Aostirmotor S18 All-Terrain Electric Mountain Bike

Aostirmotor Bikes

Regular price
Price: $1,199.00
Regular price
List Price: $1,702.99
Sale price
Price: $1,199.00
You save: $503.99 (30%)
Shipping calculated at checkout.
Additional 5% off $100 or more and Free Shipping | Coupon Code: RIDE NOW | Ends:
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Order Confirmation:
As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail or text message.  If your item(s) are available, we will process the charges and submit the order for shipment.

Order Shipment:
If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

Shipping Times:
Shipping to the lower 48 usually takes between 3 to 5 business days but you should allow 3 to 10 business days depending on carrier used and delivery location.

Price Match Guarantee

Price Match Guarantee

We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price than us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

Our 100% Price Guarantee has some limitations:

  • You must purchase the item from our website before requesting your Price Match Guarantee
  • Promotions such as rebates and buy one, get one free offers are not eligible
  • The item must be in stock on the competitors website
  • The competitor must be an online store, they may not have a retail location
  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
  • The competitor must be an Authorized Retailer of the product in question
  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax


S18 All-Terrain Electric Mountain Bike By Aostirmotor Bikes


What sets the Aostirmotor S18 aside from any other fat tire electric mountain bike? Ride the trails with the Aostirmotor S18 All-Terrain Electric Mountain Bike. The S18 offers superior handling with its powerful motor and superior frame. Its adjustable shock absorber provides an effortless, comfortable ride on any terrain. Take your riding to the next level with the S18!

Sporting a sleek, matte black frame, the designers of the S18 crafted it with fashion, practicality, and sturdiness in mind. Thanks to its suspension front forks and chunky 4-inch tire, riders can confidently take on any terrain: from winding mountain roads to rocky paths. The S18's robust 6061 alloy frame can bear up to 300 lbs.


Triangular Sporty Frame The unique triangular frame increases the payload capacity of the bike up to 300 lbs. The grey frame and black linear decals give the bike more sporty. Its geometry offers superior stability, allowing you to climb up steep mountains and navigate off-road trails with ease.

750W Toothless Brush Motor S18 is coupled with a 750W toothless brush motor with a torque of 85Nm. The high-speed motor allows you to handle rough roads with ease. It's the perfect bike for tackling difficult terrain, with its power allowing you to reach speeds of up to 28 mph. You'll enjoy a safe ride experience with reliable mechanical performance.

48V 15Ah Lithium Battery
48V 15Ah (720Wh) removable & upgradable lithium battery. The battery charging problem can be easily solved by choosing a removable battery frame. With an easier charging process, you can enjoy extended rides and more spontaneous trips with an upgraded battery.


  • Total Length 73"
  • Handlebar Height 44"
  • Wheelbase 50"
  • Minimum Seat Height 31"
  • Maximum Seat Height 35"
  • Chain Stay Length 23"
  • Standover Height 33"
  • Top Tube Length 20"
  • Wheel Diameter 28"
  • Head Tube Length 6"
  • Handlebar Length 26"


Velofix is the perfect solution to ride more and save time.

With in-home assembly and repair from Velofix, you'll never have to spend your days in a bike store again. Velofix will assemble or repair your ride from the comfort of your home.


  • White glove assembly
  • Repairs
  • Maintenance

Please visit Velofix to schedule your in-home assembly.

4 Great reasons to buy from us:

  • Image of 4 topreasons Free shipping store wide
  • Image of 4 topreasons Top Tier Customer Service
  • Image of 4 topreasons UL 2849 Certification
  • Image of 4 topreasons Our Store Uses Secure Checkout Methods

Customer Reviews

Based on 2 reviews
Amir Lincoln

Great Bike ive had it for 3 years

Donald Hurd

This was an expensive purchase for us. Our recent move to the mountains means more outdoor activity and fun. While bike friendly, we are unable to go up long stretches of incline without some assistance.