Surly Sorceress Eagle 90

Name: Surly Sorceress Eagle 90
Brand: Surly

2026 MountainTrail Manufacturer page

Last known price: $3,199

Prices shown first for United States
Fork travel: 140 mm
Wheels: 27.5″, 29″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 146–159
SM 156–169
MD 166–179
LG 177–189
XL 187–199

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

Sorceress - 100% Surly Chromoly steel, Natch tubing, double-butted main triangle, trumpet flared tubes, TIG welded, E.D. coated. Includes Silicone chainstay protector, 1mm thick. Not identified

Suspension

1 part

Fork
- RockShox Psylo Gold RC

Drivetrain

7 parts

Bottom bracket

73mm threaded (1.37" x 24TPI) Not identified
Cassette
- SRAM XS-1270 Eagle Transmission 12 speeds 10–52t
XS-1270
Chain
- SRAM Eagle 70 Transmission Flattop 12 speeds
Crankset
- SRAM Eagle 90 Transmission 12 speeds 32t
Front derailleur

None
Rear derailleur
- SRAM Eagle 90 Transmission 12 speeds
Shifters
- SRAM

Brakes

3 parts

Brake levers
- SRAM DB6
Brakes
- SRAM DB6
Disc rotors

Disc - 51mm I.S. (203mm max rotor) Not identified

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 463mm

Stack 618mm

Wheelbase 1193mm

Head angle 65.0°

Seat angle 76.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	415	437	463	484	507
Stackmm	580	614	618	646	673
Top tube lengthmm	560	590	617	645	675
Seat tube lengthmm	300	330	360	410	460
Head tube lengthmm	95	95	100	130	160
Head tube angle	64°	65°	65°	65°	65°
Seat tube angle	76°	76°	76°	76°	76°
Chainstay lengthmm	410	429	429	429	429
Wheelbasemm	1127	1166	1193	1227	1263
Front centermm	723	745	772	806	841
Bottom bracket dropmm	55	65	65	65	65
Bottom bracket heightmm	303	314	314	314	314
Standover heightmm	730	763	782	796	809
Fork rakemm	44	44	44	44	44
Trailmm	123	126	126	126	126
Stack/reach ratio	1.40	1.41	1.34	1.34	1.33
Suspension and parts
Crank lengthmm	160	160	165	165	170
Handlebar widthmm	740	740	800	800	800
Stem lengthmm	45	45	45	45	45

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

Suspension

Suspension configuration: Hardtail
Front travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 17.9 in
Highest gear: 92.8 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: 27.5″, 29″

Technical analysis

4 measures

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

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,640 bicycles with this information
Coverage: 96.3% of the class

Lowest gear

17.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Shifting

Mechanical

388 of 1,702 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,702 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 35.5 km/h

Total gear range 520%

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: 17.9–92.8 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2026
Lowest gear: 1227 bicycles with this information, 72.0% of the class
Highest gear: 1227 bicycles with this information, 72.0% 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.

Differences across 2026 builds

Differences across 2026 builds
Specification	This bicycle Surly Sorceress Eagle 90	Surly Sorceress Deore 12	Surly Sorceress Single Speed
Drivetrain
Rear sprockets	12	12	1
Smallest sprocket	10	10	18
Largest sprocket	52	51	18
Lowest gear	17.9 in	18.2 in	51.6 in
Highest gear	92.8 in	92.8 in	51.6 in
Cockpit
Shifting	Mechanical	Mechanical	No shifting