Fast Answer for Busy Riders ⚡ (TL;DR)
The Dualtron Ultra still feels like the more coherent package for most riders: lighter, a bit more honest about what it is, and brutally effective both on-road and off-road if you don't mind its quirks and ageing personality. The Dualtron Storm New EY4 fights back with a bigger, removable battery, a much more modern cockpit, stronger lighting and better wet-weather peace of mind, making it the more practical "vehicle replacement" if you live with stairs or shared garages.
Pick the Storm New EY4 if you want tech, convenience and long-distance road cruising with indoor charging and you rarely lift your scooter. Go for the Ultra if you care more about raw fun, a (relatively) more manageable weight and that classic, unfiltered Dualtron feel - especially if you ride mixed terrain.
Both demand respect and both are far from perfect; keep reading to find out which set of compromises matches your daily reality.
Hyper-scooters used to be simple: take a metal plank, bolt on as much power as the controllers will tolerate, call it a day. The Dualtron Ultra is very much a child of that era - the original hooligan that proved scooters could run with traffic and tear up forest tracks without bursting into flames every other weekend.
The Dualtron Storm New EY4 is from a different generation. On paper it's the more grown-up successor: bigger battery, removable pack, fancier EY4 display, stronger lights, more water protection. In practice, it feels like Minimotors tried to turn a track toy into a car substitute... with mixed success.
If you're hovering between these two, you're clearly not shopping for a dainty last-mile toy. You want something that can replace a fair chunk of your car mileage, or your motorbike, and still make you grin. Let's dig into where each one actually delivers - and where the marketing gloss starts to crack.
Who Are These For, and Why Compare Them?
Both scooters sit in that slightly absurd category of machines that can keep up with city traffic and then keep going until your legs, not the battery, are the limiting factor. Prices land in the "premium e-bike / cheap motorbike" region, so you're not choosing between toys; you're choosing between serious vehicles that just happen to fold (sort of).
The Storm New EY4 targets the modern performance commuter: someone doing long suburban or inter-urban runs, maybe without a private garage, who needs a removable battery and likes their tech. It's a high-speed road cruiser first, everything else second. "Best for power users who live in flats and want one scooter to replace the car most days."
The Ultra, meanwhile, is the OG hooligan: slightly lighter, simpler, more off-road-friendly, and less obsessed with creature comforts. It's for the rider who wants a bombproof frame, brutish acceleration and enough range for all-day silliness, and who is willing to live with a few old-school annoyances. "Best for riders who value raw fun and mixed terrain over fancy displays and removable bits."
They overlap heavily in power and range, live in a similar price bracket, and come from the same brand. So the real question isn't "which is stronger?" It's "which flavour of overkill actually fits your life?"
Design & Build Quality
In the flesh, both look like they were shipped from a dystopian future, but they take slightly different design routes.
The Storm New EY4 feels more like a finished product than a science experiment. The frame is still the familiar industrial Dualtron block of aluminium, but with a neater silhouette: wide handlebars, a big colour display that finally looks like it belongs in this decade, integrated footrest hiding the controller, and organised cabling by Dualtron standards. The removable deck-battery gives the whole chassis a "battery sled" vibe - it's obvious the scooter was designed around that idea, for better and worse.
The Ultra, especially in its newer 72V guises, looks rawer. More exposed bolts, knobbier tyres, fewer flourishes. You get the distinct impression that aesthetics were discussed after motor and battery decisions, not before. It's functional, solid, and not remotely subtle. If the Storm looks like a cyberpunk cruiser, the Ultra looks like someone put handlebars on a small artillery piece.
In hand, both frames feel properly overbuilt. The Storm's updated folding system is beefier and less wobbly than early Dualtrons; the hinge locks with more confidence, and the wider bars help it feel like a single solid piece at speed. The Ultra's collar-style clamp is strong but more notorious for developing play if you don't keep on top of it. You can reinforce it with aftermarket bits, but out of the box the Storm's front end simply feels more "sorted".
