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Studio side view of Fastron ST step-through fat tire electric bike in sky blue
Rider posing with sky blue Fastron ST ebike on a dirt trail
Front angle studio shot of sky blue Fastron ST fat tire e-bike
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
Outdoor shot of rider climbing rough terrain on orange Fastron ST e-bike
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
Tan Fastron ST e-bike parked near palm trees on a sunlit urban pathway
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
TUV Safety Certified
Certified in accordance with UL 2849 / UL 2271
Studio side view of Fastron ST step-through fat tire electric bike in sky blue
Rider posing with sky blue Fastron ST ebike on a dirt trail
Front angle studio shot of sky blue Fastron ST fat tire e-bike
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
Outdoor shot of rider climbing rough terrain on orange Fastron ST e-bike
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
Tan Fastron ST e-bike parked near palm trees on a sunlit urban pathway
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

$2,199.00 $1,799.00
/

Easy to hop on, steady on any surface. The step-through frame, fat tires, and powerful motor handle bumps, sand, and hills without breaking a sweat.

  • Ship within 2-3 business days
Color
2-Year Warranty
14-Day Returns
Free Shipping
720 Wh
Battery
Up to 60 Miles
Range
750 W
Motor
28 MPH
Top Speed
8 Speed
Gearing
26*4.0 "
Tires
TUV Safety Certified
Certified in accordance with UL 2849 / UL 2271

Questions? Email us at info@leoguarbikes.com

Built for Safety, Comfort, and Off-Road Riding

electric mountain bikes for sale

Comfort and Style

Cruise in comfort with our ergonomic step-through frame, designed for easy mounting and smooth rides. Whether you're 5'3" or 6'5", the adjustable custom leather saddle with litchi texture ensures long-lasting support. Paired with a high-rise handlebar and optional fenders, it’s a sleek yet functional design made for commuting or exploring in style.

Smooth and Silent

Experience quiet power with the 750W rear hub motor and cadence sensor that delivers smooth, consistent acceleration. The whisper-quiet system reduces noise and vibration, perfect for city cruising or off-road trails. With 5 pedal assist levels and a half-twist throttle, you’ll glide effortlessly across any terrain—without breaking a sweat.
specialized electric mountain bike

Powerful Performance

Dominate hills and tough trails with 85Nm of torque and Shimano 8-speed gearing (12T–32T range). The 48V motor and 52T chainring combo give you confident climbing and steady cruising. Built to handle up to 300 lbs of total weight, it’s a powerhouse you can rely on for both speed and strength.

Unmatched Grip and Safety

Ride worry-free on rugged terrain thanks to Vee 26x4.0” fat tires and Tektro 180mm hydraulic disc brakes. These ultra-wide, puncture-resistant tires enhance stability, while the brakes deliver strong, precise stopping power in all conditions. Whether you’re on wet pavement or rocky trails, control and safety come standard.

Features

Secure Dual-Lock 48V Battery

Our 48V lithium battery is protected by a patented dual-lock system to prevent theft or accidental drops. A single key releases the pack for easy charging. Whether you're navigating city streets or venturing off-road, the battery stays locked in and worry-free.

Smart LCD Display with Security Features

Equipped with a 2.0" waterproof TFT screen, this smart console offers clear visibility in all lighting conditions. The built-in anti-theft password lock ensures your bike stays protected, while onboard diagnostics, pedal assist levels, and USB charging keep your rides safe, smooth, and connected—rain or shine.

750W Rear Hub Motor + Shimano 8-Speed

Powered by a robust 750W rear hub motor and a Shimano 8-speed gear system (12T–32T), this e-bike delivers reliable torque and smooth shifting. Whether climbing hills or cruising long stretches, the system ensures steady power, better control, and reduced leg fatigue.

Alloy Suspension Fork (3.15" Travel)

Our premium front suspension fork absorbs road shock and trail bumps with ease, improving comfort and handling. With 3.15 inches of travel, it helps reduce fatigue on longer rides and enhances control over rough or unpredictable surfaces.

5-Level Pedal Assist + Half-Twist Throttle

Customize your ride with five levels of pedal assist or use the half-twist throttle for effortless cruising. Reach speeds up to 28 MPH and enjoy up to 60 miles of range per charge—ideal for daily commuting or extended weekend rides. Whether you need a boost uphill or just want to coast, it adapts to your pace.

