Bikes. Parts. Chaos.

Big Easy is a long-tail electric cargo bike that expands what’s possible by bike.

Riding loaded with cargo is core to us here at Surly, whether we’re running a front rack and bag setup or a full-blown cargo bike and trailer. There are times, however, when even the strongest riders are limited in what they can haul, so we created Big Easy, our long-tail electric cargo bike. Consider it the 18-wheeler of the cargo bike world, minus the diesel fumes.

When it comes to geometry, Big Easy rides and feels like a normal-length bike. We also increased stand-over height clearance and threw in dropper post routing to promote bike sharing across different-sized riders. So whether you want to wave goodbye to the old family gas hog, upgrade your bike-supported business’s two-wheeled fleet, or simply haul more bowling balls during your daily commute, Big Easy makes doing all that, well, easy.

  • Full component set perfectly suited for electric cargo bikes, including four-piston Tektro brakes
  • Equipped with Bosch Performance CX, their most powerful drive unit
  • Damping headset for smooth and stable handling under heavy loads
  • Capable of running dual batteries for extended range, if you’re into that. (All mounting hardware and wiring included.)
  • Large-volume 26” x 2.5” ExtraTerrestrial tires and durable wheel builds
  • Big Easy available for purchase in the US only (available in Canada Fall 2019)
  • Frame integration with Surly Bill and Ted trailers for maximum cargo potential

Bike Capabilities

  • 5/5 with Car Replacement
  • 3/5 with Off Road
  • 5/5 with Electric Assist
  • 5/5 with Passengers
  • 5/5 with Trailer Compatability

NOTE: You can ride your bike wherever the hell you want, but this is what we think this bike is best at.

Big Easy riding with cargo in the street
Big Easy close up riding
Big Easy riding and hauling cargo
Big Easy headtube and fork detail
Big Easy decal close up
Big Easy complete bike side view in a parking lot
Big Easy hauling loaded cargo trailer
Big Easy riding down street with two kids aboard
Big Easy detail of Bosch battery and assist motor
Big Easy detail of drive side Bosch battery and assist motor
Big Easy detail of Bosch Purion display
Big Easy riding with two kids through the grass
Big Easy riding from trail to turn over a bridge

Where to Buy

Surly Big Easy Cargo eBike - Tan Cargo Shorts



Frame Surly Big Easy Frame for Bosch Mid Drive
Fork Surly Big Easy Fork
Seatpost Clamp Surly Stainless


Headset Cane Creek ViscoSet [tuned for Surly Big Easy] upper. 40 series lower
Brakes Tektro Orion 4 Piston HD-M745
Brake levers Tektro
Shifters SRAM NX 11 speed
Grips Velo single lock-on
Rotors Tektro 6-Bolt 180mm
Stem ProMax 4-bolt 31.8mm clamp
Handlebar Salsa Bend 17 degree. No logo
Saddle WTB Volt
Seatpost ProMax 2-Bolt. 30.9mm
Kickstand Alloy w/ Stainless bolt


Drive Unit Bosch Performance CX [20m/h]
Battery Bosch PowerPack 500
Display Bosch Purion
Crankset Miranda for Big Easy
Bottom Bracket included in Bosch Unit
Front derailleur N/A
Rear derailleur SRAM GX
Cog or cogset SunRace CSMS7 11-42
Chain KMC X11e


Front hub Shimano M525, 32h, QR
Rear hub Shimano M525, 32h, QR
Rims WTB STS i29 TCS
Tires Surly ExtraTerrestrial 26x2.5" Tubeless Ready

Complete bike spec subject to change

MY19 Big Easy Geo
  • in
  • mm
Reach 16.2 411 17.0 431 17.6 448
Stack 22.3 567 23.4 595 24.5 623
Head Tube Angle 69.0° 69.0° 69.0°
Head Tube Length 5.9 150 7.1 180 8.3 210
Seat Tube Length 16.0 406 17.0 432 20.0 508
BB Drop 1.6 40 1.6 40 1.6 40
Wheelbase 58.3 1480 59.5 1512 60.6 1539
Chainstay Length 32.3 821 32.3 821 32.3 821
Top Tube Length, Actual 22.6 574.1 23.4 594.4 24.3 618.1
Top Tube Length, Effective 23.2 590 24.4 620 25.4 645
Seat Tube Angle 72.5° 72.5° 72.5°
Standover Height 28.5 723 30.4 771 32.3 821
Stem Length 60 70 80
Stem Angle
Handlebar Width 740 740 740
Crank Length 175 175 175
Fork Length 16.5 420 16.5 420 16.5 420
Fork Rake 1.7 43 1.7 43 1.7 43

*Measured at the center of the TT and based on a wheel diameter of 678mm

Frame Construction

4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded

Fork Construction

4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated

Rear Dropout Configuration

Big Dummy Style. 10 x 135mm

Rear Hub Spacing

10 x 135mm

Front Hub Spacing

10 x 100mm

Rear Brake Compatibility

Disc - 51mm I.S. (203mm max rotor)

Front Brake Compatibility

Disc - 51mm I.S. (203mm max rotor)

Head Tube


Steerer Tube

Ø28.6mm (1-1/8")

Crown Race Diameter

Ø30mm (1-1/8")

Stock Headset Upper (S.H.I.S.)


Stock Headset Lower (S.H.I.S.)


Seat Collar


Seatpost Diameter


Front Derailleur (Clamp)


Max Chainring (CL)[3]

No frame limitations

Bottom Bracket

Bosch Mid Drive Mounting Node

Tire Clearance Frame [1][2]

26 x 2.5" (w/ or w/o fenders)

Tire Clearance Fork [1]

26 x 3.0"" (w/o fenders)
26 x 2.8"" (w/ fenders)

Rigid Fork Spec

420 x 43mm

Max Suspension Fork Length [4]


Bottle Mounts Frame

3 Standard

Bottle Mounts Fork

4 Three-Pack

Rack Mounts Frame

Yes (Surly Dummy Rails)

Rack Mounts Fork

Yes (upper, lower, and mid-blade threaded)

Fender Mounts Frame


Fender Mounts Fork


Other Features

Kickstand plate
Dedicated Rohloff cable routing and mount for OEM 2 axle plate
Internal dropper post routing compatible
Dual Bosch PowerPack Battery Mounts

[1]  Different tire and rim combinations will result in different clearances.  
[2]  Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.
[3]  Listed chainring clearance is worst case scenario. Clearances vary widely depending on components and configurations.
[4]  Suspension fork length listed at full extension (not at sag) 

FAQ & Reviews


Frame Warranty


This Surly product is warranted against defects in materials and workmanship for three years from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.

This warranty does NOT cover the following:

  • Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
  • Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
  • Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
  • Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
  • Normal wear and tear
  • Labor required to remove and/or refit and re-adjust the product within the bicycle assembly

This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.

This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.