Details
REFINED FOR MORE
The revamped Siskiu T adds UDH compatibility, a reinforced rear triangle, and improved internal cable routing for a sleek, future-proof build. A discreet top-tube mount adds utility, while progressive suspension with a larger volume spacer smooths big hits. A 0.5° slacker head tube, slightly steeper seat tube, and longer reach improve stability and climbing balance without changing the familiar Siskiu ride feel.
ULTIMATE VALUE
Built for riders who demand uncompromising performance: FOX 36 Factory GRIP X2 fork and Float X Factory shock, Shimano XT 12-speed with crisp lever feel, and I-Spec EV dropper remote for smooth actuation and a clean cockpit. XT 4-piston brakes and Maxxis DHF EXO+ / Dissector DD tires complete a performance-focused build.
ANY TRAIL, ANY RIDER
The Siskiu T is Polygon's do-it-all trail bike for riders of all levels. From flowy singletrack to technical features, this bike is designed to conquer any trail you encounter. With a lightweight alloy frame, 135mm of rear travel, and 29er wheels, it's both nimble and stable, providing a comfortable and confidence-inspiring ride.
INDUSTRY REVIEWS
"The Siskiu T is exceptional value and ticks all the right boxes for a modern trail bike that can be ridden from smooth greens to technical blacks, and everything in between." - Flow Mountain Bike
Specs
| frameset | |
|---|---|
| Frame | ALX Trail Aluminum Frame, 135mm Travel (29"), Internal Brake and Shifter Routing, ISCG 05 Mounts, BSA Threaded BB (73mm), 34.9mm Bolt Type Seat Clamp, 12x148mm Boost Thru-Axle, UDH Dropout |
| Headset | FSA NO.57E, ZS 44/28.6 | ZS 56/40 Tapered |
| suspension | |
| Fork | Fox 36 Float Factory Series, 140mm Travel, FLOAT, GRIP X2 Damper, High/Low Speed Compression, High/Low Speed Rebound, 15x110mm Kabolt Boost Axle |
| Shock | Fox Float X Factory Series, EVOL LV Air Spring, Rebound, Compression, 2-Position Lever, E2E: 210x55mm |
| drivetrain | |
| Rear derailleur | Shimano Deore XT RD-M8100-SGS, 12-Speed, Direct Attach |
| Shifter | Shimano Deore XT SL-M8100, 1x12-Speed Trigger |
| Crank | Shimano Deore XT FC-M8120-1 Boost, 165mm Crank Arm, BSA Threaded |
| Chainring | 32T (Max 34T Single Ring) |
| Cassette | Shimano Deore XT CS-M8100-12, 10-51T, Micro Spline |
| Chain | Shimano CN-M8100, 12-Speed |
| brakes | |
| Front brake | Shimano Deore XT BR-M8120, 4-Piston Caliper |
| Rear brake | Shimano Deore XT BR-M8120, 4-Piston Caliper |
| Rotor | Shimano RT-CL800 Center-Lock, Front: 203mm / Rear: 180mm |
| wheels | |
| Front hub | Shimano Deore XT HB-M8110-B, Boost 15x110mm, 32H, Center Lock |
| Rear hub | Shimano Deore XT FH-M8110-B, Boost 12x148mm, 32H, Center Lock, Micro Spline Freehub |
| Rim | Polygon MT9 29", 32H, 29mm inner width,Tubeless Ready ** |
| Tyre | Front: Maxxis Minion DHF 29x2.50", 3CT, EXO+, TR | Rear: Maxxis Dissector 29x2.40", 3CT, DD, TR |
| Max tyre size | 29x2.60" |
| contact points | |
| Handlebar | Polygon Expert, Alloy, 780mm Width, 35mm Bar Bore, 30mm Rise |
| Saddle | Fizik Terra Alpaca X5, S-Alloy Mobius Rail |
| Seatpost | Tranz X JD-YSP23KL Dropper Post, 30.9mm, 150mm Travel (S, M) / 170mm Travel (L, XL), Shimano SL-MT800-L, Dropper Post Remote Lever, I-Spec EV Compatible |
| Stem | Polygon Expert, Alloy, 35mm Extension, 35mm Clamping Diameter, 0° Rise |
| Pedals | Alloy Flat Pedal w/ Replaceable Pin & Reflector |
| weight | |
| Bike weight | 35.68 lbs ( Size M ) |
Geo
| Frame Size | S | M | L | XL |
| Rider Height | 5'2"–5'6" | 5'6"–5'10" | 5'10"–6'1" | 6'1"–6'5" |
| (A) Frame Stack (mm) | 604 | 609 | 622 | 636 |
| (B) Frame Reach (mm) | 440 | 465 | 485 | 505 |
| (C) Head Tube Angle (°) | 64.5 | 64.5 | 64.5 | 64.5 |
| (D) Head Tube Length (mm) | 89 | 95 | 110 | 125 |
| (E) Seat Tube Angle (°) | 71.2 | 71.2 | 71.2 | 71.2 |
| Effective Seat Tube Angle (°) | 77 | 77 | 76 | 77 |
| (F) Seat Tube Length (mm) | 390 | 400 | 415 | 430 |
| (G) Effective Top Tube (mm) | 568 | 595 | 619 | 644 |
| (H) Bottom Bracket Height (mm) | 337.5 | 337.5 | 337.5 | 337.5 |
| (I) Bottom Bracket Drop (mm) | 39 | 39 | 39 | 39 |
| (J) Chainstay Length (mm) | 430 | 430 | 432 | 430 |
| (K) Wheelbase (mm) | 1186 | 1214 | 1240 | 1267 |
| (L) Standover Height (mm) | 704 | 705 | 711 | 723 |
| Front Travel (mm) | 140 | 140 | 140 | 140 |
| Rear Travel (mm) | 135 | 135 | 135 | 135 |
| Dropper Post Travel (mm) | 150 | 150 | 170 | 170 |
| Handlebar Width (mm) | 780 | 780 | 780 | 780 |
| Stem Length (mm) | 35 | 35 | 35 | 35 |
| Crank Length (mm) | 165 | 165 | 165 | 165 |
Build
2024 Polygon Siskiu T8
Your bike needs minor assembly before riding; use the tools and videos included.
As a guide, it'll take 10-40min depending on whether you're an experienced bike assembler or have little to no mechanical experience.
Side Note: Your cables will stretch during the initial bed-in period and must be adjusted by an experienced mechanic around 150km of riding.
Unboxing Your Bike
Dial In Your Suspension Setup
Dial In Your Bike Fit
Dial In Your Tyre Pressures
Pre-Ride Check