Hydraulic Disc Brakes (Tektro 180mm)

Equipped with Tektro 180mm hydraulic disc brakes, this e-bike ensures consistent, powerful stopping in all weather. Whether you're navigating traffic or descending a slope, these brakes provide smooth, responsive control with minimal hand effort.

Ergonomic Adjustable Comfort Saddle

The leather-padded saddle is ergonomically designed to support your hips and reduce pressure points. With height adjustability to suit riders of different sizes, it promotes proper posture and riding comfort—whether you're commuting daily or exploring new routes.

All-Terrain 26×4.0" Fat Tires

Built for versatility, our 26×4.0-inch puncture-resistant fat tires provide exceptional traction across sand, snow, gravel, and city streets. The wide contact surface improves stability and reduces vibration, making every ride smoother and more effortless, even on uneven or loose terrain.
General
Electronics
Components
General
  • 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
fat tire bikes for sale
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 -- Standover Height 43.31"
J -- Minimum Saddle Height 31.89"
K -- Maximum Saddle Height 39.37"
L -- Minimum Saddle to B.B height 21.26"
M -- Maximum Saddle to B.B height 28.74"

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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To unlock the top speed of your Fastron step thru e bike, which is set to a default of 20 MPH, follow these steps: Navigate to the settings page on the display → Enter the advanced settings → Input the password (please email us to obtain the password) → Change the C3 option from 'off' to 'on' → Save the settings and exit. This will activate the capability to reach up to 28 MPH.
Electric Bike Fat tires significantly improve traction and stability on a variety of terrains, offering a smoother, more comfortable ride. Their wide surface area enhances grip in both wet and dry conditions, reducing the impact of bumps and ensuring a safer, more controlled cycling experience across all terrain types.
The Fastron ST, a step through electric bike, features a low top tube frame for easier access and mounting. This design is especially beneficial for those with limited mobility or who prefer a more comfortable experience when mounting and dismounting.
The only difference between the Fastron ST and Fastron lightweight Step Over bicycle is the design of the top tube frame. Your choice depends on personal needs and cycling habits. If you're looking for easy mounting/dismounting and a comfortable ride, the Fastron ST’s step-thru frame design is for you. But if you crave speed, intense riding experiences, or need extra stability for challenging conditions, the Fastron’s step-over design is the better option.
The recommended rider height is 5'3" ~ 6'4", payload 350lbs at maximum.
To charge your Fastron ST’s battery, you have two options: Directly connect the charger to the charging port on the bike’s frame, or use the key to unlock the battery package, remove the battery, and charge it separately. A full charge typically takes only 4–5 hours.
For further information and solutions, please refer to our FAQs or email info@leoguarbikes.com.
Fastron ST Manual download Fastron ST Fat Tire Ebike

Customer Reviews

Based on 25 reviews
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T
Troy W

The swept-back handlebars and neatly spiral-wrapped cables dont just look stylishthey also feel durable and well-made. The cables are better protected, which means less wear and tear over time and the bike stays looking clean and well-kept.

User picture
T
Todd B

The 26" x 4" fat tires make a big differencethey absorb bumps well and offer great stability on all kinds of terrain. Whether I'm riding along the beach or through city streets, the bike feels solid, balanced, and super secure. It gives me a lot more confidence on uneven surfaces.

User picture
A
Anonymous

This is my second LEOGUAR bike. I got their folding ebike before and loved it, so I didnt hesitate to get this new one. Their bikes are consistently great, and Im really happy with this purchase too.

R
Randy S
Reliable Braking, Even on Hills and in Traffic

The hydraulic brakes are super responsivemuch better than the mechanical ones I had on my old bike. After over 50 miles of riding, including some downhill trails and a few stop-and-go city rides, theyre still performing like new. No squeaks, no fadejust smooth, reliable stopping power. It really gives me peace of mind, especially when riding at higher speeds or through busy intersections.

A
Ary S

The wiring on this bike is impressively clean and well-routedno messy cables hanging out like you see on some other e-bikes. It gives the whole bike a sleek, minimalist look that I really appreciate. Plus, having everything so organized makes any future maintenance or upgrades much easier.

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