Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bike
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bikes product image 2
Polygon Siskiu D6 - Mountain Bike [New] - dual suspension mountain bike product image 3
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bike product image 4
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bikes product image 5
Polygon Siskiu D6 - Mountain Bike [New] - dual suspension mountain bike product image 6
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bike product image 7
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bikes product image 8
Polygon Siskiu D6 - Mountain Bike [New] - dual suspension mountain bike product image 9
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bike product image 10
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bikes product image 11
Polygon Siskiu D6 - Mountain Bike [New] - dual suspension mountain bike product image 12
Polygon Siskiu D6 - Mountain Bike [New] - full suspension mountain bike product image 13

Details

YOUR RIDE - YOUR RULES

YOUR RIDE - YOUR RULES

The perfect full-suspension mountain bike for riders of all levels. Whether you're new to the sport or looking for a playful and efficient rig, the Siskiu D delivers. With 120mm of travel, a durable frame, and modern geometry, it handles everything from cross-country loops to flowy descents—providing a confident, fun ride for all.

VALUE MEETS PERFORMANCE

VALUE MEETS PERFORMANCE

The Siskiu D is designed to climb efficiently with its wide-range 1x drivetrain and balanced suspension platform. It comes equipped with a dropper post to boost maneuverability and confidence on the descents. With quality air suspension and updated componentry, the Siskiu D offers trail-ready performance without breaking the bank.

A TRUSTED BRAND

A TRUSTED BRAND

Polygon is a factory-direct brand with over 30 years of experience crafting high-performance bikes at competitive prices. Vertically integrated manufacturing ensures quality and cost savings. Their mountain bikes have been tested on the world stage at events like Red Bull Rampage and the World Cup circuit—plus, they back every frame with a 5-year warranty for peace of mind.

INDUSTRY REVIEWS

INDUSTRY REVIEWS

“Quality-spec brakes and drivetrain for price; good-looking; equipped with a dropper post” – BikeRadar

ONE-PIECE LINK
ONE-PIECE LINK Sometimes simple is better. The linkage-actuated single pivot provides active and progressive suspension for a supple feel on technical sections and a playful response on flow trails. The one-piece pivot bridge helps reduce frame flex and saves weight.
SUNTOUR SUSPENSION
SUNTOUR SUSPENSION The Suntour XCM 34 Boost fork and Raidon LO air shock offer 120mm of smooth travel. The fork includes adjustable rebound, lockout, and a wider 34mm chassis for added stiffness, while the rear shock provides air spring and lockout adjustment—tuned for your weight and riding style.
SHIMANO CUES 1X10 DRIVETRAIN
SHIMANO CUES 1X10 DRIVETRAIN The Shimano CUES 1x10 drivetrain offers crisp shifting and a wide 11-48T cassette, giving you the range to power up climbs and flow through flats. The direct-mount rear derailleur helps improve shifting precision and chain retention in rough terrain.
TRANZX DROPPER POST
TRANZX DROPPER POST The TranzX dropper post comes stock with 150mm of travel on medium frames and 170mm on larger sizes, helping you stay agile and in control on technical descents and switchbacks.
SHIMANO HYDRAULIC DISC BRAKES
SHIMANO HYDRAULIC DISC BRAKES Shimano MT200 hydraulic disc brakes deliver consistent stopping power with minimal maintenance, so you can ride with confidence across changing conditions and trail types.
Any questions? Chat to our friendly team
Specs
frameset
FrameALX XC Trail Alloy, Internal Cable Routing, Tapered Head Tube, Boost 148mm, BSA 73mm
HeadsetThreadless Zero Stack, ZS44/28.6 | ZS56/30
suspension
ForkSR Suntour XCM34 Boost, 120mm Travel, Tapered Steerer, Preload Adjust, Lockout, Rebound Adjust, 15x110mm Thru Axle
ShockSR Suntour Raidon LO Air, 190x45mm Metric, Lockout, M8x25mm Hardware
drivetrain
Rear derailleurShimano CUES RD-U6000, Direct Attach, 10/11-Speed Compatible
ShifterShimano CUES SL-U6000, 10-Speed Trigger
CrankShimano CUES FC-U6000-1, Two-Piece, 170mm
Chainring32T Narrow-Wide (Max compatibility: Single 38T / Double 36/24T)
CassetteShimano CUES CS-LG300, 11–48T, 10-Speed
ChainKMC X Glide, 10-Speed
brakes
Front brakeShimano BR-MT200, 2-Piston Hydraulic Disc
Rear brakeShimano BR-MT200, 2-Piston Hydraulic Disc
RotorShimano SM-RT10, Centre Lock Front: 180mm / Rear: 160mm
wheels
Front hubShimano HB-TC500, 15x110mm Thru Axle, 32H, Centre Lock
Rear hubShimano FH-TC500, 12x148mm Thru Axle, 32H, Centre Lock
RimPolygon MT6 Alloy Double Wall, 30mm Internal Width, 32H, 27.5"/29" Tubeless Ready with Tape
Tyre27.5/29" x 2.25"
contact points
HandlebarPolygon Sport Alloy, 760mm Width, 31.8mm Clamp, 12mm Rise, 9° Backsweep
GripsLock-on Ergonomic Grips, 31.8 mm
SaddleLINC Void Saddle, 7mm Rails
SeatpostTranzX JD-YSP23KL Dropper Travel: 125mm (S), 150mm (M), 170mm (L/XL) Diameter: 30.9mm, Length: 456mm
StemPolygon Sport Alloy, 45mm Extension, 31.8mm Clamp, 0° Rise
PedalsPP Platform Pedals
weight
Bike weight35 lb ( Size L)
Geo

  S(27.5) M(27.5) M(29) L(29) XL(29)
Height (cm) 5'1–5'6 5'6–5'10 5'7–5'11 5'11–6'2 6'2–6'5
(A) Stack 571.2 580.4 606.7 615.9 625.2
(B) Reach 425 445 445 465 485
(C) Head Tube Angle 67° 67° 67° 67° 67°
(D) Head Tube Length 102 105 102 112 122
(E) Seat Tube Angle 70° 70° 68° 68° 68°
Seat Tube Angle Effective 75° 75° 76° 76° 76°
(F) Seat Tube Length 395 435 435 487 522
(G) Top Tube Effective 572 595 603 624 646
(H) Bottom Bracket Height 326 326 326 326 326
(I) Bottom Bracket Offset 27 27 47 47 47
(J) Chainstay 432 432 436 436 436
(K) Wheel Base 1133 1157 1165 1189 1213
(L) Standover Height 571.2 580.4 606.7 615.9 625.2
Handle Bar Width 760 760 760 760 760
Stem Length 45 45 45 45 45
Crank Length 170 170 170 170 170
Front Travel 120 120 120 120 120
Rear Travel 120 120 120 120 120
Dropper Travel 125 150 150 170 170
Maximum Tyre size 27.5"x2.25" / 29"x2.25"
Maximum Chainring Size Single 38T, Double 36/24T
Build

Assembly Video- Polygon Siskiu D6 SE

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.

  1. Unboxing Your Polygon Siskiu D6 SE

  2. Dial In Your Suspension Setup

  3. Dial In Your Bike Fit

  4. Dial In Your Tyre Pressures

  5. Pre-Ride Check