The Jasion Thunder is a 26″ x 4″ hardtail fat-tire ebike built for riders who want real power, big-battery range, and all-terrain capability without stepping into moto-style or dual-crown territory. Jasion positions Thunder as an “all-terrain eBike” with a claimed 30+ mph top speed, up to 80 miles of range, a 48V 18Ah (864Wh) battery, and an 1800W brushless hub motor delivering 85 Nm of torque.
A front suspension fork with lockout and adjustment, 26″ x 4″ puncture-resistant tires, and dual hydraulic disc brakes round out the package, backed by an 82 lb frame and a robust 400 lb payload rating.
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👉 See the official Jasion Thunder specs and current availability here.
TL;DR – Jasion Thunder at a Glance
| Category | Details |
|---|---|
| Bike Type | 26″ x 4″ hardtail fat-tire all-terrain ebike |
| Motor | 1800W brushless hub motor, rated at 85 Nm torque |
| Battery | 48V 18Ah (≈864Wh) removable lithium-ion pack |
| Top Speed | 30+ mph (brand claim, via PAS and throttle) |
| Claimed Range | Up to 80 miles per charge under ideal conditions |
| Realistic Range | Roughly 30–60 miles PAS and 25–45 miles throttle-heavy, depending on terrain, speed, and rider weight |
| Tires | 26″ x 4″ puncture-resistant fat tires |
| Suspension | Adjustable front suspension fork with lockout |
| Brakes | Dual hydraulic disc brakes, 180 mm rotors |
| Weight | About 82 lb (bike only) |
| Max Payload | 400 lb total weight limit |
| Best For | Riders wanting a non-folding all-terrain fat-tire ebike that can hit 30+ mph and handle trails, snow, sand, and city |
👉 Check the Jasion Thunder product page for the latest colors, specs, and bundle options.
Key Specs: Jasion Thunder Technical Overview
| Spec Category | Thunder Details |
|---|---|
| Model | Jasion Thunder |
| Ideal Use | All-terrain: city, gravel, snow, sand, light trails |
| Motor | 1800W brushless hub motor, 85 Nm torque |
| Battery | 48V 18Ah lithium-ion (≈864Wh), removable |
| Controller | 48V / 18A |
| Top Speed | 30+ mph (brand claim) |
| Claimed Range | Up to 80 miles per charge |
| Bike Weight | 82 lb |
| Total Payload | 400 lb max |
| Tires | 26″ x 4″ puncture-resistant fat tires |
| Suspension | Front suspension with lockout and adjustment, hardtail (no rear suspension) |
| Brakes | Dual hydraulic disc brakes, 180 mm rotors |
| Drivetrain | Shimano 7-speed drivetrain |
| Pedal Assist | 0–5 PAS levels, cadence sensor |
| Throttle | Twist throttle, PAS + throttle operation |
| Display | Color display, shows core ride data |
| Lights | Integrated headlight, turn signals, and brake/parking lights |
| Rider Height | Recommended 5’2″–6’3″ |
| Geometry Highlights | Wheelbase 46″, total length 74″, handlebar height ~46″, seat height 26″–39″ from floor |
Motor rating note: Jasion’s own materials aren’t perfectly consistent. The Thunder compare chart lists a 1500W peak motor, while the main Thunder product page and story sections describe a 750W base motor with up to 1800W peak output and 85 Nm torque. In this review, we follow the dedicated Thunder product page and specs and treat 1800W as the marketing peak figure with 85 Nm as the key real-world performance metric.
Design & Frame: Big, Stable All-Terrain Platform
Thunder is built as a full-size, non-folding fat-tire ebike with a focus on stability and versatility rather than compact storage.
Key design points:
- 26″ x 4″ fat tires on a longish 74″ overall length and 46″ wheelbase, giving a planted, confidence-inspiring ride at higher speeds.
- Geometry and seatpost adjustment designed for riders from 5’2″ to 6’3″.
- Hardtail frame (no rear shock) with front suspension fork to soak up hits while keeping the rear triangle stiff for cargo and payload.
- A stout rear rack included in the box, plus fenders and a kickstand—this is meant to be ready to commute or haul gear right away.
