Fast Answer for Busy Riders ⚡ (TL;DR)
The SOFLOW SO2 AIR MAX is the more capable overall scooter thanks to its huge real-world range, stronger motor and bigger, more forgiving tyres - it simply covers far more use cases without becoming a monster to live with. The NIU KQi1 Pro still makes sense if your rides are short, your budget is tight, and you want something compact and reassuringly simple that you can throw under a desk without thinking.
Choose the NIU if you're mostly doing a few flat kilometres in the city, value a tidy design and decent app, and don't mind charging more often. Choose the SoFlow if you actually commute proper distances, hate range anxiety, and want extra climbing power even if that means a bit more weight and a long overnight charge.
If you want to understand where each one quietly annoys you after a few months of ownership, keep reading - that's where the real decision is made.
Commuter scooters have grown up. What used to be flimsy toys with folding stems that felt like they'd snap at the first pothole are now genuine daily transport. The NIU KQi1 Pro and the SOFLOW SO2 AIR MAX sit right in that "serious but still affordable" middle ground - the place where people stop playing and start replacing car or public transport trips.
I've spent more than enough kilometres on both to know exactly where they shine and where the marketing gloss flakes off. One is a compact, sensible "station hopper" that tries hard to feel more premium than its price. The other hides a very large battery in a still-manageable frame and quietly laughs at the idea of "range anxiety".
If you're wondering which of these two semi-sensible scooters deserves a semi-permanent place in your hallway, let's dive in.
Who Are These For, and Why Compare Them?
On paper, these scooters target a similar rider: urban or suburban commuters who want something roadworthy, not ridiculous, at a price that doesn't require selling a kidney. Both sit in the lower-to-mid price bracket - well below "crazy fast" machines, but above the disposable supermarket stuff.
The NIU KQi1 Pro is best thought of as an upgraded "last-mile" tool. Shorter daily distances, mostly flat, lots of folding and carrying, regular indoor storage. It's for people who see their scooter as an accessory to public transport, not a full replacement.
The SOFLOW SO2 AIR MAX, meanwhile, stretches that definition. With its big battery and stronger motor, you can actually commute proper distances without immediately scanning for power sockets. It edges towards being a stand-alone vehicle, yet doesn't cross into the heavyweight, 25+ kg territory that scares most normal humans.
They overlap for people who want: road-legal speeds, decent safety features, and something you can still haul up a staircase without writing a gym membership into your will. That's why it's a fair comparison: one is a short-distance specialist, the other is a long-distance generalist that still tries to stay civilised.
Design & Build Quality
Both brands know how to make a scooter feel like a product rather than a random AliExpress kit, but they go about it differently.
The NIU KQi1 Pro is very "consumer electronics meets scooter". Smooth, rounded shapes, neat cable routing, and that signature halo headlight give it a cohesive, almost moped-inspired vibe. In the hand, the frame feels solid enough, and the folding latch locks in with a reassuring click. It avoids the "rattly toy" feeling that plagues cheaper models, despite not being wildly premium either.
The SOFLOW SO2 AIR MAX looks more like a grown-up tool. Straighter lines, slightly more industrial feel, and those 10-inch tyres visually anchor the scooter. The stem is clean thanks to internal cable routing, and the integrated display with NFC reader looks more modern than the NIU's simple colour LED unit. If the NIU is the tidy student flat, the SoFlow is the sensible office - neither is luxury, but both are organised.
In pure build feel, the SoFlow edges ahead. The frame feels beefier, the deck slightly more substantial, and the components (brakes, switches, lighting) give off a more "commuter workhorse" impression. The NIU counters with slightly better finishing details and that very solid-feeling fold - but overall, the SoFlow feels like it's been built to cope with longer, rougher use.
Ride Comfort & Handling
Neither of these scooters has real suspension, so your knees remain the only shock absorbers on duty. Comfort comes down to tyres, geometry and how the chassis behaves when the asphalt inevitably turns into a patchwork of city repairs.
