The Trail-Ready Fat Tire Mountain Ebike
The AOSTIR – 750W Electric Mountain Bike S07 is a powerful fat tire ebike designed for riders who want to tackle diverse terrains with confidence. From mountain trails and gravel paths to snow, sand, and beach riding, this versatile machine delivers reliable performance wherever you roam.
Powerful 750W High-Speed Brushless Motor
At the heart of this model is a 750W brushless gear motor that provides strong, consistent power for climbing hills and navigating rough terrain. It reaches a top speed of 28 mph (45 km/h), making it fast enough for both off-road adventures and urban commuting.
48V 13Ah Removable Lithium Battery
The bike is equipped with a 48V 13Ah lithium-ion battery that delivers a range of 25-35 km (15-22 miles) in pure power mode and up to 50-70 km (30-45 miles) with pedal assist. The battery is easily removable for convenient charging at home or work, with a full recharge taking 4-6 hours.
26″ x 4.0″ Fat Tires for All-Terrain Traction
Massive 26″ x 4.0″ fat tires provide exceptional traction on sand, snow, gravel, mud, and rocky trails. This model floats over soft surfaces and absorbs bumps, giving you confidence on challenging terrain.
Front Suspension Fork for Comfort
The aluminum alloy suspension fork smooths out potholes, roots, and rocky sections of trail. Combined with the fat tires, this bike provides a comfortable ride that reduces fatigue on long off-road adventures.
Three Riding Modes for Versatility
This model offers three distinct riding modes to match your needs and conserve battery life:
- Pedal Mode – Traditional cycling for exercise
- Power Mode (PAS) – 5-level intelligent pedal-assist system
- Boost Mode (Throttle) – Half-twist throttle for pure electric power
Shimano 7-Speed Drivetrain
A Shimano 7-speed drivetrain with Sunrace derailleur gives you precise gear control for different terrains and inclines. You’ll find the perfect pedaling cadence whether climbing steep grades or cruising on flats.
Mechanical Disc Brakes for Reliable Stopping
Front and rear mechanical disc brakes with 180mm front and 160mm rear rotors provide reliable stopping power in all weather conditions. The bike includes 4 brake pads total, ensuring confident braking on steep descents.
SW-U-LCD Display with USB Charging
The SW-U-LCD display shows battery power, speed, mileage, gear, and wattage. A USB port under the display lets you charge your phone or GPS device on the go.
6061 Aluminum Alloy Frame with Rear Rack
The lightweight 6061 aluminum alloy frame provides durability without excessive weight. A rear rack for cargo and a front LED headlight for visibility in low-light conditions come standard.
Size and Fit
The frame fits riders from 5’7″ to 6’5″ in height with a maximum payload capacity of 300 lbs. Saddle height is adjustable from 88-100cm (34.6-39.4 inches). The bike weighs approximately 73 lbs (33 kg).
Assembly and Delivery
Assembly is 90% complete out of the box, with final assembly including the front wheel, handlebars, and pedals. Basic tools are included. A one-year warranty covers defects in materials and workmanship.
Who Is This Ebike For?
This powerful fat tire mountain bike is perfect for:
- Off-road enthusiasts exploring mountain and gravel trails
- Beach and snow riders needing fat tire capability
- Commuters wanting a powerful, rugged daily driver
- Riders 5’7″ to 6’5″ seeking a comfortable fit
- Anyone who wants a versatile, all-terrain ebike
To protect your battery investment, read our Ebike Battery Care Guide. For routine upkeep, follow our Essential Ebike Maintenance Tips.
Pros:
- 750W brushless motor (28 mph top speed)
- 48V 13Ah removable battery (4-6 hour charge)
- 26″ x 4.0″ fat tires for all-terrain
- Front suspension fork for comfort
- Shimano 7-speed drivetrain
- Mechanical disc brakes (180/160mm)
- Three riding modes with PAS
- SW-U-LCD display with USB charging
- Rear rack and front light included
- 300 lb payload capacity
- 90% pre-assembled
- One-year warranty
Cons:
- Heavy at 73 lbs (33 kg)
- Mechanical brakes (not hydraulic)
- Limited range in pure power mode (25-35 km)
- Rigid rear end (no rear suspension)
AOSTIR – 750W Electric Mountain Bike S07: Technical Specifications
- Motor: 750W brushless gear motor
- Battery: 48V 13Ah lithium-ion
- Controller: 48V 22A
- Top Speed: 28 mph (45 km/h)
- Range: 25-35 km pure power / 50-70 km PAS
- Charge Time: 4-6 hours
- Frame: 6061 aluminum alloy
- Fork: Aluminum alloy suspension fork (ZOOM)
- Brakes: F/R mechanical disc (180mm front / 160mm rear)
- Gears: 7-speed Shimano / Sunrace
- Tires: 26″ x 4.0″ fat tires
- Display: SW-U-LCD with USB port
- Throttle: Rotary half-twist
- Pedal Assist: 5-level PAS intelligent system
- Lights: Front LED headlight
- Rear Rack: Included
- Fenders: Included
- Weight: 73 lbs (33 kg)
- Payload Capacity: 300 lbs
- Rider Height: 5’7″ – 6’5″
- Colors: Black, White, Camouflage
- Certification: UL certified
Why Choose This 750W Fat Tire Mountain Ebike?
The AOSTIR S07 delivers impressive power and versatility at an accessible price point. The 750W motor provides ample torque for climbing hills and powering through soft terrain, while the 26″ x 4.0″ fat tires give you the confidence to explore surfaces that would stop standard mountain bikes.
The included rear rack and fenders add practical utility for commuting or carrying gear on camping trips. The SW-U-LCD display with USB charging keeps your devices powered on long rides. And the 90% pre-assembled delivery means you’ll be riding sooner with less setup hassle.
Customer reviews praise the bike’s speed, power, and attention-getting looks. Some users note that the front headset may require adjustment upon delivery, and battery performance decreases in very cold temperatures — a common limitation for all lithium-ion ebikes in winter conditions.
For riders seeking a powerful, fat tire electric mountain bike that handles diverse terrains without breaking the bank, this model is a compelling choice.
For more options, browse our Collection of Fat Tire Ebikes or read our Ebike Buying Guide to find your perfect match.