Component quality is broadly similar: decent hydraulics, familiar Dualtron hardware, and the usual mix of metal tank-like main parts with a few plasticky touches that feel cheaper than the price tag. Neither feels truly premium the way some boutique brands now do, but both feel like they'll survive thousands of kilometres of abuse if you give them basic care.
Ride Comfort & Handling
Both scooters use Minimotors' rubber cartridge suspension, so if you're imagining floaty, armchair plushness, prepare for a reality check. This is "sports suspension", not sofa mode.
On the Storm New EY4, the ride leans heavily towards the firm, planted side. On smooth tarmac, it's excellent: stable, direct, with very little pitching or wallowing even at speeds where your brain starts questioning your life choices. Hit a stretch of bad city cobbles or broken asphalt and, after a few kilometres, your knees will absolutely file a complaint. The mass of the scooter helps it bully its way through a lot of small imperfections, but deep potholes still punch through more than they would on a coil-shock rival.
The Ultra is similar in baseline stiffness but feels a bit more alive and playful. With the stock knobby tyres, it has a tiny bit more "give" on loose surfaces - gravel, dirt and forest tracks - where the knobs deform and help the suspension. On sharp city edges it's no more comfortable than the Storm, and on fresh tarmac it can actually feel more nervous until you get used to the tyre pattern hum and small twitchiness from those off-road blocks. Swap to road tyres and the Ultra settles down noticeably and edges a bit closer to the Storm's composed, planted feel.
Handling-wise, the Storm's wider bars and revised geometry give it a calmer, more confidence-inspiring front end at speed. It resists wobbles better, giving you that "locked in" feeling when you're sweeping through faster corners. The Ultra feels a touch more agile and playful, especially off-road, but also more prone to the classic Dualtron headshake if your clamp or headset aren't perfectly dialled or you're heavy-braking at speed.
If your riding is 90% fast road and you value stability above everything, the Storm has the edge. If you like flicking the scooter around, hopping onto trails, and you're happy to tune out a bit of wobble and tyre noise, the Ultra's character is arguably more fun.
Performance
No one buys either of these to go slowly, and both deliver the kind of acceleration that will make your average rental scooter spontaneously burst into tears.
The Storm New EY4 is the torque bully of the pair. Its high-voltage system and more modern control hardware give you a very assertive shove from standstill and a relentless pull well into speeds where you really want smooth asphalt and a clear horizon. It has that "freight train" feel - you roll on, it hunkers down and just keeps piling on speed. The EY4 display lets you tame the beast somewhat, softening initial response so you're not jerked forward the moment you think about throttle.
The Ultra, especially the 72V versions, is more old-school savage. Acceleration is a little less refined but no less dramatic. Stab the throttle in dual-motor turbo and it practically dares you to fall off the back. It's the kind of punch that makes you lean aggressively over the bars and consciously brace. At typical city speeds it feels every bit as fast as the Storm; you only really notice the Storm's extra headroom when you're stretching both scooters out on a long, clear run.
Hill climbs are a non-issue for both. Any paved incline you'd reasonably want to ride, they simply flatten. Heavier riders will appreciate that neither bogs down the way mid-tier scooters do - you still have meaningful acceleration going uphill. The Storm's improved cooling does help maintain performance over long, hot runs a bit more consistently, but in everyday use, you're unlikely to feel either motor system "giving up" unless you're really abusing them.
Braking on both is strong and reassuring once you've dialled in your preferences. Hydraulic discs with large rotors, backed by motor braking, haul these beasts down from scary speeds in a hurry. The Storm's setup feels a touch more modern and progressive; the Ultra's can feel slightly more abrupt and "bitey" on loose surfaces, especially with off-road tyres, where it's easier to overwhelm grip if you panic-grab a lever.
In pure, straight-line performance, the Storm is the more serious, high-speed machine. In terms of seat-of-the-pants fun and drama from zero to "this is fast enough thanks", the Ultra gives away far less than you'd expect.
Battery & Range
Both scooters live in the "range anxiety is other people's problem" tier, but they go about it differently.
