Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 27.5" -
Travel Front 200mm -
Travel Rear 203mm -
Fork RockShox BoXXer
-
Groupset Zee -
Suspension Full -
Drivetrain 1 × 11 -
Brakes Hydraulic Disc
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Aluminum
Suspension Fork
RockShox Boxxer Team, coil spring, standard steerer
Rear Shock
RockShox Vivid R2C, 9.5" x 3.0"
Drivetrain
Rear Derailleur
Shimano Zee RD-M640-SS
Front Derailleur
N/A
Shift Levers
Shimano Zee SL-M640
Cassette
Shimano CS-5700, 11-25 tooth
Crank
Shimano Zee FC-M645, 165mm
Bottom Bracket
Shimano integraged BSA
Chain
Shimano Deore XT CN-HG95
Chain Guide
Yes
Pedals
N/A
Wheels
Front Hub
Novatec
Rear Hub
Novatec
Rims
Spank Spike Race28 DH Evo
Tires
Schwalbe Magic Mary, downhill specific, 27.5" x 2.50"
Brakes
Brakes
Shimano Zee BR-M640
Brake Levers
Shimano Zee BL-M640
Cockpit
Stem
Kore Torsion DM V2 M35, alloy, 30mm length
Handlebar
Kore Torsion M35, alloy, 800mm width
Headset
FSA No. 57E-1, taper ID: 44/65mm
Seat
Saddle
Entity Assault, Cr-Mo rails
Seatpost
Kore Aerox 3, alloy, 300mm length
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM High | MD High | LG High | XL High | XXL High |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.612 mm | 1.53 mm | 1.429 mm | 1.358 mm | 1.285 mm |
| Bottom Bracket Height | 353.7 mm | 353.6 mm | 353.5 mm | 353.3 mm | 353.2 mm |
| Stack | 599 mm | 599.2 mm | 599.5 mm | 599.6 mm | 599.9 mm |
| Reach | 371.5 mm | 391.6 mm | 419.5 mm | 441.6 mm | 466.8 mm |
| Top Tube Length | 538.9 mm | 559 mm | 586.8 mm | 608.9 mm | 634 mm |
| Seat Tube Angle | 62.2 ° | 62.2 ° | 62.2 ° | 62.2 ° | 62.2 ° |
| Seat Tube Length | 383 mm | 383 mm | 383 mm | 383 mm | 383 mm |
| Head Tube Angle | 62.2 ° | 62.2 ° | 62.2 ° | 62.2 ° | 62.2 ° |
| Head Tube Length | 110 mm | 110 mm | 110 mm | 110 mm | 110 mm |
| Bottom Bracket Drop | 2 mm | 2 mm | 2 mm | 2 mm | 2 mm |
| Standover Height | 671 mm | 671 mm | 669 mm | 668 mm | 668 mm |
| Wheels | 27" | 27" | 27" | 27" | 27" |
Model Overview
Collosus DH8 belongs to the Polygon Collosus model. There are 20 bikes that carry this model name. Check out the entire range from 2018 of this model, by clicking this link.
Safety
Your safety is a top priority so always wear a helmet when you ride your bike. Moreover, wear the right clothing. You want to be visible to other drivers, so avoid wearing dark clothing.
Average price for Downhill bikes
According to our calculations, the average cost of a Downhill bike that is reliable is 3391$. However, you could also get a good Downhill bike even if you pay a lower amount than the average price. To sum up, when you purchase your bike, make sure to check if it has reviews, and also do some components research.
Overview of components
Fork
Polygon Collosus DH8 2018 bike is equipped with the RockShox BoXXer fork, and has 200mm travel. Bike forks are great for shock absorption and provide you with a smooth ride. In short, you should always ensure you have a good fork when purchasing a bike.
Rear Shock
The Collosus DH8 has a rear shock with a travel of 203mm. The model RockShox Vivid R2C is the one installed in this bike. Rear shocks improve riding comfort and give you greater control over all terrains. To sum up, always consider getting a bike that has a rear shock as well.
Wheels
The wheels on Collosus DH8 are the 27.5″ aluminum type. 27.5″ wheels are a mixture between 29″ wheels and 26″ wheels. However, the 27.5″ wheels are less forgiving than the 29″ wheels.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. With Hydraulic Disc brakes, you’ll be able to stop on a dime, even in wet or icy conditions. To sum up, these are ideal for anyone.