Aostirmotor S18-MINI 500W Full-Suspension Fat Ebike w/ Twist Throttle

4 reviews

FREE Shipping to US Lower 48
DAILY Inventory Updates
NEED HELP? Call 888-883-3350

Full-Suspension Mountain Ebike

500W Rear Hub Motor

48V/15Ah Removable Lithium-Ion Battery w/ Samsung Cells


aostirmotor authorized dealer logo for really good ebikes


Aostirmotor S18-MINI Description

The Aostirmotor Ebikes S18-MINI is truly unique. It's a full-suspension mountain bike with 20" x 4" fat tires, perfect for any off-road adventure.

When I first tried the S18-MINI, I was blown away. I'm a big guy, so I was worried that this bike might be too small for me or might lack the kind of power I'm used to, but I was wrong on both counts. The 500W rear hub motor featured on the S18-MINI has tons of power and torque, and even on the roughest terrain, the full-suspension frame really absorbed the shocks.

Whenever I test a new ebike, the first thing I do is ride it like a conventional bike with the electronics turned off. I found the 7-speed Shimano Sunrace gears to shift smoothly, and the bike handled exceptionally well. 

But then I turned on the power and checked out the pedal assist system (PAS), which was remarkably responsive for an ebike with a cadence sensor. I also found the twist throttle to be easy to operate and fun to use.

S18-MINI Specifications

  • Motor: Truck Brand 500W Rear Hub Motor
  • Battery: 48V/15Ah Removable Samsung Lithium-Ion Battery
  • Controller: 48V/22A
  • Charger: 110-220V
  • Display: Aostirmotor SW-U-LCD Display
  • Drive Modes: 5-Level Pedal Assist System, Right Side Half-Twist Throttle & 7-Speed Shimano Sunrace Derailleur
  • Charge Time: 4-6 Hours
  • Frame: Full Suspension 6061 Aluminum Alloy Frame
  • Handlebar: 31.8mm x 660mm
  • Stem: 28.6mm x 31.8mm x 110mm
  • Brake: Tektro Mechanical Disc Brakes w/ 180mm Front & 160mm Rear Rotors (with 4pcs brake pads)
  • Tire: 20” x 4” Chaoyang Fat Tires Mounted on Aluminum Alloy Spoked Wheels
  • Front Suspension: Zoom/Mozo Spring Hydraulic Fork w/ Lockout
  • Rear Suspension: Rear Spring Shock
  • Range: 25-35 km (Pure Power Mode)
  • Saddle: AL6061 T4T6 City Type 27.2mm x 250mm Adjustable Saddle
  • Light: LED Front and Rear Brake Lights
  • Fender: Included
  • Max Speed: 25 mph (40km/h)
  • Minimum Seat Height: 31.4”
  • Maximum Seat Height: 36.2”
  • Handlebar Length: 26”
  • Standover Height: 31”
  • Product Size: 64” x 40”
  • Weight: 64 Lbs.
  • Weight Capacity: 300 Lbs.
  • Box Dimensions & Weight: 55” x 11” x 30” (74.9 Lbs.)
  • User Manual: 1
  • Assembly: The S18-MINI comes mostly assembled. Final assembly includes attachment of the pedals, handlebar, front wheel, seat, fender and light. 
  • Tools Required: 4mm, 5mm and 6mm hex (Allen) keys, and 8mm/10mm and 13mm/15mm wrenches (Included)
  • Shipping: Free shipping to the lower 48. For shipping to Canada, please send us your shipping address and the products you want, and we will find the best rate available. We cannot ship this brand to Alaska or Hawaii at this time.

Orders for in-stock items take 24-48 hours to process, then about 5-7 days in transit. Delays due to Covid have occurred. If an item is on backorder, the estimated ship date will be shown below the Pre-Order Button.

All products are shipped free within the Contiguous US via UPS, FedEx or similar carrier. Shipping to AK, HI and PR may incur additional charges.

If your package appears damaged from shipping, please do not accept it. Tell the driver to keep the package and contact us immediately at 888-883-3350. We offerGuide Package Protectionto ensure against lost, stolen or damaged goods. Click here to learn more about Guide.

Returns for buyer’s remorse are typically not accepted by our suppliers, and if accepted, the customer may incur shipping and restocking fees.

Please click here to read our entire Shipping & Returns Policy.


Have a Question?

Be the first to ask a question about this.

Ask a Question
Customer Reviews
5.0 Based on 4 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:

    Awesome bike!

    I love it! Can't wait to take it to Catalina! Thanks Again!

    William B.
    United States United States

    Really Good Ebikes

    You are most welcome. Thanks for the review.


    Awesome bike!

    This is one cool machine! Can't wait to try it out at the beach! Thanks to Really Good Ebikes and Kelsha for all of the help!!!

    William B.
    United States United States

    Really Good Ebikes

    Thanks William for the great review. It was our pleasure to assist.


    Perfect Fat Tire For Teens

    I got the S18-MINI for my 14 year old teen boy, and he loves it. He rides it everywhere, on and off road, school, everywhere. It's a smaller fat tire electric mountain bike, but I think he can ride it even as he matures in size. I ride it just fine.

    Mark H.
    Mexico Mexico

    Cool New Toy

    Great bike. It looks cool and has a powerful motor. I was a little worried about the size, but the bike fits perfectly. The adjustable seats allowed me to get that sweet spot for the most comfortable ride. I just love my new bike, can't wait for my upcoming bike trip.

    Glen S.
    Dominica Dominica

    Really Good Ebikes

    Have a great trip. Thanks for the review.