The Storm New EY4 packs a truly monstrous battery built from high-end cells, and you feel it. On moderate riding - traffic-flow speeds with the occasional indulgent blast - you can easily cover distances that would leave most commuter scooters begging for a charger. Ride like a lunatic, full power all the time, and you still end up with a genuinely useful range, not just a short-lived thrill ride. The big advantage is psychological: you can do a long round trip in nasty headwinds and still have enough in reserve not to start counting percentage points obsessively.
The Ultra isn't far behind. Its larger-capacity versions will also give you long rides that outlast your legs, particularly if you show some restraint. At aggressive speeds the real-world difference between them isn't night and day; the Storm nudges ahead, but both comfortably beat almost any "normal" scooter. The Ultra's higher-end packs keep their punch deeper into the discharge too, so you don't feel that frustrating "half battery, half power" syndrome you get on cheaper 60V machines.
Charging is where the Storm claws back some practicality. Thanks to included fast charging and that removable pack, it's surprisingly usable for daily cycle: ride hard, lug the pack upstairs, plug in at home or work, and you're topped up again by evening. The Ultra's stock charging arrangement is more of a patience game. Unless you invest in fast chargers, a big charge is an overnight-plus job, and even with faster charging you're still tied to wherever the scooter itself is parked.
If range is your top priority and you want the easiest charging routine, the Storm has the upper hand. If you're fine planning overnight charges and you don't need to remove the battery, the Ultra is still plenty capable for long-range use.
Portability & Practicality
Let's be honest: neither of these is "portable" in the normal sense. Folding is for storage and car transport, not for hopping on a tram.
The Storm New EY4 is brutally heavy. You feel every kilo when you try to lift the front to get over a curb, or manoeuvre it in a tight hallway. Carrying it up more than a token flight of stairs is a full-body workout - and not a pleasant one. The folding mechanism is stiff but reassuring; once folded, it still occupies a lot of floor space and is awkward to drag into lifts or small car boots. The only real nod to practicality is that removable pack: you can park the frame downstairs and just take the battery indoors, sparing you the worst of the weight repeatedly.
The Ultra is no featherweight either, but it is noticeably less punishing to wrestle with. Getting it into a car, or up a short flight of stairs, feels just about doable for a reasonably fit adult. The folded footprint is similar, but the lower mass simply makes everything less of a chore. The collar folding system is slightly more fiddly than the Storm's sturdier clamp, and it rewards careful setup, but once you've learned its mood, living with it day-to-day is manageable.
Day-to-day commuting practicality? The Storm has better built-in lights, turn signals, and a more weather-tolerant cockpit with its higher water protection rating and sealed display. That makes it more confidence-inspiring as a true daily, all-season vehicle. The Ultra is more "big toy that can commute if you want it to" - you'll likely add better lights, maybe some weatherproofing tweaks, and accept a bit more compromise.
If you have to lift the scooter regularly, the Ultra is the lesser evil. If you mainly roll in and out of lifts, garages and bike rooms, the Storm's battery system and modern road gear make more sense.
Safety
On something this fast, safety is mostly a question of: does it stay stable when you do stupid things, and can it stop you in time when you regret them?
The Storm New EY4 scores solidly here. The wider bars, stiff chassis and refined geometry make it impressively composed at speeds where many older scooters feel skittish. The beefy hydraulic brakes, backed by adjustable motor braking, give strong, predictable stopping. Most importantly, the lighting is finally up to the job: proper, bright front lamps that let you see the road ahead, decent rear and side visibility, and integrated indicators so you're not doing hand-signal yoga in the dark. Add the improved water resistance (body and display) and it's a scooter you can rely on in more conditions without feeling like you're tempting fate.
The Ultra's braking is also very strong, and its wide tyres give a great sense of grip and stability once you're up to speed. But there are caveats. The stock headlight positioning and power are, frankly, outdated for a scooter this quick; night-time high-speed runs really demand an extra bar-mounted light. The infamous potential for stem wobble if the clamp isn't tuned perfectly is another factor: it's manageable and fixable, but it does mean an extra layer of mechanical vigilance. On wet asphalt, those knobby tyres can also feel a bit edgy - loads of grip on dirt, but a smaller, more squirmy contact patch on shiny tarmac.
