Yellow POLYGON Siskiu D6 Full Suspension Mountain Bike image 1
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Key featuresexpand_more

The Polygon Siskiu D6 is an all-round XC trail-full suspension bike engineered to take on the trail from local stomping grounds to all-day mountain adventures further afield. Built around a lightweight aluminium suspension frame, the Siskiu D6 benefits from modern geometry, a slack head tube angle and long reach and a steep seat angle. The result is an optimised pedal performance and progressive suspension for when the trail gets rowdy.

The bike climbs like a hardtail with additional comfort and traction, and comes in a striking yellow colourway that stands out on trail adventures.

About Polygon

Polygon are a world-renowned bike manufacturer with over 25 years of cycling expertise. Producing close to a million bikes a year out of their state-of-the-art manufacturing facilities, their commitment to innovation and craftsmanship has seen them pick up numerous industry awards and become the brand of choice for leading professionals. You’ll be in good company when you ride a Polygon.


  • Rear Shock: SUNTOUR RAIDON LO AIR, E2E: METRIC 190x45mm
  • Handle Bar: ENTITY SPORT ALLOY, W: 760mm, BB: 31.8mm, R/D: 12mm, B: 6degree
  • Stem: ENTITY SPORT ALLOY, EXT: 45mm, BB: 31.8mm, R/D: 0Degree
  • Head Set: THREADLESS ZERO STACK HEADSET, ZS 44/28.6 | ZS 56/30
  • Saddle: ENTITY VOID SADDLE, 7mm
  • Seat Post: RAGE-I DROPPER 150mm / 170mm travel, 30.9 x 442mm (S-M) / 495mm (L-XL
  • Bottom Bracket: BSA THREADED 68/73mm
  • Chain: KMC X10-1
  • Cassette: SHIMANO DEORE CS-M4100 10-42T 10-SPEED
  • Front & Rear Tyres: DELI 27.5"x2.25" / 29"x2.25"
  • Internal routing for clean look


Height/cm 152.5-165 162.5-175 172.5-185 182.5-195
Size S M L XL

Please Note: Due to ongoing issues in the supply chain, this bike is subject to specification changes without notice. Any changes made will be using equivalent or higher quality parts.

**Some minor assembly is required. See our video (below) or consult our assembly guide for assistance.

Unfortunately, we are not able to process faulty or warranty bike returns through our warehouse. If your bike develops a fault, please take it to your nearest GO Outdoors store where we have a full workshop and trained mechanics who will be able to assist you.

Please note, this excludes Hathersage and Southport stores.

Delivery & Returnsexpand_more

This product qualifies for the following delivery methods.

Standard Delivery (FREE)

A tracking link will be provided once your order is despatched.


Returning orders to us is easy. Whatever your reason, we offer a refund or exchange within 28 days of delivery or collection.


Overall rating

5.00 out of 5
1 review
Write a review
5 out of 5


Love this bike, it's done hundreds of loops of the verderers and freeminers trails at FOD without any issues. Bit heavy in the climb but perfect for me. Dropper post was a pain to sort, other than that I'm happy.


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