Surly Preamble Flat Bar

Name: Surly Preamble Flat Bar
Brand: Surly

2025 UrbanCommuter Manufacturer page

Last known price: $1,099

Prices shown first for United States
Suspension: Rigid
Wheels: 650b, 700c
Drivetrain: 1 × 9 40t / 11–41t
Gear range: 373%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 152.4–165.1
SM 162.6–172.7
MD 170.2–182.9
LG 180.3–190.5
XL 188–200.7

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 Preamble, 100% Chromoly steel tubing, E.D. coated Not identified

Suspension

1 part

Fork
- Surly

Drivetrain

7 parts

Bottom bracket

68mm BSA, threaded Not identified
Cassette
- Shimano CS-LG300 11–41t
CS-LG300
Chain
- Shimano CN-LG500
CN-LG500
Crankset
- Shimano Cues FC-U4000-1 11 speeds 40t
FC-U4000
Front derailleur

None
Rear derailleur
- Shimano Cues RD-U4000 9 speeds
RD-U4000
Shifters
- Shimano Cues SL-U4000
SL-U4000

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. (180mm max rotor) Not identified

Wheels and tires

4 parts

Front hub
- Shimano HB-MT200
HB-MT200
Rear hub
- Shimano FH-MT200-B
FH-MT200
Rims
- Shining
DB-21
Tires

Front: XS-SM: MSW Hybrid 650b x 35mm, MD-XL: MSW Hybrid 700c x 35mm, Rear: XS-SM: MSW Hybrid 650b x 35mm, MD-XL: MSW Hybrid 700c x 35mm Not identified

Cockpit and contact points

5 parts

Handlebar
- Kalloy
Headset
- VP
Saddle
- Selle Italia
Seatpost

Ø27.2mm Not identified
Stem
- Kalloy

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 391mm

Stack 567mm

Wheelbase 1030mm

Head angle 72.0°

Seat angle 72.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c 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	352	381	391	404	421
Stackmm	517	535	567	605	643
Top tube lengthmm	500	545	570	600	630
Seat tube lengthmm	410	505	565	605	645
Head tube lengthmm	120	135	130	170	210
Head tube angle	70°	71°	72°	72°	72°
Seat tube angle	74°	73°	72.5°	72°	72°
Chainstay lengthmm	420	420	435	435	435
Wheelbasemm	987	1013	1030	1055	1085
Front centermm	573	599	604	629	658
Bottom bracket dropmm	54	54	66	66	66
Standover heightmm	722	776	826	863	901
Fork rakemm	47	47	44	44	44
Trailmm	70	64	67	67	67
Stack/reach ratio	1.47	1.40	1.45	1.50	1.53
Suspension and parts
Crank lengthmm	165	170	170	175	175
Handlebar widthmm	700	700	720	720	720
Stem lengthmm	80	90	90	100	100

Not published by the manufacturer: Bottom bracket height, 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: 40
Largest chainring: 40
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 41
Lowest gear: 28.3 in
Highest gear: 105.5 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: 35c
Wheel material: Aluminum
Wheel size: 650b, 700c

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.8 km/h
Highest gear: 40.4 km/h

Total gear range 373%

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: 28.3–105.5 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.

Differences across 2025 builds
Specification	This bicycle Surly Preamble Flat Bar	Surly Preamble Drop Bar
Drivetrain
Rear sprockets	9	10
Largest sprocket	41	48
Lowest gear	28.3 in	24.2 in

Changes since 2024
Specification	2024 Surly Preamble Flat Bar	This bicycle Surly Preamble Flat Bar
Frame
Bicycle weight	12.25 kg	Not informed
Drivetrain
Lowest gear	26.8 in	28.3 in
Highest gear	100.0 in	105.5 in
Other specifications
Wheel size	650b	650b / 700c
Bottom bracket standard	Not informed	BSA