Aostirmotor S18 750W Full-Suspension Electric Mountain Bike

5 reviews

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Apple Green

Full-Suspension Mountain Ebike

Powerful 750W Rear Hub Motor

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


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Aostirmotor S18 Description

The Aostirmotor S18 is a fun and affordable electric mountain bike. It features a powerful 750W rear hub motor, paired with a mid-range 48V/15Ah removable battery with Samsung cells.

This powerhouse is controlled by the 5-level Pedal Assist System (PAS) and a right-side half-twist throttle, giving you great control over your riding experience. 

The full-suspension frame absorbs the impact from uneven surfaces, especially if you go off-road on heavily rutted trails. During my test ride, I was very impressed with the performance of the suspension system, as well as the bicycle handling and electronics. 

If you are looking for a high-performance fat tire, full-suspension electric mountain bike for under two grand, the S18 should definitely be on your shortlist. 

Please take a look at what Micah Toll has to say in his review of this full-suspension fat tire electric mountain bike.

S18 Ebike Specifications

  • Motor: Truckrun Brand 750W Rear Hub Motor
  • Battery: 48V/15Ah Removable Lithium-Ion Battery w/ Samsung Cells
  • 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
  • Tire: 26” x 4” Fat Tires Mounted on Aluminum Alloy Spoked Wheels
  • Front Suspension: Zoom Hydraulic Fork w/ Lockout
  • Rear Suspension: Rear Spring Shock, L = 125mm, w/ 20mm of Stroke
  • Saddle: City Type 27.2mm x 250mm
  • Light: Front and Rear
  • Fender: Included
  • Rear Rack: Included
  • Max Speed: 28 mph
  • Weight: 77 Lbs.
  • Product Size: 73” x 44”
  • Box Dimensions & Weight: 64” x 11” x 32” (88 Lbs.)
  • Minimum Seat Height: 34”
  • Maximum Seat Height: 39”
  • Handlebar Length: 26”
  • Standover Height: 33”
  • Weight Capacity: 300 Lbs
  • Assembly: The S18 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.

Here Steve from Aostirmotor goes over the awesome specs of the S18. 

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.


Ask a Question
  • what is the length of the rear shock?

    The length of the rear shock is 125mm, with 20mm of stroke.

  • What is the brand name of the front & rear shocks?

    The S18 comes with a Zoom hydraulic fork with lockout and a rear spring shock L=125mm, with 20mm of stroke

  • What is the brand name of the hydraulic brakes?

    The S18 comes with Tektro mechanical disc brakes with 180mm front rotors and 160mm rear rotors

  • Is the lcd display in color? And if not do you offer an upgrade?

    No, the LCD display on the S18 does not come in color and there is no upgrade available for this model. The S18-1500W however does come with a colored LCD display.

Customer Reviews
5.0 Based on 5 Reviews
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    Exceptional Performance

    I love it. The 750-watt motor has plenty of power. If like me you live in a hilly area, this bike is a very good choice. You'll soon get the hang of which gears to choose under various hilly conditions for easy enjoyable riding. I am impressed by the construction of the bike and its performance has been exceptional.

    A Really Good Ebikes Customer
    Arthur B.
    Dominica Dominica

    Really Good Ebikes

    Thank you for the review.


    Aostirmotor s18

    It’s a great bike at that price point.

    Gregory D.
    United States United States

    Excellent Ebike for the Price

    I needed a powerful full-suspension mountain bike for myself. My husband got the S18-1500, but honestly this 750 is perfect for my lighter frame. It's very responsive and I like the unique frame design. Great customer service as well, so thanks for that.

    Sarah M.
    Mexico Mexico

    Really Good Ebikes

    You are most welcome. They really are great bikes. glad that you are happy and enjoying them. Thanks for the awesome review.


    Awesome Choice

    We purchased our new S18 mainly to take out with our RV, but it has turned out to be our all-purpose bike. We use this bike every day, it is truly loved by the entire family.

    Javid G.
    Dominica Dominica

    Really Good Ebikes

    Thanks for the review.


    Love This Powerful Ebike

    I am immensely enjoying my new ebike and the freedom it offers. This bike has lots of power, if you need it, and solid construction. I am completely satisfied with the value for the dollar and I'm enjoying getting to experience various travel goals.

    Kenson W.
    Dominica Dominica