Polygon Sierra Oosten 26

2020 UrbanComfort Manufacturer page

Last known price: $429

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

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

6 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

AL6 ALLOY FRAME Not identified

Suspension

2 parts

Fork

FEROTECH FORK Not identified
Rear shock

None

Drivetrain

6 parts

Bottom bracket

BB SET CH-52E Not identified

CH-52E
Cassette
- SunRace 11–32t
Chain
- KMC Z7 7 speeds
Z-7
Crankset

CYCLONE CTL2-101 Not identified
Rear derailleur
- Shimano Altus RD-M310-L
RD-M310
Shifters
- Shimano SL-RS47
SL-RS47S-RS47

Brakes

1 part

Brakes
- Alhonga

Wheels and tires

2 parts

Rims

ALLOY DOUBLE WALL RIMS W/ ALLOY HUBS Not identified
Tires

PERFORMANCE TIRE 26X1-3/8 (37-590) Not identified

Cockpit and contact points

5 parts

Handlebar

ALLOY HANDLE BAR Not identified
Pedals

PLASTIC PEDAL Not identified
Saddle
- Selle Royal Ondina
Seatpost

ALLOY SEATPOST 27.2X250MM Not identified
Stem

ALLOY HANDLE STEM Not identified

Sizes and geometry

2 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 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 Reach Stack

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
Bicycle weight: 13.6 kg

30.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

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

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 2020 builds
Specification	This bicycle Polygon Sierra Oosten 26	Polygon Sierra AX24	Polygon Sierra Deluxe Sport Gent/Lady
Frame
Intended fit	Unisex	Unisex	womens
Bicycle weight	13.6 kg	Not informed	13.6 kg
Suspension
Suspension configuration	Rigid	Rigid	Hardtail
Front travel	Not informed	Not informed	63 mm
Drivetrain
Rear sprockets	8	7	Not informed
Smallest sprocket	11	14	14
Largest sprocket	32	28	28
Front chainrings	Not informed	1	3
Smallest chainring	Not informed	36	28
Largest chainring	Not informed	36	48
Lowest gear	Not informed	30.9 in	29.0 in
Highest gear	Not informed	61.7 in	99.4 in
Other specifications
Suspension	Rigid	Rigid	Hardtail
Wheel size	26″	24″	700c
Tire width	Not informed	1.75″	40c
Fork spring	Not informed	Not informed	Coil