Polygon Sierra DS Lady

2023 UrbanFitness Manufacturer page

Last known price: $619

Prices shown first for United States
Fork travel: 63 mm
Wheels: 700c
Gear range: 343%
Weight: 13.6 kg 30.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

SM 150–161
MD 159–170

Components

9 of 16 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

aluminum Not identified

Suspension

2 parts

Fork
- SR Suntour NEX
Rear shock

None

Drivetrain

6 parts

Bottom bracket

CARTRIDGE BEARING Not identified
Cassette
- Shimano MF-TZ21 14–28t
MF-TZ21
Chain
- KMC
Z-51RB
Crankset
- Shimano Tourney FC-TY501 8 speeds
FC-TY501
Rear derailleur
- Shimano Altus RD-M310
RD-M310
Shifters
- Shimano ST-EF41
ST-EF41

Brakes

1 part

Brakes

ALLOY V-BRAKE Not identified

Wheels and tires

2 parts

Rims

ARAYA TX-733 RIMS WITH ALLOY HUB Not identified

TX-733
Tires
- Schwalbe

Cockpit and contact points

5 parts

Handlebar

ALLOY, 680MM Not identified
Headset

INTERNAL THREADED ID:44MM Not identified
Pedals
- Feimin
FP-980
Saddle
- Selle Royal
Seatpost

ALLOY, 27.2X350MM Not identified

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 389mm

Stack 610mm

Wheelbase 1107mm

Head angle 69.0°

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 Reported by the manufacturer

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	389.4	409.4
Stackmm	610	610
Top tube lengthmm	370	390
Seat tube lengthmm	430	480
Head tube lengthmm	135	135
Head tube angle	69°	69°
Seat tube angle	73.5°	73.5°
Chainstay lengthmm	460	460
Wheelbasemm	1106.5	1126.5
Front centermm	651	671
Bottom bracket dropmm	50	50
Bottom bracket heightmm	304	304
Standover heightmm	450	450
Fork rakemm	42	42
Trailmm	99	99
Stack/reach ratio	1.57	1.49

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: womens
Frame material: Aluminum
Bicycle weight: 13.6 kg

30.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 29.0 in
Highest gear: 99.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 40c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

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

Lowest gear

29.0 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2023
Sample: 289 bicycles with this information
Coverage: 86.0% of the class

Highest gear

99.4 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2023
Sample: 289 bicycles with this information
Coverage: 86.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 38.1 km/h

Total gear range 343%

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: 29.0–99.4 gear inches
Class reference (p10–p90): 22.0–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2023
Lowest gear: 289 bicycles with this information, 86.0% of the class
Highest gear: 289 bicycles with this information, 86.0% 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 2023 builds
Specification	This bicycle Polygon Sierra DS Lady	Polygon Sierra Deluxe Sport	Polygon Sierra DS Gent	Polygon Sierra Oosten	Polygon Sierra OOSTEN26
Frame
Intended fit	womens	Unisex	Unisex	Unisex	Unisex
Bicycle weight	13.6 kg	16.4 kg	13.6 kg	14.2 kg	13.6 kg
Fork material	Not informed	Not informed	Not informed	Steel	Steel
Suspension
Suspension configuration	Hardtail	Hardtail	Hardtail	Rigid	Rigid
Front travel	63 mm	63 mm	63 mm	Not informed	Not informed
Drivetrain
Front chainrings	3	3	3	1	1
Smallest chainring	28	28	28	36	36
Largest chainring	48	48	48	36	36
Smallest sprocket	14	14	14	11	11
Largest sprocket	28	28	28	32	32
Lowest gear	29.0 in	29.0 in	29.0 in	32.6 in	29.3 in
Highest gear	99.4 in	99.4 in	99.4 in	94.9 in	85.1 in
Rear sprockets	Not informed	Not informed	Not informed	8	8
Other specifications
Fork spring	Coil	Coil	Coil	Not informed	Not informed
Suspension	Hardtail	Hardtail	Hardtail	Rigid	Rigid
Tire width	40c	40c	40c	35c	Not informed
Wheel size	700c	700c	700c	700c	26″