isinwheel

isinwheel U8 Ultra Electric Bike for Adults - 1500W Fat Tire Ebike

Regular price $899.99 USD
Color: Black

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isinwheel U8 Ultra Electric Bike specification callout graphic
$899.99 USD
Black
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isinwheel U8 Ultra Electric Bike for Adults


Description

The isinwheel U8 Ultra is the top-tier model in the U8 Series - engineered for riders who demand maximum power, extended range, and the confidence to tackle any terrain. Powered by a 1500W peak motor and a high-capacity 48V 18Ah (864Wh) battery, this Class 3 eBike delivers up to 105 miles of range and a top speed of 28 MPH, making it equally capable on daily commutes and weekend adventures. The 26x4.0" fat tires provide exceptional grip and natural shock absorption across city streets, gravel paths, sand, and snow.

Designed with comfort and control in mind, the U8 Ultra features hydraulic disc brakes for smooth and reliable stopping power, dual-action swingarm suspension to absorb road vibrations, and an ergonomic wide-cushion saddle to reduce fatigue on longer rides. Shimano 7-speed gearing, a clear LCD display, a ready-to-load rear rack, and an IP65 water-resistant rating round out a feature set that punches well above its class.


Key Features

  • 1500W Peak Motor: Delivers strong acceleration for hills, rough roads, and all-terrain riding - the most powerful engine in the U8 lineup.
  • 105-Mile Max Range: The 48V 18Ah (864Wh) battery provides exceptional endurance for long commutes and multi-day adventures.
  • 26x4.0" Fat Tires: Oversized fat tires improve grip, stability, and natural shock absorption on road, gravel, sand, and snow.
  • Hydraulic Disc Brakes: Deliver stronger stopping power and a smoother braking feel compared to mechanical disc brakes, with less rider effort required.
  • Shimano 7-Speed Gears: Industry-trusted shifting system for smooth, reliable gear changes across changing terrain and inclines.
  • BMS 2.0 Battery Management System: Advanced battery management protects every charge cycle, extending battery life by up to 30% compared to previous systems.
  • IP65 Water-Resistant Rating: Key electrical components are shielded from rain, splashes, and everyday moisture for all-weather riding confidence.
  • Dual-Action Swingarm Suspension: Front swingarm and internal spring work together to absorb bumps, cracks, and road vibrations before they reach the rider.
  • Removable Battery with USB Charging Port: Charge on or off the bike for flexibility and security; built-in USB port lets you power your phone on the go.
  • Class 3 eBike with 5-Level Pedal Assist + Throttle: Choose between full-electric throttle, 5 levels of pedal assist, or manual pedaling - your ride, your way.
  • Ready-to-Load Rear Rack + LCD Display: Carry daily essentials with ease, and monitor speed, battery, and assist level at a glance with the integrated display.
  • 1-Year Warranty with US-Based Support: Backed by the isinwheel Limited Warranty and a domestic support team for peace of mind after purchase.

Shipping

Ships free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.


What's Included

  • isinwheel U8 Ultra Electric Bike
  • 48V 18Ah Lithium Battery
  • Charger (100-240V / 3A)
  • LCD Display
  • Rear Rack
  • LED Headlight

Why You'll Love It

The U8 Ultra stands out in a crowded eBike market by delivering true all-terrain capability at an accessible price point - without cutting corners on the components that matter most. Riders who've made the switch consistently highlight the bike's surprising range, solid build quality, and the confidence that comes from hydraulic brakes and fat tires working together on unpredictable surfaces. The aluminum alloy frame keeps the bike durable yet manageable, and the adjustable seat makes it easy for riders of different heights to dial in the perfect fit. Whether you're a daily commuter looking to cut your fuel costs or an adventure rider who wants to explore beyond the pavement, the U8 Ultra is engineered to keep up with you. Backed by isinwheel's US-based customer support and a 1-year warranty, this is a bike you can depend on ride after ride.


Product Specifications

View Product Specs
Motor 1500W Peak Power
Battery 48V 18Ah / 864Wh Lithium
Max Range 105 Miles
Top Speed 28 MPH
Wheel Size 26 x 4.0 inches (Fat Tire)
Gears Shimano 7-Speed
Brakes Hydraulic Disc Brakes
Suspension Dual-Action Swingarm (Front)
Water Resistance IP65
Charge Voltage 100-240V / 3A
Charge Time 7-8 Hours
Net Weight 81.5 lbs
Max Load Capacity 330 lbs / 150 kg
Product Dimensions 78.0 x 28.7 x 46.9 in (198 x 73 x 119 cm)
Operating Temperature -4F to 140F
eBike Class Class 3 (up to 28 MPH with pedal assist)
Pedal Assist Levels 5 Levels + Throttle
Recommended Rider Height 5'9" - 6'6"
Warranty 1-Year Limited Warranty (US-Based Support)

FAQ

How does the U8 Ultra compare to the other U8 Series models?

The U8 Ultra is the top-tier model in the lineup. The U8 and U8 Pro use 20x3" tires and a 1000W peak motor - great for city commuting. The U8 Plus steps up to 26x4" fat tires and a 1500W motor with 75 miles of range. The U8 Ultra combines the same 1500W motor and fat tires with the largest battery in the series, delivering up to 105 miles of range. It's the best choice for riders who want maximum power and endurance.

Is the U8 Ultra considered a Class 3 eBike? Are there any restrictions?

Yes, the U8 Ultra is a Class 3 eBike, meaning it can reach up to 28 MPH with pedal assist. Class 3 eBikes are regulated differently by state and municipality - some areas restrict them from bike paths or require helmets. We recommend checking your local laws before riding. The throttle-only mode may also be subject to additional local restrictions.

Can I ride the U8 Ultra in the rain?

Yes - the U8 Ultra carries an IP65 water-resistance rating, which means it's protected against rain and splashes. You can confidently ride in light to moderate rain. However, avoid submerging the bike or riding through deep puddles, and make sure the battery charging port is properly sealed before heading out in wet conditions.

Is the battery removable, and how long does it take to charge?

Yes, the 48V 18Ah lithium battery is fully removable, so you can charge it on the bike or take it inside for convenience and security. A full charge takes approximately 7-8 hours using the included 3A charger. The bike also includes a USB charging port on the battery so you can charge your phone while you ride.

What is the weight limit and recommended rider height for the U8 Ultra?

The U8 Ultra supports a maximum load of 330 lbs (150 kg) and is best suited for riders between 5'9" and 6'6". The seat height is adjustable, so riders can fine-tune their fit for optimal comfort on both short commutes and longer rides.

Does the U8 Ultra require assembly?

The U8 Ultra ships partially assembled and requires some basic assembly before your first ride - typically attaching the handlebars, front wheel, pedals, and seat. Most riders complete assembly in 30-60 minutes using standard tools. If you have questions during setup, isinwheel's US-based support team is available to help.

How is the U8 Ultra shipped, and how long does delivery take?

The U8 Ultra ships free to the contiguous United States via UPS or FedEx. It is shipped in a box and does not require freight or pallet delivery. Delivery times vary - please email us at service@omahasportsandgames.com for a current ETA after placing your order.


Product specifications table
Specification name Specification Value
Age group Adults
Battery size Unknown
Battery type Rechargeable, Contained-detachable
Bicycle features Built-in front light, LED control panel
Color pattern Black
Gearing type Chain
Material Aluminum

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