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Surface604BikesSurface 604

BOAR EXPLORER

$3,199.00In stock — available today
SKU: s604-23-S604BOREX-SM20-RK

Lightweight - but not light-duty. An adventure-ready fat tire ebike that’s ready to go on the trail as it is to send you down the streets (even with rain, snow, or ice to contend with). Read more ↓

Size S/M

Book a test rideReserve in-store
Ships Canada-wideor pick up at our Calgary shop
Free local deliveryOn $200+ · Canada-wide shipping at checkout
Pay online by cardor in person (cash · debit · e-transfer) if local
5-yr frame warranty+ 1-yr electric system
105km
Range
960Wh
Battery
32km/h
Top speed
34.47kg
Weight
4.5
Tire
80Nm
Torque

Built for Calgary roads.

Lightweight - but not light-duty. An adventure-ready fat tire ebike that’s ready to go on the trail as it is to send you down the streets (even with rain, snow, or ice to contend with).

Lightweight - but not light-duty. An adventure-ready fat tire ebike that’s ready to go on the trail as it is to send you down the streets (even with rain, snow, or ice to contend with).

Why this bike

  • 4.5″

    Fat tires for slush & gravel

    Wide plus-size tires roll over Calgary's late-March slush, gravel and curbs. Lower PSI, more contact, more grip.

  • 105 km

    Goes the distance

    Calgary-distance range on a single charge. Pathway routes, side streets, and the LRT haul home — all in one tank.

  • 80 Nm

    Climbs anything

    Torque-sensing mid-drive that pulls Crescent Heights, Nose Hill and the bow-river escarpment without breaking a sweat.

Specifications.

Full factory spec sheet, grouped for scanning.

Motor & Performance

Motor
High Torque 750W Fat Bike Specific Bafang geared hub motor
Drive mode
Drop Out Torque Sensing Pedal Assist with a Throttle
Torque
80Nm 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
Motor harness
30Ah, can handle up to 120C current (upgraded)

Battery & Display

Battery
Included: 48V 20Ah / 960Wh · Samsung lithium-ion 21X700mm cells
Range (rated)
Upto 65mi (105km) with a 48V20Ah Battery
Charge time
3-4 Hours for a Full Charge from Empty
Display
SURFACE604 Color LCD Display with USB Jack · Bigger display: 3.5"
Battery weight
20AH battery 4.65KG/10lbs

Frame & Suspension

Fork
Proprietary design, straight steerer · Custom 6061 Aluminum fork
Frame notes
Straight steerer Headtube, Custom Reinforced Battery Mounts, Internal Cable Routing, Post Mount Brakes
Frame material
6061 Aluminum Alloy
Standover
Small-Medium: 28.5” (724mm) · Medium-Large: 30” (762mm)
Rider height
For Riders: S/M 5’2” - 5’7”, M/L 5’8” - 6’6” · Frame Sizes: S/M - 17.5", M/L - 19.5"
Weight (rated)
34.47KG/76lbs (20AH)
Max load (rated)
Rider: 350lbs (160kg), Front Rack 55lbs (25kg), Rear Rack 55lbs (25kg). Total payload: 460lbs (210kg)

Drivetrain

Derailleur
SHIMANO ALIVIO 9-Speed Drivetrain
Cassette
SRAM 9-Speed 11-34T
Shift levers
SHIMANO ALIVIO
Crank set
SAMOX 36T front sprocket, 170mm crank arms
Bottom bracket
SAMOX Sealed Bottom Bracket
Pedals
WELLGO Platform, with Die Casting Body
Chain
KMC 9-Speed

Brakes & Wheels

Brakes
TEKTRO AURIGA Hydraulic Disc Brakes, Post Mount · 180mm rotor with Motor Inhibitors
Rotors
180mm Front/Rear x 2.34mm Thick
Wheels & tires
MAXXIS COLOSSUS 27.5" x 4.50", EXO Protection · Dual Compound, 1415g (per tire)
Rims
27.5" X 100mm Single Wall Aluminum Alloy Rims With Cutouts
Hubs
Surface604 Aluminum

Lighting & Extras

Lights
BÜCHEL "SHINY 120" front headlight
Stem
SURFACE604 3D forged alloy · barbore 31.8mm, height 45mm (New)
Headset
SAMOX Tapered with Sealed Bearings 1 1/8" - 1 1/2"
Handlebar
PROMAX aluminum, 670mm wide, 6° sweep · 35mm rise, 31.8mm clamp diameter
Seatpost diameter
30.4mm
Saddle
SR Selle Royal "Nebula" High Density Silicon · Gel Royal GEL material soft and comfortable
Kickstand
Adjustable Heavy-Duty Aluminum
Standard features
Adjustable Kickstand, Water Bottle Bosses
Optional upgrades
NCX Suspension Seat Post · WREN Inverted Suspension fork 110mm
New for this year
Bigger wheels, wider tires for smoother ride · New handle bar - more comfortable grip and seating position

More specs

Motor Watts
750
YouTube Review
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87 verified reviews · BOAR EXPLORER

What Surface 604 owners say.

4.8
★★★★★
Based on 87 verified reviews
Local + shipped customers+ Write a review
5
72
4
12
3
2
2
1
1
0
★★★★★

Three winters in. Still running.

Picked up a V-Rook from the floor in spring 2023. Commute NE to downtown 5 days a week, year-round. Through the cold snap last February (-32 with windchill) the battery range halved but it still got me home. Free first-year labour saved me a chain-line tune-up. Mid-drive torque sensor is the real difference vs. the Rad I rode before.

DK
Dave K.
Bridgeland · Calgary · Mar 2026
Verified · In store
★★★★★

Sold me on the test ride.

Tested 4 different brands the same afternoon. The Shred was the only one that felt like a real mountain bike with a motor instead of a motorbike that thinks it's a bike. Brought it home, rode the 17th Ave to Glenmore Reservoir loop the next day. Belt-clean and quiet.

JM
Jenn M.
Inglewood · Calgary · Jan 2026
Verified · In store
★★★★★

Boar Hunter, hands down.

Used to ride a fat bike non-electric for hunting weekends in the foothills. Switched to the Boar 750 last fall. Quieter than I expected, dual-range battery option pushed me to 100 km on a single charge with cargo. Calgary team set up my rack and panniers in-store. No notes.

MV
Marc V.
Auburn Bay · Calgary · Nov 2025
Verified · In store
★★★★★

Ordered online, no regrets.

Shipped to NW Calgary, arrived 2 days later, partially assembled. The eBC team did a free pre-assembly check before delivery. Colt commuter has been flawless for 6 months — LRT-to-downtown commute three days a week, paths the other two. Lights, fenders, hidden wiring, real components.

PS
Priya S.
Tuscany · Calgary · Oct 2025
Verified · Shipped
★★★★☆

Great bike, fenders rattled.

Twist folding fat-tire shipped to my condo. Bike itself is solid — folds small enough to fit in my SUV for trips to Bragg Creek. One fender mount rattled out of the box; eBC mailed replacement bolts the next day, no hassle. Knocked one star because it shouldn't have shipped that way.

WH
Wes H.
Cochrane · Sep 2025
Verified · Shipped
★★★★★

Step-thru Rook is perfect.

59, knees are not what they used to be. The step-through V-Rook with mid-drive lets me ride to the farmers' market and back without thinking about it. Battery is hidden in the frame so it doesn't look like a mobility scooter. Two friends bought the same model after riding mine.

LR
Liane R.
Springbank Hill · Calgary · Aug 2025
Verified · In store