Surly Ogre

Name: Surly Ogre
Brand: Surly

2018 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 27.5″, 29″
Drivetrain: 3 × 10 26–48t / 11–36t
Gear range: 604%
Frame: Steel
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

SM 158–171
SM 158–171
MD 168–180
MD 168–180
LG 178–189
LG 178–189
XL 186–199
XL 186–199

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 Ogre, Surly 4130 CroMoly steel. Main triangle double-butted. 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
CS-HG50HG-50
Chain
- KMC X10 10 speeds
Crankset
- Shimano FC-T551 26/36/48t
FC-T551
Front derailleur
- Shimano FD-M611-D
FD-M611
Rear derailleur
- Shimano Deore
RD-MT610-SGS
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

8 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 411mm

Stack 603mm

Wheelbase 1065mm

Head angle 72.0°

Seat angle 73.0°

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 8 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	395.5	395.5	410.5	410.5	427.6	427.6	447	447
Stackmm	592	592	603.4	603.4	613	613	632	632
Top tube lengthmm	575	575	595	595	615	615	640	640
Seat tube lengthmm	406.4	406.4	457.2	457.2	508	508	558	558
Head tube lengthmm	110	110	120	120	130	130	150	150
Head tube angle	71.5°	71.5°	72°	72°	72°	72°	72°	72°
Seat tube angle	73°	73°	73°	73°	73°	73°	73°	73°
Chainstay lengthmm	440	440	440	440	440	440	440	440
Wheelbasemm	1049.4	1049.4	1064.5	1064.5	1084.6	1084.6	1110	1110
Front centermm	618	618	633	633	653	653	679	679
Bottom bracket dropmm	68	68	68	68	68	68	68	68
Standover heightmm	763.5	763.5	795.7	795.7	824.5	824.5	857.85	857.85
Fork rakemm	43	43	43	43	43	43	43	43
Trailmm	66	72	62	68	62	68	62	68
Stack/reach ratio	1.50	1.50	1.47	1.47	1.43	1.43	1.41	1.41

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: 3
Smallest chainring: 26
Largest chainring: 48
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 20.9 in
Highest gear: 126.6 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: 2.5″
Tire width: 2.5″
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

20.9 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

126.6 gear inches

This value is within 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: 8.0 km/h
Highest gear: 48.5 km/h

Total gear range 604%

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: 20.9–126.6 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