Surly Steamroller

Name: Surly Steamroller
Brand: Surly

2018 UrbanHipster Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 1 45t / 18t
Gear range: 100%
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

49cm
53cm
56cm
59cm
62cm

The manufacturer did not publish rider heights for these sizes.

Components

11 of 17 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 Steamroller 100% 4130 CroMoly steel. Double-butted main triangle . TIG-welded. ED Coated Not identified

Suspension

1 part

Fork

4130 CroMoly, lugged and brazed flat crown that is drilled to accept a standard-reach (47–57mm) caliper brake. It has clearance for 700c x 38mm tires. There are no eyelets at the dropouts Not identified

Drivetrain

7 parts

Bottom bracket

68mm wide, threaded English 1.37˝ x 24t Not identified
Cassette

Lida, 18t 3/32" Not identified
Chain
- KMC
Crankset
- Samox 45t
Front derailleur

None
Rear derailleur

None
Shifters

None

Brakes

2 parts

Brake levers
- Tektro CL520-RS
CL-520-RS
Brakes
- Tektro

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar

Dimension Arc Not identified
Headset
- Cane Creek
Saddle
- WTB Volt
Seatpost
- ProMax
SP-2010
Stem

HL 25.4 Not identified

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 56cm

Table

Reach 402mm

Stack 559mm

Wheelbase 979mm

Head angle 73.5°

Seat angle 73.5°

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 Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	388.1	394	402.3	408.2	420.6
Stackmm	504.9	531.3	558.8	586.4	618.1
Top tube lengthmm	529.5	547	568	587	608
Seat tube lengthmm	490	530	560	590	620
Head tube lengthmm	83	109	136	163	196
Head tube angle	72.5°	73°	73.5°	74°	74°
Seat tube angle	74.5°	74°	73.5°	73°	73°
Chainstay lengthmm	398	398	398	398	398
Wheelbasemm	965.7	966.6	978.6	988.1	1009.1
Front centermm	578	579	591	600	621
Bottom bracket dropmm	70	70	70	70	70
Standover heightmm	748.5	780.5	807.9	835.2	865.3
Fork rakemm	38	38	38	38	38
Trailmm	62	67	64	61	61
Stack/reach ratio	1.30	1.35	1.39	1.44	1.47

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: 1
Smallest chainring: 45
Largest chainring: 45
Rear sprockets: 1
Smallest sprocket: 18
Largest sprocket: 18
Lowest gear: 72.5 in
Highest gear: 72.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 38c; Additional specification: Wheel kind: 700
Tire width: 32c
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 700c

Gearing

Estimated speeds at 80 rpm

Lowest gear: 27.8 km/h
Highest gear: 27.8 km/h

Total gear range 100%

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.