Surly Wednesday

Name: Surly Wednesday
Brand: Surly

2025 MountainFat bike Manufacturer page

Last known price: $1,849

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 11 30t / 11–50t
Gear range: 455%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 145–160
SM 155–170
MD 165–180
LG 175–191
XL 185–201

Components

15 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 Wednesday, 100% Surly 4130 Chromoly steel. 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

100mm threaded (1.37" x 24TPI) Not identified
Cassette
- Shimano CS-LG400-11 11 speeds 11–50t
CS-LG400-11
Chain
- KMC
Crankset
- Samox 30t
Front derailleur

None
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

3 parts

Brake levers
- Tektro HD-M275 / HD-M276
HD-M275HD-M276
Brakes
- Tektro HD-M275 / HD-M276
HD-M275HD-M276
Disc rotors

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

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar

Velo Black Not identified
Headset
- FSA ORBIT ITA
Saddle
- WTB Volt
Seatpost

Ø30.9mm Not identified
Stem
- ProMax

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 436mm

Stack 587mm

Wheelbase 1122mm

Head angle 69.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ 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	400	420	436	453	471
Stackmm	573	578	587	597	606
Top tube lengthmm	570	590	610	630	650
Seat tube lengthmm	316	366	416	466	516
Head tube lengthmm	95	100	110	120	130
Head tube angle	69°	69°	69°	69°	69°
Seat tube angle	73.5°	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	435	435	435	435	435
Wheelbasemm	1081	1101	1122	1143	1164
Front centermm	652	672	693	714	735
Bottom bracket dropmm	55	55	55	55	55
Bottom bracket heightmm	288	288	288	288	288
Standover heightmm	711	737	774	807	841
Fork rakemm	47	47	47	47	47
Trailmm	81	83	81	81	81
Stack/reach ratio	1.43	1.38	1.35	1.32	1.29
Suspension and parts
Crank lengthmm	165	165	170	170	170
Handlebar widthmm	700	700	750	750	750
Stem lengthmm	60	60	70	70	80

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: 11
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 15.6 in
Highest gear: 70.9 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: 3.8″
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.0 km/h
Highest gear: 27.2 km/h

Total gear range 455%

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: 15.6–70.9 gear inches

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 Wednesday	This bicycle Surly Wednesday
Drivetrain
Rear sprockets	12	11
Other specifications
Tire clearance	Maximum tire width: 4.6″	Not informed
Travel	Configuration: RigidFront: Additional specification: Not available: Yes	Configuration: Rigid