Surly Big Easy

Name: Surly Big Easy
Brand: Surly

2025 UrbanUtilityLong-tail cargo Electric bicycle Manufacturer page

Last known price: $5,499

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 9 38t / 11–46t
Gear range: 418%
Battery: 725 Wh
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 140–170
MD 157–184
LG 170–194

Components

16 of 23 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Surly Big Easy 2.0 Not identified

Electric system

3 parts

Battery

725Wh Not identified
Charger

Yes Not identified
Motor
- Bosch

Suspension

1 part

Fork
- Surly

Drivetrain

6 parts

Cassette
- Shimano CS-LG400-11 11 speeds 11–46t
CS-LG400-11
Chain
- KMC
Crankset
- FSA 38t
CK-763
Front derailleur

None
Rear derailleur
- Shimano Cues RD-U4000 9 speeds
RD-U4000
Shifters
- Shimano Cues SL-U4000
SL-U4000

Brakes

3 parts

Brake levers
- Tektro HD-T740
HD-T740
Brakes
- Tektro HD-T740
HD-T740
Disc rotors

51mm I.S. (160-203mm) Not identified

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar
- Surly
Headset
- Cane Creek
Saddle
- WTB Volt
Seatpost

Ø30.9mm Not identified
Stem

Sunday Freeze Top Load 48mm Not identified

Other components

1 part

Lights

No Not identified

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 422mm

Stack 595mm

Wheelbase 1525mm

Head angle 68.0°

Seat angle 72.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	396	422	449
Stackmm	553	595	637
Top tube lengthmm	570	610	650
Seat tube lengthmm	410	450	500
Head tube lengthmm	130	175	220
Head tube angle	68°	68°	68°
Seat tube angle	72.5°	72.5°	72.5°
Chainstay lengthmm	830	830	830
Wheelbasemm	1481	1525	1569
Front centermm	654	698	742
Bottom bracket dropmm	50	50	50
Standover heightmm	693	720	748
Fork rakemm	50	50	50
Trailmm	75	74	74
Stack/reach ratio	1.40	1.41	1.42
Suspension and parts
Crank lengthmm	170	175	175
Handlebar widthmm	820	820	820
Stem lengthmm	48	48	48

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 21.5 in
Highest gear: 89.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 725 Wh

Additional specifications

Battery: 725Wh
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.2 km/h
Highest gear: 34.4 km/h

Total gear range 418%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.