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Description

DOWNHILL REBORN

After years of development, Polygon returns to the DH scene with the all-new Collosus DH—a bike that blends racing pedigree with bike park versatility. Born from the Collosus N enduro platform and refined over two full UCI Enduro World Cup seasons with Polygon's Factory Racing team, the DH is built for the rigors of racing and aggressive riding. Designed for riders who demand speed, adjustability, and reliability at full send.

IFS LINKAGE DESIGN

Polygon’s 6-bar Independent Floating Suspension (IFS) delivers a highly tunable ride, separating wheel path and anti-squat from the leverage curve for precision performance. The result? Better control under braking, optimal cornering traction, and responsive support over repeated hits—whether sending gaps or charging through relentless rock gardens.

TUNE IT YOUR WAY

Versatility is at the core of the Collosus DH. With four geometry configurations and the option to run either a mixed wheel (MX) or full 29er setup, the bike lets riders tailor their ride to the terrain and their style. Seamlessly transition from playful park laps to full-on DH race runs—whether you want quick handling or straight-line speed, the Collosus DH adapts.

ROCKSHOX BOXXER

The new Boxxer brings race-proven technology to riders of all levels, delivering top-tier performance in a more accessible package. With a fresh 38mm chassis, DebonAir+ twin-tube air spring, and Charger 3 RC damper, it’s built to handle everything from elite race runs to all-day bike park sessions.

ROCKSHOX VIVID

Pure downhill performance, built to last. The Vivid packs all the tech you need into a sleek, no-nonsense package. With an air spring that mimics the plush feel of a coil, it carries on Vivid’s legacy of smooth, controlled suspension for every run.

TRP DH-R EVO

The TRP DH-R EVO brakes bring a new level of speed control to downhill racing. With increased modulation, enhanced heat dissipation, and the brute stopping force of 203mm rotors, they deliver consistent, confident braking on the steepest, fastest descents.

RACE FACE ATLAS 35

Backed by decades of Race Face R&D, the Atlas lineup is built for serious gravity riding. Tough, dialled-in geometry and extra width when you need it—this cockpit is all about sending it with confidence.

SCHWALBE TACKY CHAN

The Schwalbe Tacky Chan is built for serious downhill shredding, developed with top racers for ultimate performance. Featuring the Addix Soft compound and Super Gravity casing, it delivers unbeatable grip, durability, and control on loose and wet terrain.

Components

FRAMESET
FRAME
ALX Alloy Frame, 200mm travel, Mullet (29" F / 27.5" R), 157mm O.L.D., BSA 83mm threaded BB, Floating Suspension, Adjustable Geometry, Carbon Upper Linkage
HEADSET
FSA N0.76 Sealed Bearing 51/59mm ZS 51/28.6 | ZS 59/30
SUSPENSION
FORK
RockShox Boxxer Base, Air Spring, 200mm Travel, Charger 3, Compression, Rebound, 20x110mm Thru Axle
SHOCK
RockShox Vivid Base, 250x75mm, M8x30mm For Both Sides
DRIVETRAIN
REAR DERAILLEUR
SRAM GX DH 7-Speed
SHIFTER
SRAM GX DH 7-Speed
CRANK
SRAM Descendant DH, Arm Length: 165mm (S, M, L, XL)
CHAINRING
34T (Max 36T)
CASSETTE
SRAM PG720 7-Speed, 11-25T
CHAIN
KMC X11
BRAKES
FRONT BRAKE
TRP DH-R EVO Hydraulic Disc Brake, 4-Piston Calipers
REAR BRAKE
TRP DH-R EVO Hydraulic Disc Brake, 4-Piston Calipers
ROTOR
TRP RS01E, 203mm, 6-bolt
WHEELS
REAR HUB
Novatec 32H TA 12X157 6B For Cassette Sprocket
RIM
Polygon MT6 Alloy Rim 27.5 Rear, 29 Front, 29mm internal width, 32H, Tubeless Compatible **
TYRE
Schwalbe Tacky Chan Super Gravity, Addix Soft, Front: 29x2.4", Rear: 27.5x2.4", Tubeless Compatible **
CONTACT POINTS
HANDLEBAR
Raceface Atlas 35, 820mm Width, Rise: 35mm, 8° Back-Sweep, Bar Bore: 35mm
GRIPS
Lock-on Grips
SADDLE
Xtent, Steel ø 7mm
SEATPOST
Polygon Expert 34.9mm, 320mm, Seatpost Clamp: 38.9mm
STEM
Raceface Atlas 35, 50mm Length, Bar Bore: 35mm
PEDALS
Flat Alloy
WEIGHT
BIKE WEIGHT
39.12 lbs

*Specs subject to change based on availability.