The NIU KQi1 Pro rolls on smaller 9-inch air-filled tyres. On fresh tarmac, it feels nimble and light-footed, almost playful. The wide handlebars help keep it stable and predictable, and low-speed manoeuvring around pedestrians or tight corners is easy. But once you hit rougher pavements or patched-up cycle lanes, you start to feel its lightweight, rigid nature. After a few kilometres of cobblestones, your hands and knees know exactly how cheap the scooter class is.
The SOFLOW SO2 AIR MAX, with its larger 10-inch pneumatic tyres, simply has more rubber and air between you and the misery. It still doesn't float like a true suspended scooter, but it handles broken pavement, expansion joints and mild cobbles with more composure. At its governed top speed it feels planted rather than skittish, and the extra wheel size gives you more confidence to roll over cracks instead of picking your line like a tightrope walker.
Handling-wise, the NIU turns in a bit quicker, which is fun in tight city slaloms but can feel twitchy on rough ground. The SoFlow is calmer, more "point and forget". For short, smooth city rides, the NIU's lightness is pleasant. For any commute where roads are "municipal budget optional", the SoFlow is kinder to your joints.
Performance
Let's be clear: neither of these is a rocket ship. They're both legally capped, and that's fine. But the experience of getting up to that capped speed - and staying there, especially uphill - is where they diverge.
The NIU KQi1 Pro has a modest rear hub motor tuned for gentle, predictable acceleration. From a standstill to city pace, it does the job, but you're not exactly leaving cyclists in open-mouthed awe. On flat ground it reaches and holds its legal limit without fuss, and the control software is nicely smoothed - no jerky surges, just a linear pull. On mild inclines it copes, but heavier riders will notice it bogging down sooner rather than later.
The SOFLOW SO2 AIR MAX, by contrast, just feels more muscular. Its motor has far more nominal power and a much higher peak. You still top out at a slightly lower legal maximum, but the way you get there is noticeably more decisive. It pulls more confidently from traffic lights, and hills that make the NIU wheeze are taken with more resolve. You will still slow down on steeper climbs, but you're far less likely to end up doing the embarrassing foot-assisted shuffle.
Braking performance on both is surprisingly good for their class. Drum plus regenerative on the NIU gives a smooth, progressive deceleration that suits newer riders and wet conditions. The SoFlow's front drum plus stronger electronic rear braking feels slightly more authoritative at higher speeds and with heavier loads. In real city use, I'd trust both, but the SoFlow's overall power-to-brake balance feels more grown-up.
Battery & Range
This is the section where the NIU KQi1 Pro politely looks away while the SOFLOW SO2 AIR MAX clears its throat.
The NIU carries a small battery that is absolutely fine for genuine last-mile work or short inner-city hops. In real life, think a couple of commutes of a few kilometres each way before you start scanning for a socket. If your daily pattern is station-office-home with a detour for lunch, it's workable, but you're charging more nights than not. Range anxiety is not dramatic, but it's never entirely off your mind either.
The SoFlow, on the other hand, has a battery that belongs in the next scooter class up. Real-world riding with a normal-weight rider and mixed terrain still gets you many tens of kilometres. For typical urban commuting distances, you're realistically charging once or twice a week rather than every day. You stop thinking in "percentage left to get home" and start thinking in "eh, I'll charge it tomorrow". It's a fundamentally different ownership experience.
The trade-offs: the NIU's smaller pack charges in a typical evening or afternoon - not fast, but acceptable for its size. The SoFlow's large battery needs a proper overnight session. Quick top-ups during a coffee stop are basically symbolic. So, yes, marathon range, but you need to plan your charging window. If you're the person who always forgets to plug things in, both will punish you, but the SoFlow at least gives you more forgiveness between mistakes.
Portability & Practicality
Both scooters are still in what I'd call "carryable without swearing at life" territory, but you do feel the difference.
The NIU KQi1 Pro is clearly tuned for multi-modal reality: stairs, train doors, office corridors. It's lighter, folds down quickly, and the folded package is compact enough to tuck beside a desk or in a tight flat. Carrying it up a couple of flights is doable for most adults without turning it into a workout. If your commute involves frequent lifting or tight storage, the NIU shape and weight are more forgiving.
