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UL 2849 / UL 2271
Right-side view of Fastron SO ebike with suspension fork and green-accented fat tires
Two Fastron SO ebikes parked in front of modern city buildings, urban riding scene
City riding shot of Fastron SO electric bikes parked near skyscrapers
fat tire electric bike tested for comfort
Studio side view of Fastron SO fat tire electric bike with green rims and step-over frame
Close-up of rider pedaling Fastron SO e-bike with fat tires and rugged motor hub
Front-angle studio shot of Fastron SO electric mountain bike with fat tires
Side-by-side studio view of two Fastron SO fat tire ebikes with step-over frames
Fastron SO ebike pair in outdoor setting, showing battery and wide tire details
Green-rimmed Fastron SO fat tire ebike with upright geometry, angled view
Front-left studio angle of Fastron SO ebike showing treaded fat tires
Tan version of Fastron SO fat tire electric bike parked on urban walkway
Urban photo of two Fastron SO ebikes parked in plaza, showcasing motor and rear rack
Studio side-by-side view of black and tan Fastron SO electric bikes with fat tires
720 Wh
Battery
Up to 60 Miles
Range
750 W
Motor
28 MPH
Top Speed
8 Speed
Gearing
26*4.0 "
Tires
Cadence Sensor
Sensor
Canbus
System
Right-side view of Fastron SO ebike with suspension fork and green-accented fat tires
Two Fastron SO ebikes parked in front of modern city buildings, urban riding scene
City riding shot of Fastron SO electric bikes parked near skyscrapers
fat tire electric bike tested for comfort
Studio side view of Fastron SO fat tire electric bike with green rims and step-over frame
Close-up of rider pedaling Fastron SO e-bike with fat tires and rugged motor hub
Front-angle studio shot of Fastron SO electric mountain bike with fat tires
Side-by-side studio view of two Fastron SO fat tire ebikes with step-over frames
Fastron SO ebike pair in outdoor setting, showing battery and wide tire details
Green-rimmed Fastron SO fat tire ebike with upright geometry, angled view
Front-left studio angle of Fastron SO ebike showing treaded fat tires
Tan version of Fastron SO fat tire electric bike parked on urban walkway
Urban photo of two Fastron SO ebikes parked in plaza, showcasing motor and rear rack
Studio side-by-side view of black and tan Fastron SO electric bikes with fat tires

Fastron SO Fat Tire Ebike

Step-over strength, fat-tire grip, built for all terrain.

$1,899.00 $1,489.00
/
  • Ship within 2-3 business days

Delivery Time: Most orders arrive in 2-7 business days. Delivery may take longer due to weather, remote locations, or carrier delays.

Free Shipping to US except Alaska, Hawaii, Puerto Rico & other US territories.

14-Day Trial: Return it if you’re not 100% satisfied. Restocking fee applies.

2-Year Limited Warranty: Covers all electrical components for 2 years. See details here.

Color

Gear Up Your Ride

Package Included

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Electric Bike
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Charger
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Pedals
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Manual
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Toolkit
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Built for Safety, Comfort, and Off-Road Riding

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Everyday Power for Pavement and Trails

The Fastron SO fat tire ebike uses a 750W rated rear hub motor that can reach 1,000W peak output, with 85Nm of torque for starts and climbs. Choose from five pedal-assist levels or use the half-twist throttle. Its 720Wh battery is advertised for up to 60 miles with pedal assist; hills, speed, assist level, rider and cargo weight, temperature, wind, and tire pressure all affect real-world range.
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Grip and Cushioning for Mixed Terrain

The 26 × 4.0-inch tires give the bike a broad contact patch for loose gravel, packed trails, sand, snow, and rough pavement. An oil-suspension fork with 3.14 inches of travel helps absorb bumps, while Tektro hydraulic disc brakes support controlled stops. Traction and braking still depend on tire pressure, surface conditions, speed, and rider technique.
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A Step-Over Fit for Everyday Exploring

The 6061 aluminum step-over frame supports up to 300 lbs total, including the rider and cargo, and is recommended for riders 5'3" to 6'5". Adjust the saddle and check the geometry chart before riding to find a comfortable position. The bike weighs 70 lbs with the battery, so plan how you will lift, store, or transport it.
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Ride Information in Clear View

The color display shows speed, battery level, and your selected assist level. Five assist settings let you choose how much motor support you want, and the display includes a USB-C port for device charging. The CANbus system supports communication among the bike's electronic components.

