Black POLYGON Siskiu T8 27.5” Full Suspension Mountain Bike image 1
Black POLYGON Siskiu T8 27.5” Full Suspension Mountain Bike image 2
Black POLYGON Siskiu T8 27.5” Full Suspension Mountain Bike image 3
Black POLYGON Siskiu T8 27.5” Full Suspension Mountain Bike image 4

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Key featuresexpand_more

The Polygon Siskiu T8 has been engineer to handle the demands of a modern trail bike, striking the balance between high-speed control and playful handling. Designed around a ALX trail frame for lightness and speed, the Siskiu features Tektro HD brakes for impressive stopping power and Fox 34 Rhythm Boost with 150mm suspension fork travel. This model is offered in 27.5” wheel size.

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.


  • Trail-ready full suspension 27.5” mountain bike
  • Frame: ALX Trail Frame 140mm Travel (27.5”)
  • Dropout: Alloy Thru Axle Dropout
  • Fork: Fox 34 Rhythm Boost 15x110mm, 150mm (27.5”)
  • Rear Shock: Fox Float DPS Special Tuning E2E: 210x55mm, Hardware: 8mmx25mm
  • Handle Bar: Entity Xpert, Alloy W: 780mm R: 20mm BB: 35mm
  • Stem: Entity Xpert, Alloy E: 35mm R: 7DEG BB: 35mm
  • Grips/Bar Tape: Entity Rubber Grip W/ Lock Ring
  • Head Set: ZS 44/28.6 | ZS 56/40
  • Saddle: Entity Xtent
  • Seat Post: Dropepr Post 150mm
  • Seat Clamp: Bolt Seat Clamp
  • Chain Set: Shimano FC-MT510-1 Boost 32T 170mm
  • BB Set: BSA Threaded
  • Chain: KMC X12 12 Speed
  • Cassette: Shimano CS-M7100-12 SLX 10-51T
  • Shifting Lever – Right: Shimano LD-M7100-R SLX
  • Rear Derailleur: Shimano RD-M7100 SLX
  • Tyres Front & Rear: Performance Tyre 27.5”x2.40”
  • Rims: Entity XL2 Disc 584-35 (27.5”)
  • Front Hub: Shimano Front Hub
  • Rear Hub: Shimano Rear Hub
  • Through Axle: Alloy Thru Axle Dropout
  • Front & Rear Brake: Tektro HD-M745 4 Piston


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 the image) 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.

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