Polygon Collosus DH9 Frameset - Downhill Mountain Bike


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The new Polygon Colossus DH9 frame and suspension system has been carefully redesigned by the engineers at Polygon and with intensive feedback from the UR Team racing the DH World Cup Championships. In particular, Australians Mick Hannah “Sik Mik” and Tracey Hannah had a pivotal role in creating this new frame, with now better traction over rough sections, better pedalling efficiency, and a more precise steering feedback. The rear suspension system is now more progressive and the shock ramp up has been fine tuned. To increase rear end stiffness, the rear triangle is now made out of Polygon’s proprietary ACX Carbon, which was moulded and shaped to be extremely stiff laterally, soak up small vibrations and bumps better, keeping the rear wheel grounded for better traction, and also the added benefit of shedding weight from the frame. Testing wheel sizes was also a huge deal in making the Polygon Collosus DH9 frame, with Polygon testing 26”, 27.5” and even 29” wheels. In the end, 27.5” wheels (or 650b) were the clear winners, offering extra speed on the flats, soaking up the punishment of rock gardens with ease and allowing to build a super nimble bike to tackle the most demanding technical sections in the Downhill World Cup calendar.


The frameset is also supplied with the Top of the Line Fox DHX2 Factory rear shock. With it's Kashima stanchion, new and improved Rebound and Compression adjustments, the DHX2 sets a new benchmark for Downhill performance. Shock Springs are also framesize sensitive, with Small and Medium frames supplied with a 350 lbs, Large frame with 400 lbs spring and the eXtra Large frame 450 lbs.




  • ALX Advanced Hydroformed 6061 Aluminium Downhill Frame with ACX Carbon Rear Triangle 
  • Floating Suspension System 3 technology (FS3)
  • Fox DHX2 Factory rear shock
  • FSA No.57E-1 Tapered Headset Included - Internal Diameter 44/56mm
  • 5 Year Warranty on frame
  • Full manufacturer’s warranty on parts



  • 27.5 inch wheels
  • Tapered Head tube
  • 157 x 12mm Rear Axle
  • 30.9mm Seat tube
  • 83mm English BB shell
  • Internally routed cables



Sizes (A) Stack (mm) (B) Reach (mm) (C) Head Tube Angle (D) Head Tube Length (mm) (E) Head Tube Diameter (mm) (F) Seat Tube Angle (G) Seat Tube Length (C-T) (mm) (H) Top Tube Actual (mm) (I) Top Tube Effective (mm) (J) Front Center (mm) (L) Rear Center (mm) (M) BB Height (Ground Clerance) (mm) (N) BB Height (BB Drop/Rise) (O) Stand Over Height (mm) (P) Rear Wheel Axle / O.L.D (mm) (Q) Seatpost Size (mm)
15 (S) Low BB 595.1 377.6 62.8 110 Tapered 50/44~62/56 62.8 383 476.8 536 743.3 442.8 361.4 2.9 Rise 725.1 12 x 157 30.9
15 (S) Hi BB 593.4 380.3 63.1 110 Tapered 50/44~62/56 63.1 383 476.8 534.8 743.3 441.5 364.7 6.2 Rise 728.5 12 x 157 30.9
15 (M) Low BB 595.1 397.6 62.8 110 Tapered 50/44~62/56 62.8 383 494.8 556 763.1 442.8 361.4 2.9 Rise 724.8 12 x 157 30.9
15 (M) Hi BB 593.4 400.3 63.1 110 Tapered 50/44~62/56 63.1 383 494.8 554.8 763.3 441.5 364.7 6.2 Rise 728.3 12 x 157 30.9
15 (L) Low BB 595.1 425.3 62.8 110 Tapered 50/44~62/56 62.8 383 519.9 583.8 791 442.8 361.4 2.9 Rise 724.7 12 x 157 30.9
15 (L) Hi BB 593.4 428 63.1 110 Tapered 50/44~62/56 63.1 383 519.9 582.5 791 441.5 364.7 6.2 Rise 728.1 12 x 157 30.9
15 (XL) Low BB 595.1 447.3 62.8 110 Tapered 50/44~62/56 62.8 383 540.1 606 812.4 442.8 361.4 2.9 Rise 724.7 12 x 157 30.9
15 (XL) Hi BB 593.4 450 63.1 110 Tapered 50/44~62/56 63.1 383 540.1 604.5 813 441.5 364.7 6.2 Rise 728.1 12 x 157 30.9


We understand how important shipping is once you click "buy now", that's why we have the following policies

Australian Warehouse

All products are in stock and ready to ship from our Sydney warehouse (with the exception of preordered bikes, which have the dispatch date illustrated)

Next day dispatch

All orders received by 5 pm AEST will usually be dispatched the following business day. If an order is placed on the weekend or public holiday, please note dispatch will usually be the next working day. For tracked shipments, please allow 12 hours for tracking to begin.

Shipping of Parts, Accessories and Apparel

Economy Shipping

There is free delivery available on all small parcels Australia wide using tracked services of Australia Post or Fastway, no minimum order value required! Estimated delivery time is 4-9 business days. 

Express Shipping

We do also offer Express Shipping for a small additional fee on parts, accessories and apparel orders. Estimated delivery time on Express Shipping is 1 to 4 business days.

Shipping of Bikes

Shipping of bikes and other bulky goods is free to 85% of residences in Australia. However, some postcodes incur a surcharge starting from $29. 

Once shipped you will be issued a consignment number which can be used to track your parcel. We use Direct Freight Express for deliveries and you can track your delivery by calling 1300 347 397 or online at www.directfreight.com.au


This bicycle is backed by a 5 year factory warranty on the frame and full manufacturer’s warranty on parts.

Warranty is valid only for bicycle that has been properly and well-maintained under the following conditions:

Warranty includes:

  • All damaged or fractured or broken frame / fork / component which was caused by manufacturing or assembling error in factory.
  • Non functioning mechanism caused by manufacturing error in factory.

Warranty is NOT valid for:

  • Incorrect assembly, i.e pedals installed in the wrong crank arm. 
  • Normal degradation caused by frequent use, such as degrading brake shoe, deflated tire, etc
  • Surface defects, such as stained, marred, defaced, etc
  • Damaged caused by misuse or accident
  • Other damages which are not caused by factory error
  • Bicycles which have been sold to another party
  • Bicycles used in commercial capacity, such as rentals
  • Bicycles which have not been well-maintained

For any damages which is guaranteed by the brand as the first condition above, the brand will repair or replace damaged frame / fork / component with the one of the same brand or similar.

Warranty is valid for all Polygon and Marin bicycles to the original owner only, by showing the purchase invoice.  

To make a claim click here.

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