Polygon Sierra OOSTEN26

2024 UrbanComfort Manufacturer page

Last known price: $519

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 8 36t / 11–32t
Gear range: 291%
Weight: 13.6 kg 30.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

MD 160–171
LG 169–180

Components

5 of 15 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

HI-TEN STEEL RIGID FORK Not identified
Rear shock

None

Drivetrain

6 parts

Bottom bracket

CARTRIDGE BB Not identified
Cassette
- Shimano CS-HG31 8 speeds 11–32t
CS-HG31
Chain
- KMC Z7 7 speeds
Z-7
Crankset

STEEL CRANK 36T, 165MM Not identified
Rear derailleur
- Shimano Altus RD-M310
RD-M310
Shifters
- Shimano SL-RS47
SL-RS47

Brakes

1 part

Brakes

ALLOY V-BRAKE Not identified

Wheels and tires

2 parts

Rims

ALLOY DOUBLE WALL RIMS ALLOY HUB 36H Not identified
Tires

DELI S-151, 26X1-3/8 Not identified

S-151

Cockpit and contact points

5 parts

Handlebar

ALLOY, 620MM Not identified
Headset

EXTERNAL THREADED Not identified
Pedals

None
Saddle
- Selle Royal Ondina
Seatpost

ALLOY, 27.2X250MM Not identified

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

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 26″ 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	480	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	77	77
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: Unisex
Frame material: Aluminum
Fork material: Steel
Bicycle weight: 13.6 kg

30.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 29.3 in
Highest gear: 85.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.2 km/h
Highest gear: 32.6 km/h

Total gear range 291%

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: 29.3–85.1 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 2024 builds
Specification	This bicycle Polygon Sierra OOSTEN26	Polygon Sierra Deluxe Sport	Polygon Sierra DS Gent	Polygon Sierra DS Lady	Polygon Sierra Oosten
Frame
Intended fit	Unisex	Unisex	Unisex	womens	Unisex
Fork material	Steel	Not informed	Not informed	Not informed	Steel
Bicycle weight	13.6 kg	Not informed	13.6 kg	13.6 kg	14.2 kg
Suspension
Suspension configuration	Rigid	Hardtail	Hardtail	Hardtail	Rigid
Front travel	Not informed	63 mm	63 mm	63 mm	Not informed
Drivetrain
Front chainrings	1	3	3	3	1
Smallest chainring	36	28	28	28	36
Largest chainring	36	48	48	48	36
Rear sprockets	8	Not informed	Not informed	Not informed	8
Smallest sprocket	11	14	14	14	11
Largest sprocket	32	28	28	28	32
Lowest gear	29.3 in	29.0 in	29.0 in	29.0 in	32.6 in
Highest gear	85.1 in	99.4 in	99.4 in	99.4 in	94.9 in
Other specifications
Suspension	Rigid	Hardtail	Hardtail	Hardtail	Rigid
Wheel size	26″	700c	700c	700c	700c
Fork spring	Not informed	Coil	Coil	Coil	Not informed
Tire width	Not informed	40c	40c	40c	35c