Put simply: both can be safe if you respect them, but the Storm arrives closer to "ready out of the box", while the Ultra expects you to know what you're doing and to add a couple of bits to make it truly confidence-inspiring in all conditions.
Community Feedback
| Aspect | Dualtron Storm New EY4 | Dualtron Ultra |
|---|---|---|
| What riders love | Removable battery, brutal torque, high-speed stability, modern EY4 cockpit, strong lighting, solid brakes, tank-like frame, good parts availability. | Legendary power, bombproof frame, excellent off-road ability, strong range, huge community, good resale value, wide deck, powerful brakes. |
| What riders complain about | Excessive weight, stiff suspension on bad roads, jerky low-speed throttle, so-so kickstand, maintenance on folding parts, stiff ride for city potholes, premium price. | Stem wobble if neglected, weight still high, weak stock headlight, long charging on basic charger, stiff suspension, loud knobby tyres, general need for more maintenance than casual users like. |
Price & Value
Both land squarely in "serious money" territory. Neither is what you'd call cheap, and neither feels quite as premium in the hand as the price might suggest - a familiar Dualtron theme.
The Storm New EY4 usually costs a bit more than the Ultra, and what you're really paying for is that removable battery, modern display, better integrated lights and slightly more refined chassis. If you will actually use the removable battery - indoor charging, maybe a spare pack one day - that premium can make sense. If you won't, you're effectively paying extra for features you'll quietly ignore while dragging around more mass.
The Ultra, while still expensive, tends to sit in a sweeter spot for people who just want performance per euro and don't care if the scooter looks or feels slightly dated. You get a big branded battery, huge power and long range at a price that undercuts the flashier flagships while delivering most of the ride experience. Factor in strong resale and a massive second-hand market and it often works out as a better "value experiment" if you're not sure you'll stay in the hyper-scooter game long term.
Boiled down: if you genuinely need the Storm's modern conveniences, its price is defensible. If you're more about the ride than the gadgets, the Ultra gives you similar grins for less outlay.
Service & Parts Availability
Both benefit from the same core advantages: they're Dualtrons. That means distributors across Europe, decent access to warranty support (dependent on your dealer, as always), and plentiful third-party shops who know them inside out.
The Storm New EY4, being newer, enjoys easy access to current-generation parts - EY4 display, specific clamps, battery modules. The removable pack design also simplifies certain repairs: a dead battery swap is more like replacing a giant laptop pack than surgery on a sealed deck. On the flip side, that same design means a more complex, expensive single component if you ever need to replace the entire pack.
The Ultra has longevity on its side. It's been around in various forms for years, which means an abundance of guides, upgrade parts, and used components floating around. Tons of mechanics have already rebuilt, modded and abused them, so "tribal knowledge" is huge. You might have to pay attention to version compatibility (60V vs 72V, older vs upgrade parts), but you're rarely stuck.
For pure serviceability and community knowledge, the Ultra still holds the slight edge. For straightforward parts ordering through official channels, both are well covered.
Pros & Cons Summary
| Dualtron Storm New EY4 | Dualtron Ultra | |
|---|---|---|
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Parameters Comparison
| Parameter | Dualtron Storm New EY4 | Dualtron Ultra |
|---|---|---|
| Motor power (peak) | ca. 11.500 W dual hub | ca. 6.640 W peak dual hub |
| Top speed | ca. 88-100 km/h (unrestricted) | ca. 80-100 km/h (version-dependent) |
| Battery | 72 V 35 Ah, ca. 2.520 Wh, removable LG 21700 | 60-72 V, 32-40 Ah, ca. 1.920-2.880 Wh LG |
| Claimed range | up to ca. 144 km (eco) | up to ca. 100-120 km (eco) |
| Real-world range (fast riding) | ca. 70-90 km (hard use ca. 50-60 km) | ca. 60-70 km (aggressive use) |
| Weight | ca. 55,3 kg | ca. 45,8 kg (upper end) |
| Max load | ca. 150 kg | ca. 150 kg |
| Brakes | NUTT hydraulic discs + magnetic ABS | Hydraulic discs + electric ABS |
| Suspension | Front & rear rubber cartridge, adjustable | Front & rear rubber (PU) cartridge |
| Tyres | 11-inch ultra-wide tubeless road tyres | 11-inch ultra-wide off-road knobby tyres |
| Water resistance | IPX5 body, IPX7 display | No formal high IP rating stated |
| Charging time (fast) | ca. 5-6 h (fast charger included) | ca. 5-6 h (optional fast charger) |
| Approx. price | ca. 3.587 € | ca. 3.314 € |
Final Verdict - Which Should You Choose?
