X-Treme Rocky Road Fat Tire Electric Mountain Bike

  • $1,799.00
  • Save $700

• Range: Up To 70 Miles Range Using Low PAS & Flat Terrain While Pedal Assisting
• Top Speed: 25 MPH* On Throttle Only (Much Faster If You Pedal Assist 45+ MPH)
• Assistance: Thumb Throttle, Smart Pedal Assist, Pedal Power
• Weight: 67 lbs
• Warranty: 1 year X-treme Warranty & 1 year Battery Warranty

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X-Treme Rocky Road Fat Tire Electric Mountain Bike


This is the top-of-the-line Rocky Road Fat Tire Electric Mountain Bike by X-Treme. You can use it as a very reliable and comfortable daily ride, but its real purpose is traversing mountains and unpaved terrain. You will easily climb mountain trails, no matter how steep, with its fat tires, powerful motor, 9-speed gearing, and light aluminum frame. It is so powerful and capable it puts other bikes into shame.


  • BEASTLY 500-WATT MOTOR. Climbing up mountain trails can be a pain, so that’s why this bike has a hefty 500-watt DC hub motor. Coupled with its 9-speed Shimano Atlus gears and shifter, it makes pedaling uphill simply easier 
  • GET LOTS OF GRIP WITH THE TIRES. Its fat 26-inch tires are 4-inches wide
  • THROTTLE AND PEDAL ASSIST. Use the throttle to make rides on flat terrain effortless. It has a very intuitive Digital Torque Sensor that gives information to the 5-speed Smart Power Assist System (SPAS) that provides variable motor assist. 
  • ENJOY ITS MIND-BOGGLING RANGE. You will love using this bike because of its very long range. It can reach up to 70 miles on a single charge. 


 It is one of the best electric mountain bikes out there. It sports excellent power, long range, good ride characteristics, and reliability only a few bikes can match.

The main feature that makes X-Treme Rocky Road Electric Mountain Bike extremely capable is its 500-direct drive motor working with its sophisticated 9-speed Shimano Altus gearing. Its 500-watt motor is located in the rear wheel hub, providing torque directly to the wheel for quick acceleration even under load. Meanwhile, the 9-speed gearing adds torque from the pedals.

With the hefty motor output and use of 9-speed gearing, you can easily conquer steep and harsh mountain trails. Driving over speed bumps or potholes will make not slow down your commute in the city.



X-Treme Rocky Road Electric Mountain Bike features 26-inch Kenda tires that are 4-inch wide, covering plenty of ground so the bike will not slip. It provides much of the bike’s off-road capability. You can easily go travel uphill mountain trails, sand or snow. The oversized tires have low pressures, which makes it easier to have smooth rides over rough terrain. 



X-Treme Rocky Road Electric Mountain Bike has throttle and pedal assist modes to help you make commute and off-roading much easier. It is equipped with a variable speed throttle that you can control with the thumb lever.

Meanwhile, the Smart Pedal Assist System (SPAS) has five modes of support, which makes efficient use of the battery. With the SPAS, you can choose either additional assist or longer battery life.



The most important thing about electric mountain bikes is having a long range, so you can actually go and travel to the trail. Thanks to its state-of-the-art lithium battery, X-Treme Rocky Road Electric Mountain Bike can travel up to 70 miles on a single charge. With its range, you can travel any mountain trail even if you use the throttle mode a lot.



  • Bike Measurements: Max Seat Height = 40.5" Inches / Min Seat Height = 32.5" Inches / Handle Bar Height = 41.75" Inches
  • Box Size in Shipping: 63 x 10 x 30
  • Bicycle In Box Weight83 lbs
  • Bicycle Weight: 67 lbs
  • Suggested Max Weight: 350 lbs.
  • Notes*depends on rider weight & terrain Distance obtainable when using SPAS


    • Batteries: 48 Volt LiPo4 Lithium (lightweight)
    • Throttle Type: Variable Speed Thumb Throttle - SPAS Power Assisted - Pedal Power
    • Distance: Up To 70 Miles Range Using Low PAS & Flat Terrain While Pedal Assisting
    • MotorBafang 500 Watt Zero Resistance Rear Hub Motor With Clutch
    • Watts: 500 Watts
    • Amps: 10.4 AH Integrated Lithium Battery (15AH Optional Battery Pack Available for Purchase)
    • Volts: 48 Volts
    • Charger: 48 Volt Output UL Certified Charger (Charging Time +/- 3 Hours)