The SOFLOW SO2 AIR MAX is only a few kilos heavier on paper, but those kilos are in a larger chassis and bigger wheels. That matters in the hand. Carrying it up one flight is fine; several floors and you'll start negotiating with the lift more seriously. Folded, it takes up more room, especially in length. It's still realistic for trains, car boots and hallways, just less "invisible" than the NIU.
On the flip side, the SoFlow gives you more practicality once actually rolling: it tolerates rougher surfaces, carries heavier riders, and shrugs off wet commutes better. The NIU's practicality shines in portability and sheer "easy to stash" behaviour; the SoFlow's practicality is in how much daily work it can actually do before needing a rest.
Safety
Both scooters tick the main commuter safety boxes, but the SoFlow quietly pushes ahead where it matters to daily riders.
The NIU KQi1 Pro has that distinctive halo headlight which is excellent for being seen and decent for seeing, especially at city speeds. The braking system is well judged - drum plus regen means reliable stopping even in drizzle, with minimal maintenance. Tyres are air-filled, so grip on wet surfaces is far better than the cheap solid-tyre crowd, and the chassis feels stable at its limited speed, at least on reasonable surfaces.
The SOFLOW SO2 AIR MAX takes lighting more seriously. That much brighter headlight actually illuminates the road texture ahead rather than just announcing your presence. The handlebar indicators are a genuinely useful safety feature in mixed traffic, especially if you ride among cars and fast bicycles. Bigger 10-inch tyres give you more grip and stability on dodgy tarmac, and the higher water-resistance rating means you're less worried when the heavens open halfway home.
Both braking systems are trustworthy, but with more motor power and more robust front braking, the SoFlow feels calmer and more in control when you have to stop hard from its top speed, especially with a heavier rider on board. If your riding includes wet nights, mixed traffic and less-than-perfect surfaces, the SoFlow is the safer-feeling package.
Community Feedback
| NIU KQi1 Pro | SOFLOW SO2 AIR MAX |
|---|---|
What riders love
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What riders love
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What riders complain about
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What riders complain about
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Price & Value
Both scooters try to play the value game, just in different leagues.
The NIU KQi1 Pro comes in cheaper and feels decently put together for an entry-level commuter. You're paying for a known brand, a decent app, and enough build quality that you don't feel like you bought a disposable gadget. If your needs are genuinely short-range and you don't care about big power or battery, the NIU's price is fair - you're not overpaying for hardware you'll never use.
The SOFLOW SO2 AIR MAX asks for a bit more money, but in return gives you roughly "big-boy scooter" battery capacity and motor grunt at a still-manageable weight. On a pure "range per euro" or "performance per euro" basis, it's frankly hard to argue against. If you actually use that extra range - longer commutes, multiple daily trips - the SoFlow quickly looks like better value than buying a smaller scooter and constantly flirting with empty.
If your daily riding is truly minimal, the NIU saves you money up front. If you commute seriously or hate planning around charging, the SoFlow's slightly higher price is very easy to justify.
Service & Parts Availability
Service is where the theory of ownership meets the cold reality of broken parts and warranty claims.
NIU has the advantage of a larger, more established network. Their background in electric mopeds means dealers, parts pipelines and general brand presence are already in place in much of Europe. Community reports tend to praise NIU for decent warranty handling and reasonable spare-part availability - not perfect, but above the usual budget-scooter mess.
SoFlow is a recognised brand in the DACH region, but feedback on after-sales support is... let's say "less glowing". Riders report slow responses, difficulties with parts, and a general feeling that once you leave the showroom, you're somewhat on your own unless your retailer steps up. If you're handy with tools or have a good local shop, this can be mitigated, but it's not a strong point.
In terms of pure service confidence, NIU clearly has the edge. With the SoFlow you're paying for hardware strength, not for hand-holding if something goes wrong.
