For a more effortless and secure experience on our site, please consider updating your browser
Health & Bike Services


Health, Fitness & Wellbeing

Bike Coaching


Nutritionists - coming soon

Podiatrists - coming soon

Physiotherapists - coming soon

Remedial Massage - coming soon

Pilates & Yoga studios - coming soon

Spin studios - coming soon

Shop rides - coming soon

2019 Polygon Siskiu N8 Dual Suspension Mountain Bike


Ships within Australia
Buy online only


Loading Facebook Like button...


Key Features

  • ALX Enduro Alloy Boost frame with 170mm (27.5") / 160mm (29") of suspension travel (internal routed)
  • Tapered Head Tube
  • Rockshox Yari RC DebonAir Boost front air fork
  • Fox Performance Float DPX2 air shock with external rebound and 3 position compression
  • 1 x 12 SRAM NX Eagle drivetrain
  • Tektro Orion 4 Piston Hydraulic disc brakes
  • EXA Form Drive Dropper seat post
  • Entity XL2 tubeless ready wheelset with Schwalbe Nobby Nic tyres.
  • 5 Year Warranty on frame
  • Full manufacturer?s warranty on parts
  • Weight = 14.9kg (Size M)
Building on the tremendous success of the Siskiu D and more recently the Siskiu T range over the past few years, we are excited to introduce you to the newest and burliest member of the Siskiu family - the Siskiu N - Polygon's latest alloy all mountain / enduro steed. The Polygon Siskiu N8 is the bike you've been waiting for and it comes with all the parts and clever technology you'd expect from Polygon, like the frame size specific 29er or 27.5" wheels, internal dropper post, Rockshox Yari front fork suspension and a 1x12 drivetrain. 
The Siskiu N is built around a new lightweight, hydroformed 6061 aluminium Boost frame and longer 160mm (29er) / 170mm (27.5") travel. By utilising a one piece linkage system, Polygon have been able to keep the frame weight down whilst reinforcing high-stress areas and reducing flex under heavy loads. The rear swing triangle also features a unibody pivot bridge that stiffens the rear wheel and provides you a lot more control when exiting high-speed corners and negotiating rock gardens. The Boost design means that Polygon have been able to include wide 29mm rims with 2.6" tyres (27.5" wheel) and 2.35" tyres (29" wheel). The frame is finished off with a tapered headset, rear thru axle, and internal routing for gears, brakes and dropper seat post.
The  Siskiu  N series utilises  Polygon's new Wheel Fit Size System whereby each frame size is paired with the wheel size that best fits the rider and sets them up for optimal efficiency and power transfer. We pair 29er wheels with 18.5" and larger bikes, and more proportional, better-fitting  27.5-inch  wheels for 17.5" and smaller bikes.
A new SRAM NX Eagle 1 x 12 drivetrain powers the N8 with a massive 50T rear cassette providing plenty of range to glide up those steep climbs. A single trigger shifter keeps things simple while providing smooth, quiet action and reliable chain retention (thanks to a single chainring and rear-derailleur clutch). The Descendant crankset is engineered for complete chain control. Each tooth?s thickness is precisely toleranced and controlled to work seamlessly with the SRAM chain?s inner and outer links eliminating the need for a bulky chain guide and continuing the clean looks of the bike.
Dampening duties on the N8 are provided by a Rockshox Yari DebonAir front fork. This is combined with a dependable Fox Performance Float DPX2 air shock on the rear with external rebound and 3 position compression. The bike rolls on a pair of wide 29mm rim Entity XL2 tubeless ready wheels and Schwalbe Nobby Nic tyres with a nice and wide 2.35" to 2.6" width giving you loads of traction for climbs and hitting the berms.
Completing the Polygon Siskiu N8 is an EXA Form Drive dropper seat, Entity Xpert cockpit, and Tektro Orion 4 Piston Hydraulic Disc Brakes. 

Brand: Polygon
Type: Dual Suspension Mountain Bikes
Gender: Unisex
Material: Aluminium
Riding Style: Enduro
Wheel Size: 27.5"
Rear Derailleur: SRAM NX Eagle
Item condition: New
Availability: Buy online
ID: 104220153

Store info

We are an Australian owned, specialty retailer of road bikes, mountain bikes, parts, accessories, and clothing. We deliver the personalized service of the best local shops, but with a dynamic, interactive experience only possible on the web — specially designed to make you knowledgeable and confident about every product we sell.

You may have noticed that our prices are some of the most competitive in the industry. Why? Because as an independent Australian retailer, we are able to go straight to the manufacturers and bypass the agents, importers, wholesalers and distributors that are usually part of the retail process. By cutting out these expensive middlemen, we can pass the savings on to you, where they belong.

When you order a bike from Bicycles Online, you can be assured our staff will treat your bike as their own. Our team approaches builds with care and precision following a detailed Pro Build process developed over years of refinement. We combine our years of experience with your specific needs in order to deliver a bike that will shift crisply, brake solidly, stay in adjustment, and provide years of awesome riding.

Questions? Please don’t hesitate to contact us. We hope to become your resource as you shop for a new pro-quality bike, or any of the parts, clothing, or accessories that you need.

Shipping policy

Exchange, Returns, and Refunds Policy

Please choose carefully before you buy.

For faulty products, offer a 14 DAY REPLACEMENT WARRANTY, from the date you receive your product. They do not offer a satisfaction guarantee on any of their products, however due to their high level of customer service, they will always endeavour to keep customers happy and satisfied.

If your product is faulty, it will be replaced with an identical product. If they cannot replace the product, they will offer you the option of choosing another product of the same value, or provide you with a refund for the total value of the faulty product.

Please note: Standard postage fees apply to all return orders. Where the return relates to a faulty item, the replacement product will be sent out to you, at no charge, within 5 working days from the date we receive the faulty product.

When returning your product, please make sure you provide the following details:

  • Your full name
  • Your order number
  • Reason why you are returning the product
  • Your instructions informing us how you would like the issue resolved.

Please include the original order confirmation or invoice you received with your product. Also, if you haven't previously provided a contact phone number, please include this with your return. This will ensure the issue is resolved quickly, should anyone need to contact you.

2019 Polygon Siskiu N8 Dual Suspension Mountain Bike


Ships within Australia
Buy online only


Loading Facebook Like button...