Surface 604 Big Sky

TORQUE SENSING PEDAL ASSIST

World class torque sensing pedal assist - because an electric bike is only as good as it’s power distribution.

Precision torque sensing performance at 104 cadence pulses per revolution; 1,000 torque samples per second.

Big Sky’s incredibly smooth torque sensor knows how hard you’re pedaling down to the microsecond and matches it with proportionate power.

Custom drop out design delivers whisper smooth assist at any level.

POWERFUL 500W MOTOR

BAFANG 48V 500W electric motor purpose built for speed and power. Enjoy the quiet and consistent power distribution at any speed.

Geared for performance - we paired all that power with an industry-leading 12mosfet 25A controller giving the Big Sky unmatched torque and speed.

Leave other riders envious as you effortless fly past.

LONG RANGE BATTERY

Offering a high-capacity battery option: 48V20ah (960wh) 5000mah cell size, (Same as in Tesla), Samsung Cells 21700, Made in Korea, USB Plug, capacity indicator button.

Range up to 65 Miles (105 Kms)

Weight: 10.23 LBS (4.65 KG)

HANDLEBAR

Re-designed handle bar on 2024 bikes. Swept-back, cruiser design for a more comfortable riding position. 700mm wide, 30mm rise, 45 degrees sweep.

GEL SEAT

Selle Royal "Gipsy" Ergonomic Gel Saddle. Designed for city and tour use. Adjustable up to 9 degrees.

SOFTWARE UPDATE

SURFACE604 Display Updated Software: Select your desired pedal assist range, adjustable torque settings,
bug fixes, and more.

SURFACE 604 BIG SKY SPECIFICATIONS

MOTOR

500W (Peaks At 750W) Bafang Geared Hub Brushless Motor

DRIVE MODE

Drop Out Torque Sensing Pedal Assist with a Throttle

TORQUE

65Nm of Torque

THROTTLE

Thumb Push Activated Throttle

CONTROLLER

SURFACE604 Designed 12 MOS 48V 500W 25Ah, Smart Controller

TOP SPEED

20mph (32kmh)*, Comes as Class 2
(Unlocked) 28mph (45kmh), as Class 3

BATTERY

Included: 48V 20Ah / 960Wh
Samsung lithium-ion 21700 cells

BATTERY RANGE

Upto 65mi (105km) with a 48V20Ah Battery

BATTERY CHARGE TIME

3-4 Hours for a Full Charge from Empty

DISPLAY TYPE

SURFACE604 Color LCD Display with USB Jack
Bigger display: 3.5" for 2024

LIGHTS

Pre-wired for front and rear light (purchased separately)

FORK

Rigid Cruiser Front Fork, straight steerer

MOTOR WIRE HARNESS

30Ah, can handle up to 120C current

DERAILLEUR

SHIMANO ALIVIO 9-Speed

CASSETTE

SHIMANO 11-36T Cassette

SHIFT LEVERS

SHIMANO ALIVIO

BRAKES

TEKTRO Auriga E350 Hydraulic Disc Brakes
with Motor Inhibitors and 180mm Rotors

CRANK SET

SAMOX 42T Front Sprocket

ROTORS

180mm Front/Rear x 2.34mm Thick

BOTTOM BRACKET

SAMOX Sealed Bottom Bracket

BOTTOM BRACKET

SAMOX Sealed Bottom Bracket

FRAME TYPE

Tapered Headtube, Custom Reinforced Battery Mounts, Internal Cable Routing, Post Mount Brakes

FRAME MATERIAL

6061 Aluminum Alloy

STEM

ZOOM Aluminum

HEAD SET

*

HANDLEBAR

Cruiser style, 700mm, 45 degree backsweep, 30mm rise

PEDALS

WELLGO Platform, with Die Casting Body

CHAIN

KMC 9-Speed

SEAT POST DIAMETER

30.4mm

WHEELS/TIRE

Custom S604 Innova Tires 27.5" x 2.4"
with Reflective Sidewall

RIMS

Aluminum Alloy Double Wall Rim, 27.5”x13Gx36H

FRONT HUBS

*

KICKSTAND

Adjustable Heavy-Duty Aluminum

STANDOVER HEIGHT

Medium-Large: 31.5” (800mm)

RECOMMENDED RIDER HEIGHT

Frame Sizes: M/L - 19”
For Riders: 5’6”-6’4”

NET WEIGHT (INCLUDING BATTERY)

25.4KG/56lbs (12AH)
25.6KG/56lbs (14AH)
26.75KG/59lbs (20AH)

BATTERY WEIGHT

12AH battery 3.45KG/7.5lbs
14AH battery 3.63KG/8.0lbsv
20AH battery 4.65KG/10lbs

WEIGHT CAPACITY

285lbs (130kg)

STANDARD FEATURES

Adjustable Kickstand, Water Bottle Bosses

OPTIONAL UPGRADE FEATURES

18650 Samsung Cells 48V 14Ah lithium-ion battery OR 21700 Samsung Cells 48V20Ah Battery
NCX Suspension Seat Post, Büchel Shiny 120 Headlight
Rear LED tail light, SR Suntour XCM Suspension fork