The overall aesthetic is aggressive but practical: long wheelbase, tall front end, and big tires that invite you onto dirt, snow, or sand, but still look at home in city traffic.
Motor & Speed: 1800W, 85 Nm, 30+ mph
Power is the headline with Thunder. Jasion highlights:
- 1800W brushless hub motor
- 85 Nm of torque
- 30+ mph top speed in PAS, with fast 0–20 mph acceleration
On the road, that translates to:
- Thunder behaving more like a lightweight e-moto than a mild Class 2 commuter.
- Very strong launches to 20+ mph in higher PAS levels and confident pulling power on steep hills.
- Enough overhead that even heavier riders or loaded bikes don’t feel underpowered on climbs.
Because a 30+ mph ebike sits beyond strict Class 1/2/3 limits in many regions unless electronically capped, it’s important to set speed limits and ride modes to match local regulations. For riders in markets with clear 20–28 mph caps, treating Thunder as a de-tuned Class 3 (or below) via settings is the safest way to stay compliant.
Battery, Range & Charging: 48V 18Ah, Up to 80 Miles
Thunder runs on a 48V 18Ah (864Wh) removable lithium-ion battery, frame-mounted but easy to pull for charging.
Jasion’s own numbers:
- Up to 80 miles per charge under ideal test conditions (light rider, low PAS, moderate speeds on mostly flat terrain).
- Charge time of about 7–8 hours using the included 2A charger.
Realistically, you can expect:
- Around 30–60 miles on PAS, depending on:
- How often you ride in PAS 4–5 vs lower levels
- Your average cruising speed (mid-20s vs low-20s)
- Terrain, winds, and total system weight
- Around 25–45 miles if you ride throttle-heavy and frequently push toward the upper end of the speed range.
The battery is well-sized for the motor. If you ride with a bit of restraint—mixing pedaling with mid-level PAS and avoiding wide-open throttle all the time—it’s easy to treat Thunder as a full-day adventure bike for many use cases.
Ride Comfort & Handling: 26″ x 4″ Fat Tires + Front Suspension
Thunder is built to handle snow, sand, gravel, and rough pavement:
- 26″ x 4″ puncture-resistant fat tires provide a huge contact patch and soak up chatter that would rattle a narrow-tire commuter.
- An adjustable front suspension fork with lockout helps keep the front end composed over potholes, curbs, and trail chatter.
On mixed terrain, you get:
- A very forgiving ride on broken pavement and fire roads.
- Enough damping up front to keep your hands and wrists happier on longer rides.
- The ability to lock out the fork on smooth roads for more efficient pedaling and reduced front-end bob.
Because it’s a hardtail, extremely rough off-road riding will still send some bumps through the rear of the bike, but for most all-terrain use (gravel, dirt paths, snow, sand) the combo of fat tires + front suspension is more than enough.
Brakes & Safety: Dual Hydraulics, Integrated Lighting
Thunder uses dual hydraulic disc brakes with 180 mm rotors, which is the right call on an 82 lb fat-tire bike that can exceed 30 mph.
This setup offers:
- Strong braking with less hand effort compared to mechanical discs.
- Better control and consistency on long descents or in wet weather.
- Short, predictable stopping distances when ridden within sane speeds.
On the safety feature side:
- Thunder includes an integrated headlight, turn signals, and brake/parking lights, all controlled from the bar. That makes it easier to communicate lane changes and stops in traffic, which is especially important at higher speeds.
- Jasion’s compare table lists Thunder as UL 2849 certified, and third-party reviewers also call out UL 2849 compliance. That’s a meaningful safety marker for the electrical system (battery, wiring, and electronics).
Together, the hydraulic brakes, lighting package, and UL certification make Thunder feel more like a purpose-built high-speed ebike than a budget fat-tire toy.
Controls, Display & Jasion App
Thunder’s cockpit centers around:
- A color display that shows speed, PAS level, battery status, and trip data.
- 0–5 levels of pedal assist, controlled via a cadence sensor.
- A twist throttle for instant power when you don’t want to pedal.
