Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bike
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Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bikes product image 8
Polygon Siskiu D5 - Mountain Bike [New] - dual suspension mountain bike product image 9
Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bike product image 10
Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bikes product image 11
Polygon Siskiu D5 - Mountain Bike [New] - dual suspension mountain bike product image 12
Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bike product image 13
Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bikes product image 14
Polygon Siskiu D5 - Mountain Bike [New] - dual suspension mountain bike product image 15
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Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bikes product image 17
Polygon Siskiu D5 - Mountain Bike [New] - dual suspension mountain bike product image 18
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Polygon Siskiu D5 - Mountain Bike [New] - full suspension mountain bikes product image 20

Details

THE SMART UPGRADE

THE SMART UPGRADE

The Siskiu D5 returns with key upgrades, cementing its place as the ideal entry into full-suspension mountain biking. It’s engineered to build confidence on the trail, helping you progress your skills on everything from flowing singletrack to more technical terrain. The D5 is more than just a bike; it's a capable partner for trail adventures, designed to grow with you as you explore the world of mountain biking.

SHRED WITHOUT THE SPEND

SHRED WITHOUT THE SPEND

The All New Siskiu D5's modern trail geometry creates a stable and confident ride for all skill levels. It's smartly equipped with a durable 1x drivetrain for simple shifting and tubeless-ready rims for future upgrades. This careful selection of components delivers performance that punches well above its price tag, making the D5 the smartest entry into full-suspension.

BALANCED SUSPENSION

BALANCED SUSPENSION

The Siskiu D5's balanced suspension gives you the best of both worlds. Up front, a durable 120mm coil fork with a hydraulic lockout ensures climbing efficiency. In the rear, a tunable air shock lets you customize the ride to your weight and style, providing superior traction and comfort on any trail.

SR SUNTOUR XCM32
SR SUNTOUR XCM32 The SR Suntour XCM32 is a robust and reliable fork ready for real trail duty. It delivers 120mm of smooth travel via a durable coil spring, absorbing rocks and roots with ease. Stiff 32mm stanchions ensure precise steering, while a simple hydraulic lockout lever maximizes pedaling efficiency on climbs.
SR SUNTOUR RAIDON
SR SUNTOUR RAIDON A standout feature on the Siskiu D5, the SR Suntour Raidon is a lightweight and highly tunable air shock. It allows you to precisely set the pressure to match your body weight and riding style, creating a custom-tuned feel. The lockout switch provides a firm pedaling platform for efficiency.
SHIMANO CUES 1x9 DRIVETRAIN
SHIMANO CUES 1x9 DRIVETRAIN The Siskiu D5 is equipped with Shimano’s innovative CUES drivetrain. Engineered for exceptional durability and long-lasting smooth performance, this 1x9 system simplifies shifting and enhances chain stability on rough terrain. The wide-range 11-46T cassette ensures you have the perfect gear for steep climbs and fast descents.
SHIMANO MT200 HYDRAULIC BRAKES
SHIMANO MT200 HYDRAULIC BRAKES Providing reliable stopping power in all conditions, the Shimano BR-MT200 hydraulic disc brakes are a benchmark for performance and control. The 2-piston caliper design offers excellent modulation for fine-tuned speed adjustments, while a larger 180mm front rotor provides extra power for confident braking on steep descents.
TUBELESS READY WHEELS
TUBELESS READY WHEELS The Siskiu D5 rolls on durable, double-wall alloy rims that are tubeless-ready, offering a significant future upgrade path. Converting to tubeless allows for lower tire pressures, increasing traction and reducing punctures. The wheels are wrapped in grippy WTB Trail Boss Comp tires for confident cornering and control.
Any questions? Chat to our friendly team
Specs
frameset
FrameALX XC Trail 6061 Aluminum Frame, One-Piece Linkage Suspension Platform 120mm Travel, Internal Cable Routing, Direct Post-Mount Disc Brake, 141mm BOOST QR, 73mm Threaded BB
HeadsetThreadless Zero Stack, SHIS: ZS 44/28.6 | ZS 56/30
suspension
ForkSR Suntour XCM32, 120mm Travel, Preload Adjuster, Hydraulic Lockout, Tapered Steerer, QRx100mm
ShockSR Suntour Raidon LO Air, 120mm Travel, Air Spring, Lockout, E2E: 190x51mm, Hardware: M8x22mm
drivetrain
Rear derailleurShimano CUES RD-U4000, Direct Mount, 9-Speed
ShifterShimano CUES SL-U4000, 9-Speed Trigger
CrankProwheel RMZ-MD25S-TT, Two-Piece Crank, 170mm
Chainring32T
CassetteShimano CUES CS-LG300, 9-Speed, 11-46T
ChainKMC X Series, 9-Speed
brakes
Front brakeShimano BR-MT200, 2-Piston Caliper, Hydraulic Disc
Rear brakeShimano BR-MT200, 2-Piston Caliper, Hydraulic Disc
RotorShimano SM-RT10, F:180mm / R:160mm, Center-Lock
wheels
Front hubJoytech D761DSE, QRx100mm, 32H, Center-Lock
Rear hubJoytech D142TSE, QRx141mm, 32H, Center-Lock, For Cassette Sprocket
RimPolygon MT6, Alloy Double Wall, 32H, 23.3mm Inner Width, Tubeless Ready **
TyreWTB Trail Boss Comp, 27.5” x 2.25”
Max tyre size27.5” x 2.25”
contact points
HandlebarPolygon Sport Alloy, 31.8mm Clamp, 760mm Width, 20mm Rise, 9° Back Sweep
SaddleLinc Void Saddle, ø7mm Rails
SeatpostPolygon Sport Alloy, 30.9 x 350mm, 0mm Offset
StemPolygon Sport Alloy, 45mm Length, 31.8mm Clamp, 0° Rise
weight
Bike weight37lbs (Size L)
Geo

* All lengths in mm

  S M L
Height (cm) 5'1"–5'6" 5'6"–5'10" 5'10"–6'1"
(A) Stack 571 580 589
(B) Reach 425 445 465
(C) Head Tube Angle 67° 67° 67°
(D) Head Tube Length 102 105 122
(E) Seat Tube Angle 70° 70° 68°
Seat Tube Angle 70° 70° 70°
(F) Seat Tube Length 395 435 485
(G) Top Tube Effective 572 595 617
(H) Bottom Bracket Height 326 326 326
(I) Bottom Bracket Offset 27 27 27
(J) Chainstay 432 432 432
(K) Wheel Base 1133 1157 1181
(L) Standover Height 676 696 729
Handle Bar Width 760 760 760
Stem Length 45 45 45
Crank Length 170 170 170
Front Travel 120 120 120
Rear Travel 120 120 120
Build

Polygon Siskiu D5 Assembly Video

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 D5

  2. Dial In Your Suspension Setup

  3. Dial In Your Bike Fit

  4. Dial In Your Tyre Pressures

  5. Pre-Ride Check