** Tubeless valves and sealant are sold separately

Geometry




MX



LOW HIGH
Frame Size S M L XL S M L XL
Height (cm) 5'0"-5'5" 5'4"-5'9" 5'8"-6'1" 6'0"-6'5" 5'0"-5'5" 5'4"-5'9" 5'8"-6'1" 6'0"-6'5"
(A) Frame Stack 635 635 635 635 632 632 632 632
(B) Frame Reach 433 456 476 498 437 460 480 502
(C) Head Tube Angle 62.6° 62.6° 62.6° 62.6° 63° 63° 63° 63°
(D) Head Tube Length 105 105 105 105 105 105 105 105
(E) Seat Tube Angle 71.6° 71.6° 71.6° 71.6° 72° 72° 72° 72°
Effective Seat Tube Angle 78.1° 78.1° 78.1° 78.1° 78.5° 78.5° 78.5° 78.5°
(F) Seat Tube Length 390 390 390 390 390 390 390 390
(G) Effective Top Tube 558 581 601 623 557 580 600 622
(H) BB Height 350 350 350 350 356 356 356 356
(I) BB Drop F:30 R:11 F:30 R:11 F:30 R:11 F:30 R:11 F:24 R:6 F:24 R:6 F:24 R:6 F:24 R:6
(J) Chainstay Length 446 446 446 446 445 445 445 445
(K) Wheelbase 1251 1274 1294 1316 1250 1273 1293 1315
(L) Standover Height 813 813 813 813 817 817 817 817
Front Travel 203 203 203 203 203 203 203 203
Rear Travel 200 200 200 200 200 200 200 200
Maximum Chainring Size 36T 36T 36T 36T 36T 36T 36T 36T




29"



LOW HIGH
Frame Size S M L XL S M L XL
Height (cm) 5'0"-5'5" 5'4"-5'9" 5'8"-6'1" 6'0"-6'5" 5'0"-5'5" 5'4"-5'9" 5'8"-6'1" 6'0"-6'5"
(A) Frame Stack 634 634 634 634 631 631 631 635
(B) Frame Reach 435 458 478 500 439 462 482 504
(C) Head Tube Angle 62.8° 62.8° 62.8° 62.8° 63.2° 63.2° 63.2° 63.2°
(D) Head Tube Length 105 105 105 105 105 105 105 105
(E) Seat Tube Angle 71.8° 71.8° 71.8° 71.8° 72.2° 72.2° 72.2° 72.2°
Effective Seat Tube Angle 78.3° 78.3° 78.3° 78.3° 78.7° 78.7° 78.7° 78.7°
(F) Seat Tube Length 390 390 390 390 390 390 390 390
(G) Effective Top Tube 557 580 600 622 556 579 599 621
(H) BB Height 352 352 352 352 358 358 358 358
(I) BB Drop 27 27 27 27 22 22 22 22
(J) Chainstay Length 446 446 446 446 445 445 445 445
(K) Wheelbase 1253 1276 1296 1318 1252 1275 1295 1317
(L) Standover Height 815 815 815 815 819 819 819 819
Front Travel 203 203 203 203 203 203 203 203
Rear Travel 200 200 200 200 200 200 200 200
Maximum Chainring Size 36T 36T 36T 36T 36T 36T 36T 36T



Note: 29er - Our bikes do not come set up as full 29’’. You can change to 29er which will result in the following numbers.


* All lengths in mm

Assembly

Get ready to hit the road with your new bike! It’ll arrive almost ready to go, but you’ll need to do a quick setup first. Don’t worry, we’ve popped all the tools you’ll need right in the box.

If you’re a bike-building pro: You’ll be done in just 10-15 minutes.
Got a knack for fixing things? Give it 15-25 minutes.
New to the DIY world? Take your time, around 30-40 minutes, and you’ll get there!

Need some visual aids? We’ve got you covered! Just click on our step-by-step video guide below for a smooth setup. Happy cycling!

Step 1

How To Unbox Your Dual Suspension MTB

Step 2

How To Setup Your Suspension

Step 3

Dial In Your Bike Fit

Step 4

Dial In Your Tyre Pressures

Step 5

Pre-Ride Check