Pros & Cons Summary
| NIU KQi1 Pro | SOFLOW SO2 AIR MAX |
|---|---|
Pros
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Pros
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Cons
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Cons
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Parameters Comparison
| Parameter | NIU KQi1 Pro | SOFLOW SO2 AIR MAX |
|---|---|---|
| Motor power (rated) | 250 W | 500 W |
| Top speed | 25 km/h | 20 km/h |
| Claimed range | 25 km | 80 km |
| Realistic range (approx.) | 15-18 km | 45-60 km |
| Battery energy | 243 Wh | 626,4 Wh |
| Battery voltage / capacity | 48 V / 5,1 Ah | 36 V / 17,4 Ah |
| Weight | 15,4 kg | 17,8 kg |
| Brakes | Front drum + rear regen | Front drum + rear electronic (regen) |
| Suspension | None | None (rely on tyres / sprung steering) |
| Tyres | 9" pneumatic | 10" pneumatic |
| Max load | 100 kg | 120 kg |
| Water resistance | IP54 | IP65 |
| Charging time | 5-6 h | 9 h |
| Approx. price | 420 € | 477 € |
Final Verdict - Which Should You Choose?
If you strip away the spec sheets and look at how these scooters actually live with you, the SOFLOW SO2 AIR MAX is the more complete machine for most riders. It covers far more distance per charge, handles heavier riders and worse roads with more confidence, and has safety touches - especially the lighting - that you appreciate every dark, wet weekday you don't feel like cycling.
The NIU KQi1 Pro, though, still has a place. If you're on a tighter budget, travel only a handful of kilometres a day, and need something you can lift, fold and hide in a city flat, it remains a sensible, no-nonsense option. It's the scooter you buy when your needs are modest and clearly defined.
But if you're at all unsure how far your scooter life will take you - if maybe today's "short" commute becomes tomorrow's "actually I'll skip the train" - the SO2 AIR MAX gives you far more headroom before you outgrow it. You sacrifice some portability and put up with slow charging and weaker support, but in return you get a scooter that feels less like a compromise and more like genuine daily transport.
Numbers Freaks Corner
| Metric | NIU KQi1 Pro | SOFLOW SO2 AIR MAX |
|---|---|---|
| Price per Wh (€/Wh) | ❌ 1,73 €/Wh | ✅ 0,76 €/Wh |
| Price per km/h of top speed (€/km/h) | ✅ 16,80 €/km/h | ❌ 23,85 €/km/h |
| Weight per Wh (g/Wh) | ❌ 63,37 g/Wh | ✅ 28,43 g/Wh |
| Weight per km/h (kg/km/h) | ✅ 0,62 kg/km/h | ❌ 0,89 kg/km/h |
| Price per km of real-world range (€/km) | ❌ 25,45 €/km | ✅ 9,09 €/km |
| Weight per km of real-world range (kg/km) | ❌ 0,93 kg/km | ✅ 0,34 kg/km |
| Wh per km efficiency (Wh/km) | ❌ 14,73 Wh/km | ✅ 11,93 Wh/km |
| Power to max speed ratio (W/km/h) | ❌ 10,00 W/km/h | ✅ 25,00 W/km/h |
| Weight to power ratio (kg/W) | ❌ 0,062 kg/W | ✅ 0,036 kg/W |
| Average charging speed (W) | ❌ 44,18 W | ✅ 69,60 W |
These metrics look at how efficiently each scooter turns euros, weight and energy into speed, range and practicality. Price-per-Wh and price-per-kilometre show how much "battery and distance" you buy for your money. Weight-based metrics tell you how much scooter you carry for each unit of performance. Efficiency (Wh/km) reflects how gently the scooter sips from the battery. Power-to-speed and weight-to-power ratios hint at how lively the scooter feels, while average charging speed indicates how quickly energy flows back into the pack relative to its size.
