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.


  • 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)