Surly ECR

Name: Surly ECR
Brand: Surly

2017 RoadGravel

Suspension: Rigid
Wheels: 29″
Drivetrain: 2 × 10 22–36t / 11–36t
Gear range: 536%
Frame: Steel
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

XS 158–167
SM 165–173
MD 169–180
LG 177–186
XL 183–191
XXL 186–194

Components

17 of 21 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 ECR, 100% Surly 4130 CroMoly steel. ED coated. Double-butted main triangle. TIG-welded Not identified

Suspension

1 part

Fork
- Surly

Drivetrain

7 parts

Bottom bracket

73mm shell width, threaded standard English (1.37˝ x 24t) Not identified
Cassette
- Shimano CS-HG50-10 10 speeds
CS-HG50-10
Chain
- KMC X10 10 speeds
Crankset
- Surly 22/36t
Front derailleur
- Shimano FD-M676-D
FD-M676FD-M676D
Rear derailleur
- Shimano RD-T670
RD-T670
Shifters
- microSHIFT Thumb Shifters MTB 2/3×10 10 speeds
SL-M10

Brakes

2 parts

Brake levers
- SRAM FR-5
FR-5
Brakes
- Avid

Wheels and tires

5 parts

Cockpit and contact points

5 parts

Handlebar

Jones Loop, 710mm. Anodized. Black Not identified
Headset
- Cane Creek Forty
Saddle

Velo VL2155, Steel rail Not identified
Seatpost
- Kalloy
SP-342
Stem
- Kalloy
AS-025N

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 416mm

Stack 606mm

Wheelbase 1107mm

Head angle 69.5°

Seat angle 72.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	384.2	398.5	416.1	433.8	436.7	447.6
Stackmm	591.5	596.2	605.5	614.9	628.9	643
Top tube lengthmm	560	575	595	615	630	645
Seat tube lengthmm	356.5	406.4	457.2	508	558.8	609.6
Head tube lengthmm	85	90	100	110	125	140
Head tube angle	69.5°	69.5°	69.5°	69.5°	69.5°	69.5°
Seat tube angle	72.5°	72.5°	72.5°	72.5°	72.5°	72.5°
Chainstay lengthmm	451	451	451	451	451	451
Wheelbasemm	1069.5	1085.5	1106.6	1127.8	1136	1152.2
Front centermm	631	647	668	689	697	713
Bottom bracket dropmm	80	80	80	80	80	80
Standover heightmm	717.6	753.4	789	822.7	855.7	889
Fork rakemm	47	47	47	47	47	47
Trailmm	80	80	80	80	80	80
Stack/reach ratio	1.54	1.50	1.46	1.42	1.44	1.44

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel
Frame weight: 1.15 kg

2.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 17.7 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 3″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

17.7 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2017
Sample: 88 bicycles with this information
Coverage: 96.7% of the class

Highest gear

94.9 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2017
Sample: 88 bicycles with this information
Coverage: 96.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 36.4 km/h

Total gear range 536%

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.

This bicycle: 17.7–94.9 gear inches
Class reference (p10–p90): 24.9–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2017
Lowest gear: 88 bicycles with this information, 96.7% of the class
Highest gear: 88 bicycles with this information, 96.7% of the class