      • Frame Type: 6061-T6 Temper Aluminum Alloy - Very Lightweight
      • Derailleur: Shimano® 9-Speed Atlus Gears & Shifter
      • Braking System: Tektro Disk Brakes 
      • Tire Size: Kenda Oversized Mountain Fat Tire & Tube - 26 x 4.0 Inch on Aluminum Wheels
      • Forks: Oversized MOZO Hydraulic Front Forks
      • Suspension: Front Hydraulic Suspension Included & KS Rear Shock Suspension
      • Headlight: Yes, included as free accessory add on - Battery Operated Snap-On LED (Not covered under warranty)
      • Cargo Rack: Not Included. Can purchase separately.
      • Seat & Post: Aluminum Alloy Adjustable Seat Post & Velo Mountain Bike Seat
      • Quick Release: Front & Rear Wheels Have Quick Release Axles - Flip Lever
      • Gooseneck: Aluminum VP
      • HandlebarsAluminum Alloy Mountain Bike Handle Bars
      • Front Sprocket: Aluminum Alloy Sprocket
      • Front Wheel: Joytech Quick Release Hub
      • LCD Display: King Meter LCD Smart PAS Digital System With USB Phone Charging Port
      • Pedals:  Wellgo Aluminum Pedal Set
      • Controller: 48 Volt 15 Amp Sealed Smart Controller


          We offer a standard ONE Year limited warranty for our X-treme products against manufacturer defect and workmanship on all model bicycles and their components that are purchased directly from X-Treme or an authorized Dealer.  Original purchase receipt is required to establish proof of purchase and establish warranty start date.

          We will NOT offer a warranty on any products purchased from second hand sellers, non-authorized Dealers, products that are purchased used or products that are purchased via outlet centers.  We will offer free lifetime technical support access on these products & if parts are needed but those parts may be purchased from X-Treme.


          12 Month (ONE YEAR) Warranty & Lifetime Frame Warranty models include (Effective June 1st, 2018):

          S-48 48V - Baja 48V- Rubicon 48V - Sedona 48V - Catalina 48V - Santa 48V - Rocky Road 48V - Trail Maker Elite - Trail Climber Elite - X-Cursion Elite - Newport Elite - Malibu Elite - Alpine Trails Elite - Sierra Trails Elite - Cabo Cruiser - XB-504


          Your warranty begins the day the bicycle is delivered to you.  This warranty covers manufacturer defects and defaults only. We do not cover misuse or broken parts caused by the user or by any other event. We will pay for standard shipping service costs on the first & second warranty shipment only.   Any additional warranty parts that are needed will require the customer to pay all shipping costs.

          We do offer additional warranties for purchase to extend your warranty period.   Available for purchase are ONE Year Extended Warranty and LIFETIME Extended Warranty.   Yes! We will offer the option to extend your warranty for the entire life of your bicycle!   No other brand offers this extensive warranty. For more information please see the section below EXTENDED WARRANTY OPTIONS.


          Battery Warranty


          X-Treme brand offers a full ONE Year warranty on all bicycle batteries to the original purchaser.   City Rider battery is limited to 6 months (180 days). Your battery is warranted for any manufacturer defect in material or workmanship.   The battery will be repaired or replaced free of charge. Original proof of purchase is required to establish proof of purchase and warranty effective date.

          We require that defective batteries be returned to us for repair or exchange.  We do not pay the shipping fees to return the batteries to us however we will pay to ship the batteries back to you. If you have questions about our warranty, please contact our support department by calling 1(800) 357-5157 during business hours (PST). A friendly representative will get back to you quickly.


