Surly Lowside

Name: Surly Lowside
Brand: Surly

2020 UrbanHipster

Last known price: $1,250

Prices shown first for United States
Suspension: Rigid
Wheels: 26″, 650b
Drivetrain: 1 × 1 32t / 17t
Gear range: 100%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 142+
XS 142+
SM 152+
SM 152+
MD 165+
MD 165+
LG 175+
LG 175+
XL 185+
XL 185+

Components

15 of 18 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 Lowside Frame, 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated Not identified

Suspension

1 part

Fork
- Surly

Drivetrain

7 parts

Bottom bracket
- SRAM
Cassette
- Surly
Chain
- KMC X10 10 speeds
Crankset
- SRAM NX 32t
Front derailleur

None
Rear derailleur

None
Shifters

None

Brakes

3 parts

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

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar
- Surly
Headset
- Cane Creek
Saddle
- WTB Volt
Seatpost

2 Bolt, 30.9mm, 400mm Not identified
Stem

Sunday Freeze top load 22.2mm clamp Not identified

Sizes and geometry

10 sizes Open in the geometry plotter

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

Size MD

Table

Reach 420mm

Stack 594mm

Wheelbase 1120mm

Head angle 67.5°

Seat angle 71.5°

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 10 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	388	388	403.7	403.7	419.5	419.5	435.5	435.5	451	451
Stackmm	564.5	564.5	579.8	579.8	593.5	593.5	608	608	622	622
Top tube lengthmm	578	578	598	598	618	618	638	638	658	658
Seat tube lengthmm	316	316	366	366	416	416	466	466	516	516
Head tube lengthmm	110	110	125	125	140	140	155	155	170	170
Head tube angle	67.3°	67.3°	67.4°	67.4°	67.5°	67.5°	67.5°	67.5°	67.6°	67.6°
Seat tube angle	71.4°	71.4°	71.4°	71.4°	71.5°	71.5°	71.5°	71.5°	71.6°	71.6°
Chainstay lengthmm	425	425	425	425	425	425	425	425	425	425
Wheelbasemm	1077	1077	1098	1098	1119.5	1119.5	1140.5	1140.5	1161.5	1161.5
Front centermm	654	654	675	675	697	697	718	718	739	739
Bottom bracket dropmm	35.6	35.6	36	36	36.4	36.4	36.7	36.7	37	37
Standover heightmm	729	729	755	755	787	787	817	817	848.5	848.5
Fork rakemm	42	42	42	42	42	42	42	42	42	42
Trailmm	88	94	88	93	86	91	86	91	84	90
Stack/reach ratio	1.46	1.46	1.44	1.44	1.42	1.42	1.40	1.40	1.38	1.38
Suspension and parts
Crank lengthmm	170	170	170	170	175	175	175	175	175	175
Handlebar widthmm	820	820	820	820	820	820	820	820	820	820
Stem lengthmm	60	60	60	60	60	60	60	60	60	60
Stem angle	6°	6°	6°	6°	6°	6°	6°	6°	6°	6°

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, 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: 32
Largest chainring: 32
Rear sprockets: 1
Smallest sprocket: 17
Largest sprocket: 17
Lowest gear: 51.8 in
Highest gear: 51.8 in

Wheels and brakes

Wheel configuration: Wheel options
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 3″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″, 650b

Gearing

Estimated speeds at 80 rpm

Lowest gear: 19.8 km/h
Highest gear: 19.8 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.

This bicycle: 51.8–51.8 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 2019

Changes since 2019
Specification	2019 Surly Lowside	This bicycle Surly Lowside
Drivetrain
Smallest sprocket	16	17
Largest sprocket	16	17
Lowest gear	55.0 in	51.8 in
Highest gear	55.0 in	51.8 in
Brakes
Brake type	Mechanical disc	Hydraulic disc
Other specifications
Tire clearance	Maximum tire width: 2.8″	Not informed