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BLOWOUT SALE:  Take 15% Off Using Code Sierra15 @checkout.  Limited Time! 


  • ZERO RESISTANCE GEAR REAR HUB MOTOR- If you want to ride without power, you will feel zero resistance in your legs while pedaling.  This is a HUGE improvement over Sierra Trails motors used in the past 12 years!
  • NEWLY STRENGTHENED PACKING- We listened to customer feedback and are packing this bike in reinforced cartons, minimizing the risk of shipping damage.
  • ALL UPGRADED PARTS- Seats, grips, brakes, tires have all been upgraded.

The 2017 X Treme Sierra Trails Electric Mountain Bicycle comes with free shipping and no sales taxes.

This e-bike has been renamed Sierra Trails (previously XB-305-SLA).  It comes in a Black or Silver finish.  The difference between the Sierra Trails and the Alpine Trails is that the model shown here has a step-through frame which allows for easier access; hence ideal for ladies.  Men can also purchase this bike if they want easier access.

This electric bicycle is battery powered and run by a powerful 300 Watt rear hub motor, making it a motorized hybrid bicycle.  The motor is conveniently and entirely sealed in the rear wheel, hence there are no moving parts visible to the rider.  

This x treme electric bike is made with all top of the line components including:  7 Speed Shimano Tourney Gears & Shifter System, 2 SLA E-Bike Batteries In A Sealed Pack, a 100% Steel Frame, fully Adjustable Seat, and 26 Inch wheels with Kenda brand tires

While riding, the rider can conveniently select from 3 options:

  • Twist the throttle and take off under electric power only. 
  • Press the PAS button (Power Assist System) on the handlebar and the electric battery power will only kick in while you are pedaling. 
  • Turn off the PAS system and simply pedal the bicycle like you would any other bicycle and ride with the power off. When you are ready for assistance, simply turn the right throttle grip and the power is there for you immediately.

This X-Treme Sierra Trails Electric Bicycle will travel up to 20 MPH for approximately 20 miles on a single charge.  It will take only 4 hours to recharge (Charger included).

    Why BUY This Electric Bicycle:

    • Excellent Manufacturer's Warranty- 180 Days X-Treme Warranty on parts, 365 days Warranty on battery, LIFETIME warranty on frame.  Click on Warranty tab for more info
    • Powerful 300 Watt Motor- enables you to ride along with little pedaling effort
    • Environmentally friendly- have fun and do your part for the environment!
    • Lightweight- but can support a body weight of up to 350 lbs
    • Step Through Frame- built for easy access, ideal for ladies
    • No driver's license- just ride and go like any bicycle
    • Up to 20 miles and 20 mph- on a single charge
    • Less Than $1- to charge overnight

      Here is X-Treme Scooters being featured on ABC News.

      Electric Bicycle QUICK HARD FACTS:

      • Energy Efficient- Electric bicycles consume fuel at an average rate of 100-150 watts of electric energy, compared to 15000 for a car (the car does travel faster of course).  Imagine a 100 Watt light bulb burning continuously through the night- that is enough energy to propel an electric bicycle for 40 miles.   
      • Cost Efficient- An electric bike typically costs $0.05 to run per mile, while a car can cost up to $0.50 per mile.  You can drastically reduce your costs by choosing e-bikes over cars. 
      • Green- When an electric bike replaces a car, it offsets 1460 grams of carbon monoxide, 1550 grams of globe-warming hydrocarbons, and 770 grams of nitrogen oxides for every 500 miles traversed.
      • Fitness- A recent survey found that 33% of electric bike owners ride their bike at least once a day and 80% of them ride at least once a week.  Only 10% of conventional bike owners ride their bike once a day and 45% of them ride once a week.  These percentages confirm that owning an electric bike compels you to use it more, hence enabling you to exercise more. 
      Product Specifications:
      300 Watt
      Motor Type:
      Brushless Hub Motor - Motor is in center of rear wheel
      Gears & Speed's:
      7 Speed Shimano Tourney® Gears & Shifter
      15 AMP Circuit (2 Batteries at 12 AMP's each)
      24 Volts (Each Battery Is 12 Volts)
      2 Large SLA Batteries In A Sealed Removable Pack
      Key Locked On/Off Switch & Key Locked Battery Pack
      Tire Size:
      26" x 1.95" on Aluminum Wheels
      Smart Charger Included
      Tool Kit:
      20 MPH
      15 to 20 miles per charge - can still pedal if charge is lost
      Throttle Type:
      Twist Throttle or Pedal & Power Assisted (PAS) or Pedal Only
      Frame Type/Size:
      100% Steel Frame / 18"
      Frame Style:
      Step-Through Frame
      Front Shocks
      Braking System:
      Front And Rear Brakes
      Drive System:
      Rear Hub Motor (Motor Is In Rear Rim) + Pedal Power
      Head Light
      LED Light Included (Battery Operated Clamp On)
      E-Bike Dimensions:
      Wheel to Wheel 72" - Width 25" - To Bars 38"
      Seat Height:
      Adjustable Seat Height 33" to 39"
      Carton Size (LxWxH):
      54.5 X 9.25 X 27.5 Inches
      Shipping Weight:
      76 Lbs
      Bicycle Weight:
      65 Lbs (With battery pack installed) Ready To Ride
      Battery Weight Only:
      21 Lbs (This is the weight of the battery pack if removed)
      Maximum Rider Weight:
      350 Lbs
      Battery Indicator:
      Cargo Rack:
      Not Included
      180 Day (6 Month) X-Treme Warranty - 1 Year Battery Warranty
      Lifetime Warranty:
      The Frame Is Warranted For Lifetime
      *depends on rider weight & terrain

