Surly Ogre

Name: Surly Ogre
Brand: Surly

2025 RoadGravel Manufacturer page

Last known price: $1,899

Prices shown first for United States
Suspension: Rigid
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 155–170
MD 165–180
LG 175–191
XL 185–201

Components

16 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

100% Surly Chromoly Steel, Natch tubing, double-butted main triangle, TIG welded, E.D. coated Not identified

Suspension

1 part

Fork
- Surly

Drivetrain

7 parts

Bottom bracket

73mm threaded (1.37" x 24TPI) Not identified
Cassette
- Shimano Deore CS-M6100 12 speeds 10–51t
CS-M6100
Chain
- KMC
Crankset
- Shimano FC-MT511 12 speeds 30t
FC-MT511
Front derailleur

None
Rear derailleur
- Shimano Deore RD-M6100-SGS 12 speeds
RD-M6100-SGS
Shifters
- Shimano Deore SL-M6100 12 speeds
SL-M6100

Brakes

3 parts

Brake levers
- Tektro
HD-M275HD-M3120
Brakes
- Tektro
HD-M275HD-M3120
Disc rotors

Disc - 51mm I.S. (160mm max rotor) Not identified

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar
- Salsa
Headset
- Cane Creek Forty
Saddle
- WTB Volt
Seatpost

Ø27.2mm Not identified
Stem
- ProMax
DA-296

Sizes and geometry

4 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 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	395.5	410.5	427.6	447
Stackmm	592	603.4	613	632
Top tube lengthmm	575	595	615	640
Seat tube lengthmm	406.4	457.2	508	558
Head tube lengthmm	110	120	130	150
Head tube angle	71.5°	72°	72°	72°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1049.4	1064.5	1084.6	1110
Front centermm	618	633	653	679
Bottom bracket dropmm	68	68	68	68
Bottom bracket heightmm	311	311	311	311
Standover heightmm	763.5	795.7	824.5	857.85
Fork rakemm	45	45	45	45
Trailmm	72	68	68	68
Stack/reach ratio	1.50	1.47	1.43	1.41
Suspension and parts
Crank lengthmm	165	170	170	170
Handlebar widthmm	700	740	740	740
Stem lengthmm	70	80	90	100

Not published by the manufacturer: Front travel, Rear travel, 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: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 17.1 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

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

Lowest gear

17.1 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

87.0 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.3 km/h

Total gear range 510%

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: 17.1–87.0 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 bicycles with this information, 76.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Changes since 2024

Changes since 2024
Specification	2024 Surly Ogre	This bicycle Surly Ogre
Frame
Bicycle weight	14.12 kg	Not informed
Drivetrain
Smallest chainring	32	30
Largest chainring	32	30
Rear sprockets	10	12
Smallest sprocket	11	10
Largest sprocket	48	51
Lowest gear	19.3 in	17.1 in
Highest gear	84.4 in	87.0 in
Other specifications
Tire clearance	Maximum tire width: 2.5″	Not informed
Bottom bracket standard	Not informed	BSA