identical ($287 and $299), so cost is not the deciding factor here — the money is the same whichever you pick. Within their category the NIU KQi 100F scores higher (61/100 to 46/100). Remember that our scores are within-category judgements — this comparison is only meaningful because both sit in the same or an adjacent class. If value per dollar is your lens, use the cost-of-ownership calculator on this site: a slightly cheaper scooter with pneumatic tyres can cost more to run over a few years than a pricier one on solid tyres, and the sticker price alone hides that.

What's identical

These two share more than they differ on. 3 published specifications are identical across both: charge time (5.5 h), max incline (15%), drive (Single motor). That matters more than it first appears, because it narrows the decision to a short list: the 12 measures where they actually diverge — peak power, battery capacity, system voltage and others — carry the whole choice. Anything on the identical list can be set aside: it will be the same experience whichever you buy, so it should not sway you either way.

• Charge time: 5.5 h
• Max incline: 15%
• Drive: Single motor

What these numbers actually govern

Here is what each of these measures controls in general — both the ones that separate these two and the ones they share. These describe the measure, not a claim about how either scooter rides, which we have not tested.

peak power

Peak power is a short-burst figure — it describes acceleration headroom rather than what a motor can hold on a sustained climb.

battery capacity

Watt-hours are the single best predictor of range, because capacity is the one range input that cannot be marketed around.

system voltage

Higher-voltage systems typically hold performance better under load — hills and heavier riders — with less sag at the same power draw.

water resistance

An IP rating describes water resistance, not immersion — it covers rain and splashes, never standing water or a pressure washer.

tyre type

Pneumatic and tubeless tyres absorb road imperfections that solid tyres pass into the deck; solid tyres trade that comfort for never puncturing.

Charge time (both 5.5 h)identical on both

Charge time matters most if you top up between a morning and an evening commute rather than overnight — an identical figure removes that from the decision.

Max incline (both 15%)identical on both

A climbing grade is quoted under test conditions and a heavier rider reaches the limit sooner than the figure suggests; an identical claim means neither is specified to climb better.

Drive (both Single motor)identical on both

A second motor adds traction and acceleration at the cost of weight and battery drain. Where both use the same arrangement, drive layout is not a separator.

Price & where to buy

Who should buy which

Buy the Hiboy S2 Nova if you want the bigger battery (324 Wh vs 243 Wh — a clear 25% edge), or you want more sustained power (350 W vs 300 W — a modest 14% edge). Buy the NIU KQi 100F if you want more peak output (600 W vs 420 W — a decisive 30% edge), or you want the higher-voltage system (48 V vs 36 V) for less sag under load. Whichever you pick, 3 specifications are identical across both — charge time, max incline, drive — so those rows cannot decide it. Within their category our score puts the NIU KQi 100F at 61/100 against 46/100.

Bottom line: the NIU KQi 100F is the safer default here — it peaks higher (600 W vs 420 W). The Hiboy S2 Nova earns its place if the bigger battery (324 Wh vs 243 Wh) matters more to you. Every figure here is the manufacturer's published claim or a value we compute from it, linked back to each maker's own specification so you can check it yourself.

Frequently asked questions