Both the Dualtron Storm New EY4 and the Dualtron Ultra are serious, overpowered slabs of metal with enough performance to replace a car for many trips. Neither is graceful, both are flawed, and that's oddly part of their charm.
If you see your scooter as a daily vehicle - long commutes, all-weather riding, lots of night-time use - the Storm New EY4 quietly edges ahead. The removable pack solves the "I live in a flat" problem, the lights are finally up to speed, the cockpit feels contemporary, and the chassis is more composed at the kind of speeds where lesser scooters start to feel like dice throws. You pay in weight and money, but you get a more "complete" big-scooter experience out of the box.
If, however, you're in it primarily for the thrill - big power, big range, mixed road and trail use - and you don't care that the scooter looks and behaves like an older design, the Ultra still makes a lot of sense. It's a little easier to live with physically, a little kinder to your wallet, and backed by a huge community that's already tried every possible way to break and fix it.
Viewed coldly, the Storm New EY4 is the more modern machine. Viewed as a rider, the Ultra remains the one that feels more honest about what it is: a slightly ridiculous, immensely fun brute that doesn't pretend to be a polished, do-everything commuter. Choose the Storm if you want your scooter to behave like a vehicle. Choose the Ultra if you want it to behave like a sport toy that just happens to commute very, very well.
Numbers Freaks Corner
| Metric | Dualtron Storm New EY4 | Dualtron Ultra |
|---|---|---|
| Price per Wh (€/Wh) | ❌ 1,42 €/Wh | ✅ 1,38 €/Wh |
| Price per km/h of top speed (€/km/h) | ❌ 37,75 €/km/h | ✅ 36,82 €/km/h |
| Weight per Wh (g/Wh) | ❌ 21,94 g/Wh | ✅ 19,08 g/Wh |
| Weight per km/h (kg/km/h) | ❌ 0,58 kg/km/h | ✅ 0,51 kg/km/h |
| Price per km of real-world range (€/km) | ✅ 44,84 €/km | ❌ 50,98 €/km |
| Weight per km of real-world range (kg/km) | ✅ 0,69 kg/km | ❌ 0,70 kg/km |
| Wh per km efficiency (Wh/km) | ✅ 31,50 Wh/km | ❌ 36,92 Wh/km |
| Power to max speed ratio (W/km/h) | ✅ 121,05 W/km/h | ❌ 73,78 W/km/h |
| Weight to power ratio (kg/W) | ✅ 0,00481 kg/W | ❌ 0,00690 kg/W |
| Average charging speed (W) | ✅ 458,18 W | ❌ 400,00 W |
These metrics strip everything down to maths: cost versus energy, weight efficiency, energy use per kilometre, how aggressively power is packed relative to speed, and how quickly the battery can realistically be filled. Lower is better for most efficiency and cost ratios, while higher is better where we want more "performance density" (power per km/h) or faster charging. They don't tell you how either scooter feels, but they do show where each one is objectively more efficient or more densely engineered on paper.
