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 chasing real trail performance: FOX 34 Rhythm fork and Float DPS Performance shock deliver responsive, balanced suspension, Shimano Deore 12-speed drivetrain ensures crisp, reliable shifting, and a Manic dropper post keeps you in control. Shimano 4-piston brakes and Maxxis Dissector EXO+ 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 changes made to the 2026 Polygon Siskiu T8 certainly fall into the ‘upgrade’ category in our minds… it is impressive to see that Polygon was able to accommodate those upgrades while somehow lowering the price. The frame still looks sharp and continues to stand out in its category.” - The Loam Wolf
Specs
| frameset | |
|---|---|
| Frame | ALX Trail 6061 Aluminum, 29" Wheels, UDH Compatible, All-New Brazed-In Cable Ports, Accessory Mount, One Piece Unibody Pivot Bridge, 135mm Travel, Direct Post-Mount Disc Brake, 148x12mm Boost Thru-Axle, Threaded BB, ISCG 05 Tabs, 34.9mm Seatpost Clamp |
| Headset | FSA No.57E, ZS 44/28.6 | ZS 56/40 |
| suspension | |
| Fork | Fox 34 Float Rhythm, 140mm travel, GRIP Damper, Rebound, Compression adjust, Tapered steerer, Boost 15x110mm, Kabolt, Post mount 180mm |
| Shock | Fox Float DPS Performance Series, EVOL LV, Rebound, 2-position lever, Metric 210x55mm, Hardware: M8x25mm (both sides) |
| drivetrain | |
| Rear derailleur | Shimano Deore RD-M7200-SGS, 12-Speed |
| Shifter | Shimano Deore SL-M6200-R, 12-Speed Trigger |
| Crank | Shimano Deore FC-M6200, 1x12-Speed |
| Chainring | 32T, Max Chainring: 34T |
| Cassette | Shimano Deore CS-M7200-12, 10–51T, 12-Speed, Micro Spline |
| Chain | KMC X-12 |
| brakes | |
| Front brake | Shimano BR-MT420, 4-Piston, Hydraulic Disc |
| Rear brake | Shimano BR-MT420, 4-Piston, Hydraulic Disc |
| Rotor | Shimano SM-RT54, 180mm, Center Lock |
| wheels | |
| Front hub | Shimano HB-TC500-15-B, 15x110mm Boost, 32H, Center Lock |
| Rear hub | Shimano FH-MT400-B, 12x148mm Boost, 32H, Center Lock, Microspline |
| Rim | Polygon MT6 Alloy, 29mm Internal Width, 32H, Hookless, Tubeless Tape Installed ** |
| Tyre | Maxxis Dissector 29×2.40″, Foldable, 60 TPI, 3C MaxxTerra Compound, EXO+ Protection, Tubeless Ready ** |
| Max tyre size | 29x2.60" |
| contact points | |
| Handlebar | Polygon Expert, 780mm Width, 30mm Rise, 9° Backsweep, 35mm Bar Bore |
| Grips | LINC Rubber, Black, 134 mm Length, Ø25 mm |
| Saddle | LINC Xtend, Cr-Mo Rails (Ø 7mm) |
| Seatpost | X-Fusion Manic LC Dropper, 150mm Travel (S, M) / 170mm Travel (L, XL), 30.9mm Diameter, 429mm (S, M) / 473mm (L, XL), Seatpost Clamp: 34.9mm Bolt Type |
| Stem | Polygon Expert, 35mm Extension, 0° Rise/Drop, 35mm Clamp |
| Pedals | Alloy Flat Pedals With Replaceable Pins |
| weight | |
| Bike weight | 32.85 lbs (size M, tubeless setup) |
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