Words by Drew Rohde

As soon as we pulled the new Polygon Siskiu T8 out of the box we knew there was some cool stuff going on. The metallic flake, rich purple and color-changing downtube made this poised 135mm/140mm mountain bike look good standing still. At 5’11” we ordered a size large Siskiu T8 and felt it was the appropriate size for our riding style. Polygon’s North American distributor, has a great sizing guide that can be helpful and ensure you pick the right size if you’re unsure which way to go.

We recently rode a Siskiu in our Budget Bike Shootout and Giveaway just a couple months ago and found it to be one of the most fun riding bikes in our group in its 27.5” iteration. In fact it was Sourpatch’s top pick for the shootout. The new Polygon Siskiu is now available in two wheel sizes depending on frame size, the large and XL come with 29” wheels while the medium frame can run either 29 or 27.5”, and the small size will come with 27.5” wheels.

While there are countless new things to check out when it comes to the new Siskiu, one of the most important things and something fans will be thrilled about is Polygon’s commitment to budget-minded riders.

On the trail we certainly noticed the changes to the bike’s geometry as well as the larger wheels. We still want to spend some more time tweaking with the suspension settings, but felt that even if the shock tune and suspension design weren’t that much better at pedaling that its predecessor, the geometry undeniably helped get us into a more efficient and comfortable platform. Still, it doesn’t climb like some other higher end bikes in the same travel category, yet. Stay tuned for a long term review and possible suspension upgrades to see if we can’t wake this thing up even more!

When it came time to ride this bike the way we see most Polygon’s getting ridden on Instagram, ruthlessly aggressive, we forgot how much we loved the purple and started focusing on how much we liked the way it snapped around corners. With a 335mm bottom bracket heigh, 430mm chainstays and a wheelbase of 1,220mm, this thing is a blast to snap, flick and shralp. The reach on our size large is 480mm and the 65.5-degree head tube angle worked well to put us in a well-balanced and neutral riding position whether we were spinning hard on the pedals in the seat on traversing bits of trail, or standing up to charge high speed descents.

Although the bike is a blast on smoother trails, while jibbing, popping and jumping, we’ve not yet found our happy spot with the suspension after just two rides. We plan on continuing our quest to make this bike handle the hits as well as it does everything else but we’ve just not had enough time to get there yet. We hope that with some more tuning, and possibly adding some volume reducers we can get this bike to open up and smoothen out rougher terrain. It is definitely an improvement over the previous Siskiu we rode, but we want more in terms of square-edge hits and bump absorption on chattery trails.

Overall, our first impression of the new Polygon Siskiu T8 has been good but not perfect. The bike is a solid value, looks so good and is more than capable to be ridden at a very high level. We hauled some serious ass on this bike down some of Central Oregon’s favorite trails, but our hands were a bit more tired than usual due to the suspension feedback. With a bit more time we hope to get that sorted. If you don’t spend a lot of time riding washboards, roots, or square-edge terrain then you’ll really want to consider looking at this bike sooner than later as inventory could be gone sooner than later due to COVID’s crazy bike sale side effect.

The Polygon Siskiu T8 excels in tight terrain, at high speeds, and most definitely in the turns! It is a blast to lean this bike over let the back end drift and catch or just getting out and spinning through the trees on flowy singletrack.

Stay tuned for a full review coming after some more tweaking, tuning and riding.

Polygon Siskiu T Series

Polygon Siskiu T Series:
A Journey of Progression.
Any Trail. Any Rider

Riders’ dreams aren’t limited by the depth of their pockets. The latest evolution of the Siskiu Trail series opens up any trail to any rider through encompassing progressive geometry into an attainable package. Polygon is one of the few global bike brands that own our manufacturing facilities, allowing us to control all aspects of the development and manufacturing process while leveraging large scale efficiencies. This guarantees our customers innovative bikes at unbeatable value; making your dreams a reality.

When developing the new Siskiu T, we put ourselves in the riders shoes and went back to the drawing board, starting with a water bottle! Designed around our Wheel Fit Size System,the Siskiu T features 29” wheels on LG & XL frame sizes, MD sizes offering the choice of 29” or 27.5” and SM sizes being optimized around the agility of 27.5” only.

29” models feature 135mm of rear travel with 140mm forks whilst 27.5” bikes have 140mm in the rear with 150mm up front. Seat tubes have been significantly shortened to allow for 150mm dropper posts on SM and MD frame, 170mm on LG and XL.The frame also comes with a threaded bottom bracket, Boost axles front and rear and internal cable routing through the main frame.

Geometry has progressed in the past few years and trail bikes are becoming more capable than ever. When developing the new Siskiu T we aimed to prove that you don’t have to pay a premium for modern geometry. The Siskiu T handles the demands of a modern trail bike, striking the balance between high speed control and playful handling.

The reach was lengthened 25-30mm on all sizes and the trail has also been increased by a 1° slacker head angle combined with short offset forks, improving stability and confidence at speed and on steeper terrain. The chainstays were shortened to keep the bike fun but also ensure that the overall wheelbase isn’t too long for general trail riding. The benefits of a steep seat angle can’t be understated, which is why the effective seat angle has been increased significantly to 76.5°.

On the trail the Siskiu T feels just as responsive and agile as the previous generation but the overall ceiling of what the bike is capable of has been lifted

Polygon Siskiu T Series

The Siskiu T utilizes the tried and tested FAUX BAR design. The linkage is built around the One Piece Unibody Pivot Bridge that reduces the frame’s weight but also improves stiffness and reduces lateral flex on the rear shock under load.The kinematics of the bike maintain the poppy supportive nature of the previous generation, while improving the climbing efficiency and small bump compliance. The pedaling platform is efficient thanks to the 10% increase in anti-squat. Thanks to the increased anti-squat a lighter custom tune on the shock could be used to improve small bump compliance and allow the suspension to move more freely. The leverage curve has been smoothed out slightly to still provide a high level of progression but improve sensitivity. The axle path has also been improved, staying rearward for longer, further enhancing performance over square edged hits.

Polygon Siskiu T Series


Fork: Fox 34 Rhythm Boost (140mm29”/150mm 27.5”)

Shock: Fox Float DPS (210x55mm)

Drivetrain: Shimano 12speed SLX M7100

Price: US$2299

Polygon Siskiu T Series


Fork: Rockshox Recon Boost (140mm29”/150mm 27.5”)

Shock: Rockshox Select Plus (210x55mm)

Drivetrain: Shimano 12 speed Deore M6100

Price: $1799

Polygon Siskiu T Series


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