Surly ECR 29+

Name: Surly ECR 29+
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

MD 165–177
MD 165–177
LG 175–188
LG 175–188
XL 185–198
XL 185–198

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 LG

Table

Reach 421mm

Stack 633mm

Wheelbase 1111mm

Head angle 70.0°

Seat angle 72.5°

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	408	408	420.5	420.5	433	433
Stackmm	609.5	609.5	633	633	656.5	656.5
Top tube lengthmm	600	600	620	620	640	640
Seat tube lengthmm	457.2	457.2	507.9	507.9	558.7	558.7
Head tube lengthmm	100	100	125	125	150	150
Head tube angle	70°	70°	70°	70°	70°	70°
Seat tube angle	72.5°	72.5°	72.5°	72.5°	72.5°	72.5°
Chainstay lengthmm	451	451	451	451	451	451
Wheelbasemm	1090	1090	1111	1111	1132.5	1132.5
Front centermm	651	651	672	672	693	693
Bottom bracket dropmm	80	80	80	80	80	80
Standover heightmm	805	805	840	840	875	875
Fork rakemm	43	43	43	43	43	43
Trailmm	74	81	74	81	74	81
Stack/reach ratio	1.49	1.49	1.51	1.51	1.52	1.52

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