Author's Category Battle
| Category | NIU KQi1 Pro | SOFLOW SO2 AIR MAX |
|---|---|---|
| Weight | ✅ Lighter, easier to haul | ❌ Heavier to carry upstairs |
| Range | ❌ Short for serious commutes | ✅ Easily covers long days |
| Max Speed | ✅ Higher legal top speed | ❌ Slower, 20 km/h cap |
| Power | ❌ Weak on hills | ✅ Noticeably stronger motor |
| Battery Size | ❌ Small pack, limited trips | ✅ Big pack, weekly charging |
| Suspension | ❌ No suspension at all | ❌ Also rigid, tyre-only comfort |
| Design | ✅ Clean, moped-inspired styling | ❌ Functional but less charming |
| Safety | ❌ Adequate but basic package | ✅ Better lights, tyres, rating |
| Practicality | ✅ Great for multi-modal use | ❌ Less friendly to carry daily |
| Comfort | ❌ Small wheels, harsher ride | ✅ Bigger tyres, calmer feel |
| Features | ❌ Basic display, simple app | ✅ NFC, indicators, rich app |
| Serviceability | ✅ Better dealer and parts net | ❌ Parts and help harder |
| Customer Support | ✅ Generally responsive, structured | ❌ Mixed, often frustrating |
| Fun Factor | ❌ Runs out of steam fast | ✅ Power and range to explore |
| Build Quality | ✅ Tight, well-finished frame | ❌ Solid but some rattles |
| Component Quality | ✅ Consistent, mature choices | ❌ Good, but more variable |
| Brand Name | ✅ Stronger, better established | ❌ Smaller, patchier image |
| Community | ✅ Larger, more user feedback | ❌ Smaller, less shared info |
| Lights (visibility) | ❌ Good but not outstanding | ✅ Very bright, indicators |
| Lights (illumination) | ❌ Enough for city only | ✅ Proper night visibility |
| Acceleration | ❌ Mild, adequate only | ✅ Zippy, confident starts |
| Arrive with smile factor | ❌ Fine, but unexciting | ✅ Range and power feel liberating |
| Arrive relaxed factor | ❌ Battery worries on longer trips | ✅ Little to no range anxiety |
| Charging speed (experience) | ✅ Shorter full refill window | ❌ Very long overnight charges |
| Reliability | ✅ Strong track record | ❌ Some QC and support issues |
| Folded practicality | ✅ Smaller, easier to stash | ❌ Bulkier footprint folded |
| Ease of transport | ✅ Better for stairs, trains | ❌ Ok, but weighty |
| Handling | ❌ Twitchier, less composed rough | ✅ Planted, better stability |
| Braking performance | ❌ Adequate, not inspiring | ✅ Strong, confidence-inspiring |
| Riding position | ✅ Comfortable for short hops | ✅ Comfortable on long rides |
| Handlebar quality | ✅ Wide, stable feel | ❌ Fine, but less character |
| Throttle response | ✅ Smooth, friendly mapping | ✅ Strong, yet controllable |
| Dashboard / Display | ❌ Simple, functional only | ✅ Modern, more informative |
| Security (locking) | ❌ Basic electronic lock only | ✅ NFC adds real deterrent |
| Weather protection | ❌ Adequate, but cautious rain | ✅ Higher IP, better for wet |
| Resale value | ✅ Stronger brand helps resale | ❌ Support reputation hurts |
| Tuning potential | ❌ Limited headroom, small pack | ✅ More motor and battery room |
| Ease of maintenance | ✅ Common parts, better docs | ❌ Parts, guides less accessible |
| Value for Money | ❌ Good, but narrowly focused | ✅ Strong for serious commuters |
Overall Winner Declaration
In the Numbers Freaks Corner, the NIU KQi1 Pro scores 2 points against the SOFLOW SO2 AIR MAX's 8. In the Author's Category Battle, the NIU KQi1 Pro gets 19 ✅ versus 21 ✅ for SOFLOW SO2 AIR MAX.
Totals: NIU KQi1 Pro scores 21, SOFLOW SO2 AIR MAX scores 29.
Based on the scoring, the SOFLOW SO2 AIR MAX is our overall winner. Between these two, the SOFLOW SO2 AIR MAX simply feels more like a grown-up partner for real-world commuting. Its range and stronger motor let you relax, take detours, and trust the scooter to keep up with your days rather than constantly planning around its limits. The NIU KQi1 Pro stays relevant if your world is compact and predictable, but once your rides stretch beyond the most modest city errands, the SoFlow becomes the scooter that actually fits the life you're trying to live, not just the distance between your flat and the nearest tram stop.
That's our verdict when we try to stay objective – but hey, riding is mostly about emotions anyway, so pick the one that will make you look forward to your commute every single day.

