2021 Polygon Siskiu T7 Dual Suspension Mountain Bike

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Light & durable Hydroformed 6061 Aluminum frame features a tapered head tube, rear boost thru-axle, 73mm threaded bottom bracket, internal cable routing and optimized anti-squat kinematic with progressive suspension ratio.


The Siskiu T handles the demands of a modern trail bike, striking the balance between high speed control and playful handling. Siskiu T models utilise a slack head tube combined with short offset forks, longer frame reach and a steep seat tube, improving stability and confidence at speed and on steeper terrain.


The FAUX BAR linkage is built around the One Piece Unibody Pivot Bridge that reduces the frame’s weight while at the same time improves stiffness and reduces lateral flex. The pedalling performance is improved due to increased anti-squat and the suspension is now more active thanks to a custom shock tune. The leverage curve provides a high level of progression while maintaining sensitivity for small bump compliance.


Boost is the modern standard for wheel and drivetrain specification that opens the opportunity for improved frame geometry with shorter chainstays, wider and stiffer suspension pivots, wider range of chainring options, as well as more clearance for bigger tires and wider, stiffer wheels.


With optimized material concentrated at the brace and seal area, outstanding stiffness and steering precision, Recon RL is an all-around performer. Proven Motion Control damper featuring low speed compression adjust to lockout with external rebound adjust and Solo Air spring for a plush, predictable ride you can set up in seconds.
New Maxima Plush damping fluid reduces friction and silences damper noise and highly tunable Debon Air spring offers a coil-like consistent feel throughout the travel with separate and independent open and threshold pistons tuned exactly for your ride.
Deliver a new level of premium performance to the value category by bringing hallmark elite mountain bike technologies that maximizes versatility with it’s 510% gear range at unmatched value.
High power and controllable braking system combine front 4 piston and rear 2 piston calipers with 180mm Shimano Centerlock rotors.
Dropping the seat allows you to maximize climbing and descending performance. The dropper features 150mm (S-M) / 170mm (L-XL) of travel and remote lever to easily find the optimal saddle height for confident descending and efficient pedalling.
Entity XL2 35mm internal width rims provide better traction and stability by creating a wider contact patch between the tires and the ground. Shimano hubs featuring a Micro Spline freehub complete the set with reliable trail performance.




The Polygon Siskiu T delivers the ultimate value for money trail bike that modern riders have been waiting for. The latest evolution of the Siskiu Trail series opens any trail to any rider through encompassing progressive geometry into an attainable package. From all-day epics to hot laps of your local loop, the Siskiu T delivers confident yet lively handling on everything from punchy climbs to rowdy descents as you push the limits of traction.


Designed around Polygon’s Wheel Fit Size System, the Siskiu T features 29′ wheels on LG & XL frame sizes, MD size offers the choice of 29′ or 27.5′ and the SM size is exclusively optimized around the agility of 27.5′. The frame is designed to ensure a water bottle can be nestled well in the frame, meaning longer rides; Heck yeah!


The Siskiu T handles the demands of a modern trail bike, striking a balance between high-speed control and playful handling. Progressive geometry was vital to achieving this. 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 benefits of a steep seat angle can’t be understated, which is why the effective seat angle has been increased significantly to 76.5′ while the chainstay length has been shortened by 5mm to maintain agility. 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.


The suspension is optimized around each wheel size; 29′ models feature 135mm of rear travel with 140mm forks while 27.5′ bikes have 140mm in the rear with 150mm upfront. Polygon’s proven FAUX BAR suspension linkage featuring a One Piece Unibody Pivot Bridge reduces the frame’s weight while improving stiffness and reducing lateral flex on the rear shock under load. The kinematics of the bike maintains 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, which has also allowed a lighter custom tune on the shock to improve small bump compliance and will enable the suspension to move more freely.


Seat tubes have been significantly shortened to allow for generous dropper post lengths, 150mm on SM and MD frames, and 170mm on LG and XL. The frame also features a hassle-free threaded bottom bracket, Boost axles for stiff and reliable wheels, and internal cable routing through the main frame keeping the bike looking sleek.


Beyond the frame, component selection has been optimized to deliver unbeatable bang for buck performance. RockShox suspension, Tektro disc brakes, and Entity Expert 35mm clamp cockpit provide the control you demand. Shimano’s 12-speed Deore drivetrain rips up and over any trail with its 510% gear range delivering power to the trail through the tubeless-ready Entity XL2 35mm internal width rims and high-volume tubeless-ready rubber. Upgrade from riding with tubes by adding tubeless tape, valves, and sealant to take your riding to the next level.


Here it is! The Siskiu T7 is your fun-filled machine that’s ready for everything you point it at ‘ Any Trail, Any Rider. The trails are calling!


Model Comparison Chart

2021 Siskiu T7 2021 Siskiu T8
Frame ALX Trail 6061 Aluminum Frame, 140mm (27.5″) / 135mm (29″) Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded Boost BB, 148x12mm Boost Thru-Axle, ISCG05 Mount ALX Trail 6061 Aluminum Frame, 140mm (27.5″) / 135mm (29″) Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded Boost BB, 148x12mm Boost Thru-Axle, ISCG05 Mount
Fork Rockshox Recon Silver-RL 150mm (27.5″) / 140mm (29″) Travel, Solo Air, Boost 15x110mm Axle Fox 34 Rhythm, 150mm (27.5″) / 140mm (29″) Travel, Grip Damper, Boost 15x110mm Axle
Rear Shock Rockshox Deluxe Select Plus, Debon Air, Rebound, 2-Position Compression, Custom Tune Fox Float DPS, Evol LV Air Spring, Rebound Adjuster, 3-Position Lever, Custom Tune
Crankset Shimano MT-510-1 Boost 32T, 170mm (S, M) / 175mm (L, XL) Shimano MT-510-1 Boost 32T, 170mm (S, M) / 175mm (L, XL)
Drivetrain Shimano Deore M6100 1X12 Speed Shimano SLX M7100 1X12 Speed
Brakes Tektro HD-M735, Caliper F/R: 4-Piston/2-Piston Tektro HD-M745, Caliper F/R: 4-Piston
Tire WTB Trail Boss G2 27.5×2.4″ / 29×2.4″, TCS Aramid Bead, Slash Guard Sidewall Protection, Tubeless Ready Schwalbe Hans Dampf Evo 27.5×2.60″ / 29×2.60″, ADDIX SpeedGrip, Snakeskin, Tubeless Ready
Rim Entity XL2 Disc 35-584 (27.5″) / 35-622 (29″), 35mm Inner Width, Tubeless-ready* Entity XL2 Disc 35-584 (27.5″) / 35-622 (29″) , 35mm Inner Width, Tubeless-ready*
Weight 33.8lbs 33.5lbs


How the Bike is Delivered to You

Your bike will arrive in a custom Bikes Online bike guard box as described in the video below.

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