Author's Category Battle
| Category | Dualtron Storm New EY4 | Dualtron Ultra |
|---|---|---|
| Weight | ❌ Very heavy, hard to move | ✅ Lighter, slightly easier handling |
| Range | ✅ Longer, more usable distance | ❌ Slightly less real range |
| Max Speed | ✅ Higher comfortable cruise ceiling | ❌ Slightly less headroom |
| Power | ✅ Stronger overall punch | ❌ Still powerful but milder |
| Battery Size | ✅ Bigger pack, removable | ❌ Smaller, fixed pack |
| Suspension | ❌ Firm, limited plushness | ✅ Similar but slightly friendlier |
| Design | ✅ More modern, cohesive look | ❌ Older, rougher industrial feel |
| Safety | ✅ Better lighting, stability | ❌ Needs extras, wobble risk |
| Practicality | ✅ Removable battery, road kit | ❌ Less daily-friendly overall |
| Comfort | ❌ Harsh on bad city roads | ✅ Slightly more forgiving feel |
| Features | ✅ EY4, indicators, app, IP | ❌ More basic, fewer niceties |
| Serviceability | ✅ Modular battery helps some | ✅ Simpler, well-known layout |
| Customer Support | ✅ Good via Dualtron network | ✅ Same strong Dualtron network |
| Fun Factor | ❌ Serious, slightly clinical | ✅ Raw, hooligan character |
| Build Quality | ✅ Solid, refined chassis | ❌ Strong but more primitive |
| Component Quality | ✅ Slightly more up-to-date kit | ❌ Older spec parts overall |
| Brand Name | ✅ Dualtron pedigree | ✅ Dualtron pedigree |
| Community | ✅ Large, active user base | ✅ Even bigger, longer-standing |
| Lights (visibility) | ✅ Strong, multi-angle stock lights | ❌ Needs upgrades for night |
| Lights (illumination) | ✅ Proper usable headlights | ❌ Weak beam, low placement |
| Acceleration | ✅ Harder, denser shove | ❌ Still wild, slightly less |
| Arrive with smile factor | ❌ Impressive, less playful | ✅ Grin-inducing every blast |
| Arrive relaxed factor | ✅ Stable, predictable at speed | ❌ More tiring, more drama |
| Charging speed | ✅ Fast charger included | ❌ Needs extra fast charger |
| Reliability | ✅ Improved cooling, sturdy | ✅ Proven long-term workhorse |
| Folded practicality | ❌ Heavy, awkward footprint | ✅ Slightly easier in cars |
| Ease of transport | ❌ Brutal to lift, move | ✅ Less brutal, still heavy |
| Handling | ✅ Calmer, more stable steering | ❌ Livelier, more wobble-prone |
| Braking performance | ✅ Strong, progressive feel | ❌ Strong but less refined |
| Riding position | ✅ Wide bars, roomy deck | ❌ Slightly tighter ergonomics |
| Handlebar quality | ✅ Wider, better layout | ❌ Narrower, older cockpit |
| Throttle response | ❌ Abrupt square-wave feel | ✅ Slightly more progressive |
| Dashboard/Display | ✅ EY4, bright, customisable | ❌ Older, less readable units |
| Security (locking) | ✅ Digital lock via display/app | ❌ Depends on version, basic |
| Weather protection | ✅ Better stated IP, sealed | ❌ Needs more rider caution |
| Resale value | ✅ Strong, newer desirable model | ✅ Very strong, cult classic |
| Tuning potential | ✅ Plenty, but newer platform | ✅ Huge, long-proven mods |
| Ease of maintenance | ❌ Heavier, more complex pack | ✅ Simpler frame, abundant guides |
| Value for Money | ❌ Pricey for its compromises | ✅ Better bang for performance |
Overall Winner Declaration
In the Numbers Freaks Corner, the DUALTRON Storm New EY4 scores 6 points against the DUALTRON Ultra's 4. In the Author's Category Battle, the DUALTRON Storm New EY4 gets 29 ✅ versus 17 ✅ for DUALTRON Ultra (with a few ties sprinkled in).
Totals: DUALTRON Storm New EY4 scores 35, DUALTRON Ultra scores 21.
Based on the scoring, the DUALTRON Storm New EY4 is our overall winner. Between these two, the Ultra is the one that still tugs at your inner hooligan: it's simpler, a bit more honest, and more willing to misbehave in ways that make every ride feel like a small adventure. The Storm New EY4 is the more serious, grown-up option - it does more things properly, more of the time, but it also feels a bit like it's trying to be a car on two tiny wheels. If I had to live with one, I'd lean towards the Ultra for its personality and slightly saner weight, even though the Storm wins on paper in many areas. The Storm suits riders who want their scooter to be a tool first and a toy second; the Ultra suits those who secretly want it the other way round.
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.