Surface 604 Boar - Fat Tire Electric Bike | Electric Bike Revolution

Surface 604 Boar - Fat Tire Electric Bike

Surface 604: Electric Bike

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Surface 604 Boar - Fat Tire Electric Bike

1. Low-Profile Battery Placement

The Boar’s aluminum frame has been completely custom designed in Canada by Surface 604. It’s been designed for maximum stiffness and minimum weight with clean, sexy lines. Most importantly, we’ve placed the battery (discreetly) in the down tube, keeping the center of gravity low – lower than any other fat e-bike on the market. Add to that the short wheelbase and you’ve got an electric fat bike that rides like a Ducati motorcycle.

2. Ultra-quiet, High Torque Bafang Geared Hub Motor (350w)

The Boar comes equipped with Bafang’s next generation geared hub motor 350w. These new motors are incredibly silent compared with anything else on the market, weigh less and are so low-profile it’s hard to tell it’s electric. Geared hub motors have the advantage over direct drive motors in that they deliver high torque and are resistant to overheating when running at lower RPM’s. This is well-suited to carrying heavy loads up hills at slower speeds.

3. SRAM ”1 x 10” Transmission

The Boar comes standard with a SRAM 10 speed transmission (also known as a “1 x 10”), providing ample range of gearing by one of the most respected names in bike components. The 1 x 10 transmission requires no front derailleur, making shifting even more simple and also eliminating the left hand shifter. The result is a cleaner looking handlebar that provides all the gearing a rider needs for steep hills.

4. Torque Sensing Battery Management System (BMS)

Power delivery to the motor is regulated by a torque sensor in the dropout hanger that senses how much torque you apply to the pedals; the harder you pedal, the more power the electric motor provides. The result is smooth power delivery and a natural ride much like a regular bike. The torque sensor has the added benefit of acting like a Battery Management System (BMS). The power going to the motor is instantly reduced when you reduce the torque and turns off completely when you stop pedaling. The effect is greatly reduced power consumption, longer range, and longer battery life.

5. Tektro Hydraulic Disc Brakes

There really is no substitute for the stopping power, progressive feel and safety of hydraulic disk brakes and that’s why they come standard on every Boar fat bike. Carrying the heavy loads that the Boar for which the Boar was designed (thanks to optional front and rear cargo racks) makes the power of hydraulic all the more necessary. Winter riding? No problem. Tektro hydraulic brakes perform well in temperatures down to – 25 C (- 15 F) with some riders reporting high performance well below that temperature.

6. Suspension Fork Compatible (RST and RockShox)

RST Renegade Suspension Fork (available as an upgrade)

The Boar has been designed to be compatible with some fat tire suspension forks (RST and RockShox) for increased comfort and improved traction and handling in rough conditions. The new Renegade fork from RST is available as an upgrade from the Surface604 website. The Renegade is compatible with the Boar’s 15mm thru-axle hub.

7. Custom Built Cargo Racks - Front & Rear

A major advantage that electric fat bikes like the Boar have over other bikes is how well-suited they are to carrying cargo. That’s thanks to the electric assist which reduces rider effort and the fat tires that provide ridiculous stability – it really has to be experienced to be believed.

That’s why we’ve designed custom front and rear racks for the Boar that will transform your bike into a pick-up truck (hybrid powered of course!). The front rack has attachments for saddlebags (panniers) and a large platform conveniently sized to fit a 12-pack of beer. The rear rack also fits standard saddlebags (panniers) and is rated for a whopping 42kg (100lbs) of cargo.


Drive System- Bafang fat bike specific motor. Pedal Assist.

Motor- 350w+ (peaks at 750w) Bafang geared rear hub motor

Battery- 36V 13.3Ah / 478Wh Samsung Lithium Ion

Charge Time- 6 hours for a full charge from empty

Battery Life- Up to 50mi (80km) depending on mode

Weight Including Battery- 57lbs (26kg)

Frame Type- Tapered headtube, custom reinforced battery mounts, internal cable routing, post mount brakes

Frame Material- 6061 Aluminum Alloy

Fork- Proprietary design, tapered steerer, 150mm x 15mm thru-axle

Pedals- Wellgo platform

Top Speed- 20mph (32km/h)

Rims- 26″ x 80mm single wall aluminum (standard)

Brakes- Tektro Auriga hydraulic disc, post mount, 160mm rotor

Grips- Full length 122mm, black colour

Rear Derailleur- SRAM X5 10-speed

Shift Levers- SRAM X5 trigger shift

Crankset- FSA 36T, Q-factor 209 Fat Bike Crankset

Seatpost Diameter- 27.2mm

Tires- 26″ x 4″ Kenda Juggernaut (standard)

Sizes Available Small-Medium: 17.5″ or Medium-Large: 19″


Frame Size

                                                                      S/M                   M/L

TTH.     Top Tube Length                           59.3 cm             62 cm

HTL.     Head Tube Length                         14.5 cm            14.5 cm

STL.     Seat Tube Length                          44.5 cm            48.3 cm

CSL.     Chainstay Length                          45.5 cm           45.5 cm

WB.      Wheel Base                                 110.7 cm          113.4 cm

Recommended Height:                           Below 5'8"       5'8" and Above 

Order Confirmation:

Immediately after placing an order online, you will receive an email confirming the details of your order.

Should the item purchased be unavailable, not in stock or have a longer than usual lead time, a member of our team will reach out via phone or e-mail to find a probable solution.

Order Shipment:

A tracking number will be emailed as soon as the order is ready for shipping.

If you do not receive tracking information from us within six business days of your order, please follow up with us at

Alaska and Hawaii:

Please note, if you live outside the continental USA please call us or write us to get a free quote, additional charges may apply to your shipment.

Damaged Shipment:

Please inspect the packaging of your item(s) upon arrival and make note of it when signing for delivery. If your item(s) arrived damaged, please send photos to and we will process an exchange for the same item or return.

Cancellations & Refunds:

Order cancellations must be received within 24 hours of placing an order. If your order has shipped, you (the buyer) will also be responsible for the return shipping charges.


***Please check our warranty page for manufacturer specific return policies before reading our general return policy below.***

No returns will be accepted if used or not in original packaging and new condition.

Please contact us first before returning any items. We accept returns if it meets the following requirements:

  • Return must be initiated within 14 days of original order date.
  • Must provide proof of purchase from
  • Must be brand new, never been used
  • Original packaging and all items originally included by the manufacturer (including all manuals, accessories and other included or bonus items).
  • Returns are subject to a 20% restocking fee. 
  • Buyer pays for return shipping.


    If you have any issues with your product, please send an email to our customer support team at and we will assist you in filing a warranty claim with the manufacturer of your electric bike, part, or accessory.

    Please note, if you're simply unhappy with your bike and don't see the manufacturers return policy below or in the product description, please contact us directly and we will help you find a solution.

    Manufacturers warranty and return policy:

    Whether you are a new customer or a returning one; our mission is to not only offer you the best-in-class service but also the best prices online.

    Should you find a lower price from another online-only dealer, we will refund you the difference within 30 days of the purchase date. Tell us which competitor is offering the lower price; we will verify the price and process your refund.

    If our own price is reduced, present us with your original receipt within six months of purchase and we will refund the difference.

    Here are some terms and conditions:

    • The item must be of the same brand and model.
    • The item must be new and factory sealed.
    • Competitors’ prices must be in US dollars and will be adjusted for any fees, taxes or other charges such as environmental handling fees and shipping.

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