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2021 Polygon

Sierra Oosten

A 700c aluminum frame comfort bike with modest components and rim brakes.
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Manufacturer Price

$699
Weight14.2 kg  
FrameAluminum
SuspensionRigid
ForkSteel
Wheels700c Aluminum
Drivetrain1 × 8
GroupsetTourney, Altus
BrakesRim
Where to Buy
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

45 km/h

Sierra Oosten

47 km/h

Similar Bikes

Highest gear

(descending)

Sizing
SM/MD

155cm – 170cm

MD/LG

168cm – 180cm

Rider Fit Notes

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Geometry
Specs
Build
Frame

AL6 City Frame, Cruiser Specific Geometry, 6061 Alloy

Fork

Hi-Ten Rigid Fork - Cruiser/Trekking Specific,Straight 1-1/8" Threaded

Bottom Bracket

Cartridge Bearing, 68x122mm Square

Headset

External Cup Threaded, S.H.I.S. EC 34/28.6 | 34/30

Stem

Polygon Alloy, Length: 80mm, Quill: 180mm, Bar: 25.4mm, Rise: 30 Degree

Handlebar

Polygon Alloy, Width: 620mm (S/M), 640mm (M/L), Rise: 112mm, Swept: 50 Degree, 25.4mm

Saddle

Selle Royal Ondina

Seatpost

Polygon Alloy, 27.2x250mm, 15mm Offset

TypeRigid

Pedals

Nylon Platform

Groupset
Rear Derailleur

Shimano Altus RD-M310 8-Speed

Crank

Steel 36T, 165mm (S/M), 170mm (M/L)

Shifters

Shimano SL-RS45-8R Revoshift 8-Speed

Cassette

Shimano Altus CS-HG31, 8-Speed 11-32T

Chain

KMC Z-8.3 8-Speed

Brakes

Alloy V-Brakes

TypeRim

Brake Levers

Alloy Brake Lever

Wheels
Rims

Double Wall Alloy

Spokes

Stainless Steel - 36 Spokes

Front Hub

Formula Alloy 36H

Rear Hub

Formula Alloy 36H

Tires

DELI 26 x 1-3/8" / 700 x 35C

Accessories
Fenders

Alloy Front & Back

Racks

25kg Weight limit

Rider Notes
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First added 23 September

Last updated 15 July

Not listed for 1,063 days