      FREE SHIPPING and NO SALES TAXES on ALL orders (in the lower 48 states)!*



      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 for shipment. 

      If your order is in stock and we process the charges to your credit card it will ship and ARRIVE within 5-7 business days from the date of shipment to your address, unless otherwise stated for specific products.  Some larger products (ATVs, go karts etc) will take longer than 5-7 business days as they require time to inspect and ship by special freight carrier.

      We will send you tracking information to the e-mail address you provide when checking out.  If you do not receive tracking information from us within 5 business days of your order feel free to follow up with us at

      Please note we do not ship to PO Boxes. 

      Please note we do not do overnight or expedited shipping, unless otherwise stated on specific products.


      Please inspect the packaging of your item(s) when they arrive.  IMPORTANT:  If the item is damaged, you can sign for it as Damaged and we can then file a claim with Fedex/UPS and have the item sent back and replaced.  However, if there is damage and you sign for it as Not Damaged, then we will need for you to send information and photos on the damage so that we can work with you to resolve the situation.  You can send photos to

      Upzy (formerly Super Scooter Store) does not pay or reimburse any labor costs undertaken by the customer on his/her own accord.



      If you are not completely satisfied with your purchase, please email us at  We can arrange a return authorization within 15 days of the receipt of your product.  The product must be returned in the resale-able condition it arrived in, with its original boxes, for a refund or exchange (no damaged items).  Return tracking number must be provided.  

      Buyer is responsible for all return shipping costs.  There is a 15% restocking fee for all returned items.

      *Please note that each manufacturer's return policies may vary and we ultimately adhere to each manufacturer's return policy (they override ours).  It is important to contact us for further clarification first.



      Order Has Not Shipped:  $25 administration fee when canceled.  This is to account for the manpower hours used to prepare your product, which tend to be large in size.  If product is not in stock, you will not be charged this fee.

      Order Has Shipped:  Buyer is responsible for return shipping charges and a 15% restocking fee unless otherwise stated.  

      Buyer's Remorse Return or Refusing A Shipment When It Arrives:  Buyer is responsible for delivery (outbound) and return shipping charges and 15% restocking fee, unless the shipment comes visibly damaged and defective.

      *Please note that each manufacturer's return policies may vary and we ultimately adhere to each manufacturer's return policy (they override ours).  It is important to contact us for further clarification first.

      Refunds will be issued to the original credit card or Paypal account that you used when placing your order.  



      We work very hard to ensure that we offer the absolute lowest prices online.  We want you to feel confident that you are getting the lowest price for your product compared to any other online store, and we will match their lowest price accordingly.


      Our 100% Price Guarantee has some limitations:

      • It does not apply to prices for our own store bought at different dates.  We reserve the right to change prices due to fluctuating sale prices from our manufacturers 
      • Promotions such as rebates and buy one, get one free offers are not eligible
      • The item must be in stock on the competitor website
      • The competitor must be an online store, they must not have a retail location
      • The website cannot be a discounter or auction website (eg eBay, Overstock, etc)
      • The competitor must be an Authorized Dealer for the product in question
      • The Price Match Guarantee is for the final price after shipping and sales taxes.  A lot of online stores advertise a lower price but tack on shipping charges and sales taxes in the checkout process, ultimately making their price higher than ours.  We never have hidden fees. 

      Feel safe knowing that you are purchasing the best possible price online from Upzy (formerly known as Super Scooter Store) - Buy from us today!


      All warranty queries on your purchase, please go to and Submit a Ticket.  

      X-Treme Scooters offers a 30-day limited bumper-to-bumper manufacturers warranty on all scooters and accessories on all models that are purchased from an authorized dealer and up to 90 days on certain listed models. Original purchase receipt required. X-Treme Scooters will provide replacement parts during the warranty period, but will not pay for labor charges to install such parts.

