Collosus DH7
OverviewAbout the Polygon Collosus DH7
The Polygon Collosus DH7 is a mountain bike, built on an aluminium frame, listed at $5,799.99 at BikesOnline. An off-road bike for trails, with grippy tyres and trail-ready geometry.
SizingWhat size Collosus DH7 do I need?
Enter your height to see the size Polygon recommends.
| Size | Rider height | In feet |
|---|---|---|
| S | 152 to 165 cm | 5 ft 0 in to 5 ft 5 in |
| M | 162 to 175 cm | 5 ft 4 in to 5 ft 9 in |
| L | 172 to 185 cm | 5 ft 8 in to 6 ft 1 in |
| XL | 182 to 195 cm | 6 ft 0 in to 6 ft 5 in |
| S | 152 to 165 cm | 5 ft 0 in to 5 ft 5 in |
| M | 162 to 175 cm | 5 ft 4 in to 5 ft 9 in |
| L | 172 to 185 cm | 5 ft 8 in to 6 ft 1 in |
| XL | 182 to 195 cm | 6 ft 0 in to 6 ft 5 in |
Rider heights from Polygon's size chart. Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Polygon
- Model year
- 2025
- Category
- Mountain
- Frame
- Aluminium
- Wheel size
- Mullet (29/27.5)
- Drivetrain
- SRAM GX 1x7
- Brakes
- Disc
- Frame sizes
- S, M, L, XL, S, M, L, XL
- Price
- $5,799.99 at BikesOnline. In stock, checked 3 Nov 2026.
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
- Stack
- 632 mm
- Reach
- 460 mm
- Stack/reach
- 1.37
- Head angle
- 63 deg
- Seat angle
- 78.5 deg
- Wheelbase
- 1273 mm
- Chainstay
- 445 mm
- Standover
- 817 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- SRAM GX
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 7
- Crank
- SRAM Descendant DH, Arm Length: 165mm (S, M, L, XL)
- Chainrings
- 34
- Cassette
- SRAM PG720 7-Speed, 11-25T
- Rear derailleur
- SRAM GX DH 7-Speed
- Brakes
- TRP DH-R EVO Hydraulic Disc Brake, 4-Piston Calipers
- Rotors
- 203mm
- Wheelset
- Polygon MT6 Alloy Rim 27.5 Rear, 29 Front, 29mm internal width, 32H, Tubeless Compatible
- Rim internal width
- 29 mm
- Stock tyre
- 29x2.4 / 27.5x2.4
- Tubeless
- Yes
- BB standard
- BSA threaded
- Seatpost
- Polygon Expert 34.9mm, 320mm, Seatpost Clamp: 38.9mm
- Cockpit
- Raceface Atlas 35, 50mm Length, Bar Bore: 35mm / Raceface Atlas 35, 820mm Width, Rise: 35mm, 8 deg Back-Sweep, Bar Bore: 35mm
- Saddle
- Xtent, Steel 7mm
SuspensionMTB detail
- Front travel
- 203 mm
- Rear travel
- 200 mm
- Fork
- RockShox Boxxer Base
- Shock
- RockShox Vivid Base
- Wheel config
- Mullet
- Discipline
- Downhill
- Suspension
- full suspension
Bike DNAWhat the numbers say
- Steering
- A 63 deg head angle points to very slack, built for steep descending.
- Climbing
- Lowest ratio 1.36 is taller, race-oriented gearing.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (BikesOnline product page (specification list and geometry table)), verified 2026-11-03. This is a specification analysis, not a physical ride review.
Where to buyStockist
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