Features

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Removable 48V 15Ah Battery

The 720Wh battery uses a lock and retaining mechanism to help keep it secured to the frame while you ride. Use the key to release and remove the pack when you prefer to charge indoors, or charge it on the bike. A full charge takes about five hours, depending on the starting charge level.
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Color Display with USB-C Charging

Check your speed, battery level, and pedal-assist setting on the 2.0-inch color display. Its controls provide access to five assist levels and bike settings, while the USB-C port can charge a compatible device. The CANbus connection supports communication among the bike's electronic components.
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750W Rated Motor with 1,000W Peak Power

The rear hub motor is rated at 750W and can reach 1,000W peak output. The 750W figure is its rated power, while 1,000W describes shorter bursts of peak output from the same motor. Its 85Nm of torque helps with starts and climbs, while the Shimano 8-speed drivetrain lets you adjust your pedaling cadence as terrain changes.
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Lockout Suspension Fork with 3.14-Inch Travel

The alloy oil-suspension fork offers 3.14 inches of travel to help soften bumps on rough pavement and packed trails. Use the lockout when you want a firmer fork on smoother surfaces. Slow down and choose your line carefully on loose or uneven ground.
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Five Assist Levels, Throttle, and Two Speed Settings

The Fastron SO ships configured for a 20 mph top speed and can be unlocked through the display settings to reach up to 28 mph where permitted. Choose from five pedal-assist levels or use the half-twist throttle. The advertised range is up to 60 miles with pedal assist; throttle use, higher speeds, hills, rider and cargo weight, wind, temperature, and tire pressure can shorten a ride.
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Tektro Hydraulic Disc Brakes

Tektro hydraulic disc brakes with 180mm rotors provide progressive braking control for everyday streets and mixed-terrain rides. The brake levers include motor cut-off sensors, which stop motor assistance when you brake. Leave more stopping distance on wet, loose, or steep surfaces.
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Adjustable Padded Saddle

The padded saddle can be raised or lowered to suit your leg length and pedaling position. Pair the saddle adjustment with the handlebar reach and the geometry chart to judge fit before longer rides. Comfort is personal, so make small adjustments and test them on a short ride.
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26 × 4.0-Inch Fat Tires

