X-Treme Boulderado 500W 48V Step-Through Fat Tire Electric Mountain Bike

Metallic White
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Looking for a durable, built-to-last, and feature-packed adventure bike for your next adventures? Then look no further! This bike is designed for all kinds of terrain and weather and comes with everything aluminum - every bolt, every nut, and each spoke. That means no rust! The 100% hand-welded lightweight aluminum frame bicycle has Atlus Shimano 9-Speed Gears & Shifting System, oversized MOZO Front Hydraulic Suspension, and aluminum rims with quick release axle on the front and a waterproof quick disconnect on the rear, and oversized Kenda 26 x 4.0 tires. 

The Boulderado 48 Volt electric fat tire step-through mountain bicycle is a lithium battery-powered bicycle cranking out 500W from the bafang high torque zero resistance clutch motor. This bike features a lightweight, compact lithium upgraded LiPo4 48 volt 17 Ah integrated battery pack providing a considerable amount of power beyond our 10 amp battery allowing for up to an additional 75 miles range (*depending on rider weight & terrain).

The Boulderado comes equipped with the King Meter 5 Speed Smart Power Assist System (SPAS). The electronics of the X-Treme Electric Bicycle are controlled via rider input on the LCD screen attached to the handlebars. Smart PAS with 5 speeds will enable the bike to operate nearly twice as efficiently as a non-smart assist e-bike because you select the power consumption (speed controls 1-5 setting) on the LCD during your ride. This feature will allow your Boulderado 48 Volt to possibly reach or exceed 150+ miles per charge when using low SPAS while always pedal assisting on flat ground under perfect conditions with a lightweight rider. The LCD also indicates Speed, Distance, and Battery Life.

The Boulderado 48 Volt Lithium Powered Electric Fat Tire Step-Through Mountain Bicycle is faster than any model we sell. It has been tested climbing a 5-7% mountain grade continuously for 45 minutes at 18 miles/hour while having to slow down for hairpin turns.

Owner's Manual -XTreme Boulderado Mountain Electric Bike

 X-Treme Boulderado Fat Tire Step-Through Electric Mountain Bicycle Specifications

Power Electric
Watts 500 Watts
Amps 17 AH Integrated Lithium Battery (Also available in 10 AH)
Volts 48 Volts
Battery 48 Volt LiPo4 Lithium (lightweight)
Drive System Chain Driven by Rear Hub Motor or Pedal Power
Distance Up To 150 Miles Range Using Low PAS & Flat Terrain While Pedal Assisting
Speed 25 Miles / Hour* On Throttle Only (Much Faster If You Pedal Assist 45+ Miles/Hour)
Charger 48 Volt Output UL Certified Charger (Charging Time +/- 3 Hours)
Tire Size Kenda Oversized Mountain Fat Tire & Tube - 26 x 4.0 Inch on Aluminum Wheels
Motor Bafang 500 Watt Zero Resistance Rear Hub Motor With Clutch

48 Volt 15 Amp Sealed Smart Controller

Braking System Tektro Disk Brakes 
Pedals Wellgo Aluminum Pedal Set
Front Wheel Joytech Quick Release Hub
Throttle Type Variable Speed Thumb Throttle - SPAS Power Assisted - Pedal Power
LCD Display King Meter LCD Smart PAS Digital System 
Cargo Rack Included
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
Derailleur 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
Handle Bars Aluminum Alloy Mountain Bike Handle Bars
Head Light Yes, included as a free accessory add on - Battery Operated Snap-On LED (Not covered under warranty)
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
Carton Size (L x W x H) 60 x 30 x 11
Bicycle In Box Weight 81.5 lbs
Bicycle Weight 70 lbs
Suggested Max Weight 350 lbs
Warranty 1 Year Warranty & 1 Year Battery Warranty
Notes *depends on rider weight & terrain distance obtainable when using SPAS


X-Treme offers a standard ONE Year limited warranty against manufacturer defects and workmanship on all model bicycles and their components. Please click on the link for X-Treme Bike warranty details.

Customer Reviews

Based on 1 review
Victoria White
Missing parts, pedal won't attach

Horrible at resolving issues

Hi Victoria,
Thank you for reaching out to us. We apologize for the inconvenience it may have caused you. As we have been communicating with you via email, we are happy to send you the missing parts right away once we get the photos that have been requested by the manufacturer, this is to ensure we ship you the correct parts, please respond back to our email and we will ship the missing part to you right away.

Thanks for your understanding.