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Leoguar Ebikes
UL 2849 / UL 2271
Fastron ST fat tire ebike in Baby Blue, side view
Fastron ST fat tire e-bike in sky blue with rider posing outdoors
Front angle studio shot of sky blue Fastron ST fat tire e-bike
fat tire electric bike tested for comfort
Right-side studio view of sky blue Fastron ST e-bike with low-step frame and fat tires
Studio side view of orange Fastron ST fat tire e-bike with cargo rack and comfort saddle
Angled studio view of orange Fastron ST fat tire ebike with step-through frame
Studio side view of orange Leoguar ST fat tire electric bike with step-through frame and rear rack
Angled studio view of orange Leoguar step-through fat tire electric bike with rear hub motor and front suspension fork
Studio shot of tan Fastron ST step-through electric fat bike with swept-back handlebars
Angled studio view of tan Leoguar step-through fat tire electric bike with suspension fork and rear motor
Rear-side studio view of tan Fastron ST electric bike with wide 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
Fastron ST fat tire ebike in Baby Blue, side view
Fastron ST fat tire e-bike in sky blue with rider posing outdoors
Front angle studio shot of sky blue Fastron ST fat tire e-bike
fat tire electric bike tested for comfort
Right-side studio view of sky blue Fastron ST e-bike with low-step frame and fat tires
Studio side view of orange Fastron ST fat tire e-bike with cargo rack and comfort saddle
Angled studio view of orange Fastron ST fat tire ebike with step-through frame
Studio side view of orange Leoguar ST fat tire electric bike with step-through frame and rear rack
Angled studio view of orange Leoguar step-through fat tire electric bike with rear hub motor and front suspension fork
Studio shot of tan Fastron ST step-through electric fat bike with swept-back handlebars
Angled studio view of tan Leoguar step-through fat tire electric bike with suspension fork and rear motor
Rear-side studio view of tan Fastron ST electric bike with wide tires

Fastron ST Fat Tire Ebike

Easy to get on, stable to ride, ready 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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Easy Step-Through Comfort

The Fastron ST step-through fat tire electric bike uses a low-step frame that makes it easier to get on and off, especially when your ride includes frequent stops. The adjustable saddle and high-rise handlebar support an upright position for riders from 5'3" to 6'5". Metal fenders are available separately if you want more coverage in wet or muddy conditions.
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Pedal and Throttle Assistance

The cadence sensor brings in motor assistance as you pedal, while five assist levels let you choose how much help you want. Use the half-twist throttle for starts or short breaks from pedaling. Both controls make it easy to adjust motor support as traffic, grade, or surface conditions change.
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750W Rated Power for Everyday Hills

The rear hub motor is rated at 750W, reaches 1,000W at peak output, and produces up to 85Nm of torque. Pair the motor assistance with the Shimano 8-speed drivetrain and 12–32T cassette to find a comfortable cadence as the road changes. The bike's total payload limit is 300 lbs, including the rider and cargo.
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Wide Tires and Controlled Braking

Vee 26 × 4.0-inch fat tires give the bike a broad contact patch for added stability on pavement, gravel, hardpack, and other firm surfaces. Tektro hydraulic disc brakes with 180mm rotors provide controlled stopping. Slow down and leave extra braking room on wet, loose, icy, or uneven ground.

Features

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720Wh Removable Battery

The 48V 15Ah battery stores 720Wh, is certified to UL 2271, and uses a lock and retaining mechanism to help keep it secured to the frame while you ride. Use the key to remove it for indoor charging, or charge it while it remains on the bike. A full charge takes about five hours, depending on the battery's starting level.
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Color Display with USB-C Charging

The 2.0-inch TFT color display shows your speed, battery level, and selected assist level. It also provides system alerts, access to bike settings, and a USB-C port for charging a compatible device. The CANbus system 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

Choose from five pedal-assist levels or use the half-twist throttle when you want motor power without pedaling. The Fastron ST ships with a 20 mph default limit and can be unlocked to reach up to 28 mph where local rules allow. The advertised range is up to 60 miles with pedal assist; speed, assist level, throttle use, hills, rider and cargo weight, tire pressure, temperature, wind, and surface conditions all affect actual range.
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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 power cut-off sensors that stop motor assistance when you brake. Apply both brakes smoothly and 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 stability and help soften small bumps on pavement, gravel, hardpack, and compacted trails. Their grip still depends on pressure, surface, weather, and riding technique. Reduce speed on loose, wet, snowy, or icy ground, and choose routes that match your experience.
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 16.14"
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 31.89"
K -- Maximum Saddle Height 39.37"
L -- Standover Height 21.32"

Real-world Range Testing

Throttle-only test at the default 20 mph setting.
Normal
Max. Spd:  
20
 MPH
Range:  
26.65
 Miles
Pedal-assist tests at levels 1 through 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
These test results are examples, not guaranteed range. Actual distance varies with rider and cargo weight, speed, assist level, throttle use, hills, tire pressure, surface conditions, temperature, and wind.

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The Fastron ST 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. Email info@leoguarbikes.com for the password or setup help.
Their wide contact patch adds stability and can improve traction on pavement, gravel, hardpack, and compacted trails. They can also soften small bumps, but they do not make every surface equally safe. Tire pressure, weather, loose ground, snow, and ice all affect grip, so slow down and ride for the conditions.
Its low top tube lets you step through the frame instead of swinging a leg high over the saddle. That can make getting on and off easier during commutes, errands, and rides with frequent stops. Check the geometry chart and recommended 5'3" to 6'5" rider-height range to judge your fit.
Choose the ST if you prefer a lower step-through frame for easier mounting and dismounting. The SO uses a step-over frame with a higher top tube. Fit, comfort, and how often you stop matter more than assumptions about speed or riding ability, so compare both geometry charts before ordering.
The recommended rider-height range is 5'3" to 6'5". The maximum total payload is 300 lbs, including the rider and any cargo or accessories carried on the bike. The bike weighs 70 lbs with its battery, so plan for lifting, storage, and transport. Check the geometry chart and keep the combined load within the 300 lb limit.
You can charge the battery while it is locked to the bike, or remove it with the key and charge it indoors. Use the supplied charger and allow about five hours for a full charge; the time varies with the battery's starting level. Charge in a dry, ventilated area and follow the owner's manual.
Visit our e-bike FAQs for general setup and ownership questions, or email info@leoguarbikes.com for Fastron ST support.
Fastron ST Manual download Fastron ST Fat Tire Ebike

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