Surly ECR 27+

Name: Surly ECR 27+
Brand: Surly

2018 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 27.5″, 29″
Drivetrain: 2 × 10 26–39t / 11–40t
Gear range: 545%
Frame: Steel
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

XS 151–164
XS 151–164
SM 160–172
SM 160–172
MD 166–179
MD 166–179

Components

18 of 20 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
- SunRace 11–40t
Chain
- KMC X10 10 speeds
Crankset
- Surly 26/39t
Front derailleur
- Shimano SLX FD-M661
FD-M661
Rear derailleur
- Shimano RD-M615-SGS
RD-M615-SGSRD-M615
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

4 parts

Cockpit and contact points

5 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 398mm

Stack 580mm

Wheelbase 1074mm

Head angle 69.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ 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	385	385	398	398	410.5	410.5
Stackmm	556	556	579.5	579.5	603	603
Top tube lengthmm	555	555	575	575	595	595
Seat tube lengthmm	346.4	346.4	406.4	406.4	457.2	457.2
Head tube lengthmm	90	90	115	115	140	140
Head tube angle	69°	69°	69°	69°	69°	69°
Seat tube angle	73°	73°	73°	73°	73°	73°
Chainstay lengthmm	435	435	435	435	435	435
Wheelbasemm	1052.3	1052.3	1074	1074	1096	1096
Front centermm	624	624	646	646	668	668
Bottom bracket dropmm	60	60	60	60	60	60
Standover heightmm	726	726	766	766	802	802
Fork rakemm	43	43	43	43	43	43
Trailmm	81	88	81	88	81	88
Stack/reach ratio	1.44	1.44	1.46	1.46	1.47	1.47

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 26
Largest chainring: 39
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 40
Lowest gear: 18.9 in
Highest gear: 102.8 in

Wheels and brakes

Wheel configuration: Wheel options
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 3″
Tire width: 3″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

2 measures

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

Lowest gear

18.9 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2018
Sample: 204 bicycles with this information
Coverage: 99.0% of the class

Highest gear

102.8 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2018
Sample: 204 bicycles with this information
Coverage: 99.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 39.4 km/h

Total gear range 545%

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: 18.9–102.8 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: 2018
Lowest gear: 204 bicycles with this information, 99.0% of the class
Highest gear: 204 bicycles with this information, 99.0% of the class