          ONE Year Battery Warranty models include (Effective June 1st, 2018):

          S-48 48V - Baja 48V- Rubicon 48V - Sedona 48V - Catalina 48V - Santa 48V - Rocky Road 48V - Trail Maker Elite - Trail Climber Elite - X-Cursion Elite - Newport Elite - Malibu Elite - Alpine Trails Elite - Sierra Trails Elite - Cabo Cruiser - XB-504


          Limited Warranty Details


          What is covered & what is not covered:


          1.     Shipping damage: Should your item arrive with damage that is a direct result of the assigned shipping carriers mishandling, we will replace those damaged parts free of charge under warranty as long as the damage is reported immediately after delivery.  In the event that the damage is determined to be extensive, (digital photos may be required by email), at X-Treme’s discretion and after careful consideration, we may arrange to have the item picked up and returned to X-Treme for free replacement.  ElectricBicycle.com will provide technical support via phone or through our Support Help Desk to assist customers with the replacement of parts but will not pay labor charges to install such parts.


          Freight Shipping Note:  The trucking company will contact you by phone to schedule your appointment for delivery (or pick up at terminal).  For Business and Residential Delivery, the item will be delivered to the end of your loading dock/driveway and will not be moved into your business, home or garage.    You must be present to accept delivery. Missed delivery appointments are subject to charges for additional delivery attempt. Please inspect the item for any visible damages upon delivery as any damage must be noted on the delivery receipt in order to be eligible for damage claims.  Do not refuse the shipment. Please notify our Customer Service Department immediately after delivery if damage has occurred.


          2.     Tires, tubes & kick stands: These items are NOT covered unless they are damaged as a result of shipping.


          If it has been 15-Days since you received your bicycle you may return in its original packaging in new/unused condition.   You may complete a return request by submitting a support ticket at april@relaxandridebikes.com.Return Terms and Conditions

          Return Terms and Conditions

          Refunds will be for 100% of the entire purchase price including the original shipping costs.

          Extended Warranties purchased will be 100% refunded when a bicycle is returned for a refund; within the extended warranty period only.

          At the discretion of X-Treme, a restocking fee of 15% may be deducted from refunds for items returned in their original condition within 15 days of purchase including but not limited to unauthorized returns.

          Customer is responsible for returning merchandise at their own expense.

          Merchandise must be received in 100% new, re-sellable condition. Merchandise is not eligible for refund if it has been ridden, worn, used, abused or damaged in any way. Merchandise must arrive complete (including warranty cards, manuals, accessories, promotional items, etc.) and in the original packaging.

          Customer must initiate return shipment of the merchandise within 15 days of the purchase date.

          Preparing your product for Authorized R.M.A. return shipment:

          1. Re-pack the merchandise securely in its original packaging, include the original contents of the box; warranty cards, Manuals, accessories, promotional items, etc.
          2. Include a copy of your invoice.
          3. Include a copy of the RMA notice you have received from us via our support department help desk.
          4. Clearly print your RMA# on the return shipping label (on the outside of the box).For your protection we recommend all returns be sent via UPS, Federal Express, DHL or other courier that issues a tracking number. We recommend that the shipment is insured. The customer is responsible for damage or loss during return shipping.

          Freight collect and COD packages will not be accepted.

          Contact us at april@relaxandridebikes.com to obtain an RMA number.

          *Customer is responsible for returning merchandise at their own expense.

          Once merchandise has been received and processed, credit will be applied to the account through which payment was originally made; which means we will refund your dealer or the store you purchased from and your dealer / store will have to refund you.

          WHY BUY FROM US?

          Relax and Ride Bikes was created to serve people who believe that biking is more than just an activity. Relax and Ride Bikes is a place where bikers who are passionate about biking can come to shop for the most exciting products we have to offer. We always strive to provide the best information, the best products, the best prices, the best customer service, and the best overall buying experience anywhere. This is why Relax and Ride Bikes is the #1 store for bike fanatics.


          We're a small team and truly care about your experience with us. Unlike the other "internet" companies out there that want just a simple transaction, we are here to help you every step of the way. After you place an order with us, you can expect an email from our President personally thanking you for your business.


          When you call us you get a real biker on the other line eager to help you out. Whether you are looking for a mountain bike, beach cruiser, or anything else, we truly invest ourselves in understanding our products. Most of the time, there is a good chance we have already tried them out ourselves!