Jasion also promotes Jasion Smart App integration, which (based on brand info and reviewer walkthroughs) supports:
- Ride tracking (distance, time, average speed)
- Battery and trip monitoring
- Some customization of assist behavior or ride profiles
Combined with the integrated lighting, this gives Thunder a more “smart bike” feel than bare-bones fat-tire ebikes in the same power class.
Weight, Payload & Everyday Practicality
Thunder emphasizes capability over portability:
- Bike weight: about 82 lb
- Max payload: 400 lb, including rider and cargo
In daily life, that means:
- This is a bike you’ll roll, not carry. It’s fine for garages, sheds, and ground-floor apartments, but not a great option if you routinely haul a bike up multiple flights of stairs.
- The high payload rating and included rear rack make it useful for:
- Heavier riders
- Riders with loaded panniers, baskets, or camping gear
- Occasional short-hop passengers (within the 400 lb limit and where regulations permit)
If you have the storage space and want a bike that does not feel flimsy under load, Thunder’s weight and rating are assets rather than drawbacks.
Pros & Cons
Pros
- Very powerful hub motor (marketed up to 1800W with 85 Nm torque) capable of real 30+ mph performance when configured for it.
- 48V 18Ah (864Wh) battery with up to 80 miles claimed range and genuinely long legs when ridden at moderate speeds.
- 26″ x 4″ puncture-resistant fat tires plus adjustable front suspension for confident all-terrain use.
- Dual hydraulic disc brakes with 180 mm rotors, appropriate for an 82 lb, 30+ mph bike.
- Integrated headlight, turn signals, and brake/parking lights improve visibility and communication in traffic.
- 400 lb payload rating and included rack/fenders make it truly practical for commuting and hauling.
- Color display + app support add a modern, connected feel that many fat-tire bikes in this segment lack.
Cons
- At 82 lb, this is a heavy bike—unsuited to frequent stair-carrying or tight indoor storage.
- Out-of-the-box 30+ mph capability may exceed ebike class limits in some regions unless you adjust settings.
- Hardtail design means very rough off-road terrain can still feel harsh at the rear.
- High power and fat tires can chew through the battery quickly if you ride full-throttle at high speeds on hilly routes.
- Non-folding frame: you’ll need a larger SUV, van, or truck (or a hitch rack) if you plan to transport it by car.
Who the Jasion Thunder Is Best For
Thunder is a great fit if you:
- Want a full-size fat-tire ebike that feels closer to a light electric moto than a mild commuter.
- Plan to ride mixed terrain: pavement, dirt paths, gravel roads, snow, or beach sand.
- Have dedicated storage space for a big, heavy bike (garage, ground-floor apartment, shed, or RV setup).
- Appreciate integrated lights, turn signals, hydraulic brakes, and app support for higher-speed commuting or weekend exploring.
- Need a high payload rating for heavier riders or loaded cargo setups.
If your ideal ebike is something that can comfortably cruise at 25–30 mph, soak up rough surfaces, and carry serious weight without feeling overwhelmed, Thunder fits that mold.
Who Might Want a Different Bike
You might want to look elsewhere if:
- You live in a walk-up and need something much lighter or folding.
- You ride almost exclusively on smooth pavement and would prefer a lighter, more efficient 27.5″ or 700c city/commuter ebike.
- You want strict Class 1/2 compliance and never plan to ride above 20 mph.
- You’re looking for rear suspension for more technical off-road or downhill riding.
In those cases, a lighter city ebike or a dedicated full-suspension e-MTB might be a better match.
Final Thoughts: Is the Jasion Thunder a Good Fit?
The Jasion Thunder combines an 1800W peak hub motor, 48V 18Ah battery, 26″ x 4″ fat tires, dual hydraulic brakes, and a 400 lb payload rating into a single, aggressively capable all-terrain package. It’s not subtle, and it’s not small—but for the right rider, that’s exactly the appeal.
If you’re looking for a powerful, full-size fat-tire ebike that can:
- Hit 30+ mph when configured for it,
- Tackle trails, snow, sand, and city streets, and
- Carry you plus serious cargo without feeling underpowered,
Thunder absolutely belongs on your shortlist.
👉 For the latest specs, colors, and bundles, check the official Jasion Thunder page here.
