Skip to product information

X-Treme Boulderado 48V 10ah Fat Tire Step-Through Electric Mountain Bicycle

X-Treme Boulderado 48V 10ah Fat Tire Step-Through Electric Mountain Bicycle

Regular price
Price: $1,999.00
Regular price
List Price: $2,199.00
Sale price
Price: $1,999.00
You save: $200.00 (9%)
Why Buy From Crankworks BicyclesWhy Buy From Crankworks Bicycles

One of the fastest step-through electric mountain bicycles we carry! The X-Treme Boulderado cranks out an impressive 500 Watts of power courtesy of the Bafang high torque zero resistance clutch motor. Along with the 48 Volt 10.4ah integrated battery pack this eBike provides an enormous amount of power even greater than our 24 or 36 volt models. 

The Boulderado is made of 100% hand welded lightweight aluminum so pumping up hill is easier with all of that power at your disposal. The Smart Power Assist System (SPAS) is easily operated via the LCD screen on the handlebars. There are 5 speeds and you select the power on the setting from 1-5. The LCD also indicates speed, distance and battery life.

Under perfect conditions with a light weight rider on flat ground it can be possible to reach or exceed 70 + miles per charge when using the low PSAS.  

Oversized Kenda 26 x 4.0 tires are coupled with front & rear Tektro disc brakes so stopping on a dime is not a problem. These tires coupled with the oversized MOZO front hydraulic suspension makes riding rough terrain and doing downhill a breeze. 

You can upgrade to the 17ah Battery model and increase your range to up to 150 Miles. 

If speed and power are your thing then the Boulderado is for you.  

Also check out our X-treme FAQ page here


Colors: Black, White

Motor: Bafang 500 Watt Zero Resistance Rear Hub Motor with Clutch

Battery: 48 Volt 10.4ah LiP04 Lithium (lightweight)

Battery Charger: 48 Volt Output UL Certified Charger (Charging Time + /- 3 Hours)

Range: Up to 70 Miles Range Using Low PAS & Flat Terrain While Pedal Assisting 

Drive System: Chain Driven by Rear Hub Motor or Pedal Power

Tire Size: Kendra Oversized Mountain Fat Tire & Tube - 26 x 4.0 Inch on Aluminum Wheels 

Throttle Type: Variable  Speed Thumb Throttle - SPAS Power Assisted - Pedal Power

LCD Display: King Meter LCD Smart PAS Digital System

Controller: 48 Volt 15 Amp Sealed Smart Controller

Speed: 25 MPH on Throttle Only ( Much Faster if you pedal assist 45+ MPH)

Frame Type / Size: 6061-T6 Temper Aluminum Alloy - Very Lightweight - Step-Through

Forks: Oversized MOZO Hydraulic Front Forks

Suspension: Front Hydraulic Suspension Included

Front Sprocket: Aluminum Alloy Sprocket

Derailler: Shimano 9-Speed Atlus Gears & Shifter

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

Handlebars: Aluminum Alloy Mountain Bike Handle Bars

Brakes: Tektro Disc Brakes

Pedals: Wellgo Aluminum Pedal Set

Front Wheel: Joytech Quick Release Hub

Headlight: Yes, included as free accessory add on - Battery Operated Snap-On LED 

Accessories: Drink Holder on Handle Bars Included

Bicycle Measurements: Max Seat Height = 41.3" Inches / Min Seat Height = 33.5" Inches / Handle Bar Height = 43.3" Inches

Cargo Rack: Included

Maximum Rider Weight: 350 lbs

Bicycle Weight: 70 lbs

Warranty: Click Here for X-Treme Warranty Information




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. If your item(s) are available for immediate shipment (within 5 business days), 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  

Damage/Loss During Shipping

If an item is damaged or loss during shipping please contact the manufacturer directly and they will provide you with assistance getting a replacement or repair. The manufacturer's website address and/or phone # will be listed in the manual that's included with your e-bike. If for some reason the manufacturer is unable or unwilling to help you, please contact us for assistance.


Price Match

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 we'll 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 



Customer Reviews

No reviews yet


Add customer reviews and testimonialsI love exploring and my e-bike allows me to get out so much farther for longer without expending more energy. Thanks Crankworks for the cool mtb e-bike. to showcase your store’s happy customers.

Alex M.

I find myself getting out more often with Sam and we both get great exercise. I love the fact that I can pack his and my stuff on my rack!

Heather W.

Our group rides have definitely changed since I got my QuietKat Warrior. It's become much easier as an "older dude" to keep up with the youngsters out in the woods! Loving my e-mtb!

Jay F.

I love doing a 12 mile bike loop around our lake every weekend, but it was starting to be a bit much for my knees & back to handle. The electric assist on my e-bike has been a god send! Thank you so much for making my favorite weekly activity possible & enjoyable again!!

Sally M.