          By working closely with a large number of the best brands, we are given a unique insight that you cannot find anywhere else. Our owners have taken the time to carefully select only the best brands with track records for excellent products. We hope you find our focus on providing great information and an unbiased opinion on all of our products refreshing.


          More Reasons to Relax and Ride Bikes:

          • Price Match Guarantee

            • Thanks to our strategic partnerships with our brands, we are able to offer the best prices you can find anywhere or we refund the difference.
          • Free Shipping

            • All orders shipped to the lower 48 U.S. states ship FREE. 
              • If you wish to ship to Alaska, Hawaii or Canada give us a call or shoot us an email and we can help with that as well.
          • No Sales Tax

            • We charge ZERO sales tax on our orders. With some of our most popular products ranging past $1,000 or more, those few % can add up to some nice savings.
          • 100% Safe & Secure Ordering

            • Our website uses SSL Encryption technology ensuring all sensitive payment or personal information submitted through the website is completely secure and protected.
          • Norton Shopping Guarantee

            • Includes $10,000 ID Theft Protection Coverage, $1,000 Purchase Guarantee, and $100 Lowest Price Guarantee all FREE of charge when you order with us.
          • Volume Discounts

            •  If you are looking to buy a large quantity of one item, we may be able to offer special pricing. Feel free to send an email to info@relaxandridebikes.com for a quote.

          • We Are An Authorized Dealer

            • Relax and Ride Bikes is an authorized dealer for all of the brands on our website. This means we are able to offer full manufacturer warranties on every order.
          • We Offer Financing

            • We offer the flexibility to pay for orders over $299 over time. Simply choose "Slice It. Pay over time with Klarna." at checkout.

          This is why Relax and Ride Bikes is the #1 Choice of Bike Fanatics!

          Lowest Price Guarantee

          We strive to offer the lowest prices online for our customers. If you find another online store that offers a lower price than ours within one month of your purchase, let us know and we will refund your original payment for the difference.

          To request your partial refund, e-mail us a link to the same product you bought from us on our competitor's website within one month from the date of your order.


          • The Price Match Guarantee includes the item price, it excludes any shipping cost & sales tax.
          • Promotions which bring the price lower than the MAP (Minimum Advertised Price) Pricing as set forth by the manufacturer.
          • The website cannot be an auction site
          • The competitor must be an Authorized Retailer for the product.

          To receive a price match refund, please e-mail us at april@relaxandridebikes.com, and send us the following details:

          • Your full name
          • Your order #
          • Your e-mail address
          • Your phone #
          • Name of the product you purchased
          • Competitor's Price
          • Web site address (URL) of the competitor's product offering

          Lowest Price Guarantee Terms & Conditions

          Competitor's product must be the identical model from an authorized U.S. dealer. Specifically, the product must have the same U.S. manufacturer's warranty, model number, contain the same components, and must be brand new (not refurbished). Competitor's product must be in stock. We reserve the right to verify another online company's product availability and price before issuing a price match or refund. We do not price-match on products listed on auction websites or member-only websites (such as sites that require a periodic membership fee). The Lowest Price Guarantee does not apply to obvious pricing errors or clearance or close-out items (since they are one-of-a-kind and priced according to their condition). The Lowest Price Guarantee applies to the cost of the item to purchase minus any charges to deliver the item, including shipping, processing, handling, taxes, and other applicable fees. The Lowest Price Guarantee applies to products offered online via e-commerce websites. It does not apply to private party sales or products sold at "brick-and-mortar" stores.

          Customer Reviews

          Based on 4 reviews Write a review


          Ask a Question
          • Need a bike that has good speed how fast is it

            Hello!    This ebike  has a max speed of 25mph, however speeds varies depending on your weight and terrain - also if you are using pedal assist or not. We have had some users report faster speeds beyond 25mph, but we can only legally tell you it’s top speed is 25mph for legal purposes. Thank you for reaching out! 

          • Can the Quiet Cat trailer be attached to this bike?

            The QuietKat cargo Trailer comes with BOB axle attachments compatible with the QuietKat bikes. For use with this eBike, you will need a BOB Axle from the Robert Axle Project. Click the link here to find your axle: Robert Axle Project – Select the correct axle for your bike 

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