Polygon Sierra Oosten 2021
2021 Urban
Estimate price |
519$
Weight | 13.8 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame aluminium -
Wheels 26" -
Groupset SunRace -
Suspension Rigid -
Drivetrain 1 × 8 -
Brakes Rim
Sizing
Recommended size guide.
SM/MD
155cm - 170cm
MD/LG
168cm - 180cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
6061 ALLOY FRAME - CRUISER BIKE SPECIFIC GEOMETRY
Suspension Fork
HI-TEN FORK - CRUISER/TREKKING SPECIFIC
Drivetrain
Rear Derailleur
SUNRACE - 8 SPEED
Shift Levers
SUNRACE 8 SPEED
Cassette
SUNRACE ;8 SPEED
Crank
CYCLONE 38T 170MM
Bottom Bracket
CARTRIDGE BB
Chain
KMC Z7
Pedals
PLASTIC PEDAL W/ REFLECTOR
Wheels
Front Hub
FORMULA ALLOY HUB
Rear Hub
FORMULA ALLOY HUB - 8 SPEED
Rims
DOUBLE WALL 26inch/ 700c RIMS
Spokes
STAINLESS STEEL - 36 SPOKES PER WHEEL
Tires
DELI 26 x 35c
Brakes
Brakes
ALLOY V-BRAKES
Brake Levers
ALLOY BRAKE LEVER
Cockpit
Stem
POLYGON ALLOY, BAR:25.4, RISE:30 DEGREES
Handlebar
POLYGON ALLOY 640mm WIDE / RISE:112mm / SWEPT:50 DEGREES
Headset
THREADED HEADSET 1 INCH (25.4mm)
Seat
Saddle
SELLE ROYAL ONDINA
Seatpost
POLYGON ALLOY 27.2MM / 250MM
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM/MD | MD/LG |
|---|---|---|
| Stack Reach Ratio | 1.46 mm | 1.44 mm |
| Bottom Bracket Height | 298 mm | 298 mm |
| Front Center | 606 mm | 626 mm |
| Rake | 46 mm | 45 mm |
| Trail | 85 mm | 86 mm |
| Stack | 542 mm | 556 mm |
| Reach | 370 mm | 385 mm |
| Top Tube Length | 566 mm | 586 mm |
| Seat Tube Angle | 70 ° | 70 ° |
| Seat Tube Length | 406 mm | 445 mm |
| Head Tube Angle | 69 ° | 69 ° |
| Head Tube Length | 140 mm | 155 mm |
| Chainstay Length | 454 mm | 454 mm |
| Wheelbase | 1057 mm | 1077 mm |
| Bottom Bracket Drop | 37 mm | 37 mm |
| Standover Height | 478 mm | 482 mm |
| Wheels | 700 | 700 |
| Rider Min Height | 155 cm | 168 cm |
| Rider Max Height | 170 cm | 180 cm |
Model Overview
Sierra Oosten completes the Polygon Sierra model. 19 bikes variations carry this model name so far. Check out the entire range from 2021 of this model, by clicking this link.
Model range prices
Polygon Sierra Oosten 26 2021 is the most affordable bike of this model and has a price of 449$. On the other hand, Polygon SIERRA DELUXE SPORT Gent/Lady 2021, is the most expensive and costs 619$.
Safety
When cycling always take safety very seriously. Wear a helmet, obey the traffic rules and wear hi-vis clothes. In short, take care of yourself so others can take care of you.
Comfort bikes average price
If you want an acceptable Comfort bike you should know that the average price is 360$. However, this doesn’t mean that if you spend less money on a Comfort bike, you couldn’t get a decent one. To sum up, when you purchase your bike, make sure to check if it has reviews, and also do some components research.
This bike was released in 2021 and its price was 519$. If we compare this with the average Comfort bike cost we notice that the price is 44.17% higher.
Comfort bikes average weight
Comfort bikes weigh an average of 15.11 kg (33.31 lbs). An easier bike will give you a big advantage in climbs. However, a heavier bike can gain speed when you descend.
Sierra Oosten weighs 13.8 kg (30.42 lbs) and is a bit lighter than the average. To sum up, it’s 9.49% lighter than the average weight of Comfort bikes.
Sierra Oosten components
Fork material
When it comes to the fork, this bike has a steel one, so, it can add some extra weight to your bike. However, steel is a pretty tough and durable material.
Wheels
The Sierra Oosten 2021 bike is equipped with 26″ aluminum wheels when leaving the factory. These wheels give you great handling over your bike. However, they are less forgiving when riding over obstacles such as bumps and roots.
Brakes
When you want to stop the bike in time, the brakes are vital. The Sierra Oosten has Rim brakes. Slightly lighter than hydraulic brakes, rim brakes are a budget choice. However, they are not nearly as effective as hydraulic brakes are.
Sizes
There are 2 sizes available for this model. Rider height can be anywhere between 155 cm – 180 cm (5.09 ft – 5.91 ft). In short, it won’t be difficult to find the right one for you.