The 26 × 4.0-inch Vee tires add grip and cushioning on rough pavement, gravel, packed trails, sand, and snow. Their performance changes with tire pressure, tread condition, surface depth, and riding speed, so choose pressure for the surface and stay within the tire manufacturer's limits. Wide tires can also add weight and rolling resistance on pavement.
General
Electronics
Components
Geometry
  • Frame 6061 Aluminum Alloy
  • Rear Basket Load Capacity 55lbs, Optional, a separate purchase needed
  • Rider Height 5'3" - 6'5"
  • Frame Style Trail or off road
  • Speed 20 MPH, Unlockable to 28 MPH
  • Range Up to 60 Miles
  • Type Trail, Off-Road
  • Brake Levers Tektro Brake Lever with Power Cut-Off Sensor
  • Bell Included
  • Rotors 180mm Rotor
  • Kickstand Alloy Rigid Side Kickstand
  • Bike Weight 70lbs including the battery weight
  • Total Weight Limit 300 lbs
  • Ideal Use Trail or off road
  • Pedal Assist 5 Levels
  • Charger 54.6V DC, 3A smart charger, operates on 100V-240V AC power outlets
  • USB Port One USB-C port, located on display
  • Headlight 48V LED with quick disconnect
  • Motor Hub 48V 750W 85Nm
  • Battery 48V15Ah (720Wh) Canbus Protocol, Certified by UL 2271
  • Sensor Cadence Sensor
  • Cell LG 21700 5000mah cells
  • Charging Time About 5 Hours
  • Display Color Display and 5 Speed Levels, Canbus Protocol
  • Throttle Assist Half Twist Throttle
  • Tail Light LED with brake light
  • Chainrings 52T Alloy Forged
  • Crankset Alloy Forged 6.89"
  • Rear Derailleur Shimano RD-M360/acera
  • Brakes Tektro Hydraulic Disc Brakes
  • Rims 26'' * 3.15" 36h, Alloy Double Wall
  • Tires Vee 26''*4.0, 72TPI
  • Spokes Stainless Steel, 13G Front / 12G Rear
  • Handlebars Aluminum Alloy, D:1.25" W:29.53"
  • Stem Black 3D Forged, 3.15" Length, 7° Rise, 1.25" Handlebar Clamp
  • Saddle Custom made comfy Leather Seat (Litchi Texture)
  • Seatpost 1.21" 13.78" length, forged and rigid
  • Fenders Metal, Optional, a separate purchase needed
  • Pedals Wellgo Brand, Double Bearing and Forged
  • Rear rack Black Aluminum Alloy, Optional, a separate purchase needed
  • Cassette Shimano CS-HG20-8/12-32T/8sp cassette
  • Front Fork Alloy threadless and oil suspension with lockout, 3.14" travel
  • Shift lever 8sp Trigger Lever
  • Chain 128 links, 8sp, KMC Rust-proof
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A -- Head Tube Length 5.91"
B -- Top Tube Length 24.41"
C -- Seat Tube Length 17.52"
D -- Stack Height 26.06"
E -- Reach 16.46"
F -- Chainstay Length 20.47"
G -- Wheelbase 49.21"
H -- Wheel Diameter 29.53"
I -- Handlebar Height 43.31"
J -- Minimum Saddle Height 33.07"
K -- Maximum Saddle Height 40.55"
L -- Standover Height 26.65"

Real-world Range Testing

Full Throttle: works from level 1 to 6.
Normal
Max. Spd:  
20
 MPH
Range:  
26.65
 Miles
Pedal Assist: works from level 1 to 5.
Level1
Max. Spd:  
8
 MPH
Range: 
66.52
 Miles
Level2
Max. Spd:  
11
 MPH
Range: 
61.82
 Miles
Level3
Max. Spd:  
14
 MPH
Range: 
49.92
 Miles
Level4
Max. Spd:  
17
 MPH
Range: 
39.75
 Miles
Level5
Max. Spd:  
20
 MPH
Range: 
29.35
 Miles
Be aware that the cruising range may differ based on the riding conditions.

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LEOGUAR Fastron SO EBIKE REVIEW

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The Fastron SO arrives set to 20 mph. To enable the setting for speeds up to 28 mph, open the display's advanced settings, enter the password provided by Leoguar support, switch C3 from Off to On, save, and exit. Follow local e-bike rules and use the higher setting only where it is permitted.
Four-inch tires create a wider contact patch that can improve grip and cushioning on gravel, packed trails, sand, snow, and rough pavement. Tire pressure, tread condition, surface depth, speed, and rider technique still affect traction and stopping, so adjust your pace to the conditions.
The main difference is the frame shape. The Fastron SO has a higher step-over top tube, while the Fastron ST uses a lower step-through frame that can be easier to mount and dismount. Compare both geometry charts and choose the frame that fits your body, mobility, and riding preferences.
The recommended rider height is 5'3" to 6'5", and the total weight limit is 300 lbs, including the rider and any cargo. Compare your measurements with the geometry chart, especially the 26.65-inch standover height and 33.07-40.55-inch saddle-height range.
Visit Leoguar's FAQ page for general help, or email info@leoguarbikes.com with your order or product question. Include the bike model and a clear description so our support team can help more quickly.
A step-over ebike has a higher top tube that you step over when getting on and off. The Fastron SO uses this traditional frame shape; check its 26.65-inch standover height and the full geometry chart to make sure you can mount and stand over it comfortably.
Connect the supplied charger to the battery while it is installed, or unlock and remove the battery to charge it indoors. A full charge takes about five hours, depending on how much charge remains. Charge in a dry, ventilated area and follow the instructions in the owner's manual.
Fastron SO Manual download Fastron SO Fat Tire Ebike

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