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

      Selected 90 day warranty models include:
      Electric Bicycle's XB-504 - XB-200Li - XB-210Li - XB-300-SLA - XB-305-SLA - XMB-400 - XG-575-DS - XG-555, X-650

      Selected 180 days Warranty models include:
      Trail Maker, Trail Climber

      Selected Limited Lifetime Warranty On Frame:
      Trail Maker, Trail Climber

      The warranty starts the day the scooter is delivered to you.  This warranty covers factory defects and defaults only. We do not cover misuse or broken parts caused by the user or by any other event.  X-Treme Scooters 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.

      Battery Warranty
      We offer a full 6-month even trade warranty on defective batteries.

      Selected 1 year battery warranty models include:
      Models Trail Maker - Trail Climber 

      If any battery should become faulty within the specified warranty period we will replace the battery free of charge. X-Treme requires that defective batteries be returned to us for exchange. X-Treme Scooters does not pay the shipping fee's to return the batteries to us however we will pay to ship the replacement batteries back to you. If you have questions about our warranty, please contact our support department by opening a ticket only. A friendly representative will get back to you quickly. Our support department hours are Monday through Friday 9 AM to 5 PM PST.

      Gasoline Engine Warranty
      We offer a 30 day warranty on all gas engines for all models.
      We offer a 90 day warranty on select models: XG-575-DS 

      Defective engines must be returned to X-Treme Scooters at the customers expense & will be replaced if X-Treme Scooters determines the engine is defective due to a factory defect.
      X-Treme Scooters will pay the shipping cost to send the replacement engine to the customer.

      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, X-Treme 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 e-mail), at X-Treme’s discretion and after careful consideration, X-Treme may arrange to have the item picked up and returned to X-Treme for free replacement.  X-Treme 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.
      2. Tires, tubes & kick stands: These items are NOT covered unless they are damaged as a result of shipping.
      3. During your applicable warranty period: X-Treme Scooters will replace any defective part free of charge and free of shipping charge to the end user of the scooter. X-Treme may require certain parts to be returned to X-Treme before replacing those parts. Shipping costs back to X-Treme must be paid for by the end user / customer. Call tags will never be issued.

      Gas Scooters Models Starting With 'XG' Warranty
      1. Engines are covered. Each engine is started, tuned up and tested before we ship the gas scooter to you. Failure to premix oil with the gas voids the engine warranty.
      2. Pull starters are not covered. Spare scooter pull starters can be purchased online.
      3. Tires, tubes & flat tires are not covered unless damaged during shipping. (Damage must be reported to us immediately.

      Who do I contact regarding replacement parts or warranty queries?

      Contact X-Treme directly by submitting a ticket at  This is the fastest way to get help.  They have a tech team onsite that can answer your questions.

      What if I'm not happy with my X-Treme product?

      Please read our Shipping and Returns section on our policies.  The manufacturer will send you any replacement parts that are deemed defective within the the warranty period, and provide unlimited technical support during this period  If you still want to return the item, you are responsible for return shipping costs and a 15% restocking fee.  This is because X-Treme items are not small items, and we have already shipped it out to you for free, so any returns will require manpower hours and return shipping expenses that the buyer is liable for. 

      What is the height range on X-Treme electric bicycles?

      There is no specific height range.  You can be as short as five foot to well over six feet, all electric bicycles are height adjustable- one size fits all.

      What happens when my X-Treme product gets rained on?

      Your scooter/bike will be fine as long as the battery does not submerge in water.  The battery is not exposed, so even when riding in the rain, it will be kept dry.  

      What is the weight that is supported?

      Please take a look at the Info tab, it will have a table where you can see the weight supported.  

      How long does it take to charge the battery?

      This depends on the specific X-Treme model, but in general you can do a single charge in 4 hours.  Please refer to the Info tab for more information on this if necessary.

      Is there a Warranty on this product?

      There absolutely is!  Please click on the Warranty tab on this product page to view comprehensive Warranty details.

      Do you have to get a driver's license or register with the DMV to use this scooter/bike?

      No you do not!  One of the great perks of owning an electric scooter/bike means you do NOT need to get a license.

      Are electric bicycles the new IN thing now?

      Yes they are.  As e-bikes get more and more affordable, everyone is able to purchase one, not just the well-off. Although here are some celebrities that enjoy their electric bikes:

      Leonardo Di Caprio and Blake Lively.

      Prince Charles cruising around on his electric bicycle.


      Your answer not found here?  Fear not-contact us directly at 1 (800) 268 0719, email us at or send us a chat at the bottom right of the screen for assistance!



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