Siskiu D6
OverviewAbout the Polygon Siskiu D6
The Polygon Siskiu D6 is a mountain bike, built on an aluminium frame, listed at $1,749.99 at BikesOnline. An off-road bike for trails, with grippy tyres and trail-ready geometry.
How it comparesThe Siskiu D6 against similarly priced bikes
- At $1,749.99 it costs less than 74% of the 223 mountain bikes we list.
- Head angle: 67.0 degrees, about the same as similarly priced full-suspension mountain bikes (middle 66.5 degrees).
- Front travel: 120 mm, less than the middle of similarly priced full-suspension mountain bikes (130 mm).
- Rear travel: 120 mm, about the same as similarly priced full-suspension mountain bikes (middle 120 mm).
- Lowest gear ratio: 0.50, lower (easier on steep climbs) than the middle of similarly priced full-suspension mountain bikes (0.65).
- Gears at the back: 11-speed, more than the middle of similarly priced full-suspension mountain bikes (10-speed).
- Stock tyre width: 57 mm, narrower than the middle of similarly priced full-suspension mountain bikes (61 mm).
Closest alternatives on price
$150 more · 12-speed vs 11-speed · 130 mm fork vs 120 mm
$249 more · 10-speed vs 11-speed · 140 mm fork vs 120 mm
$250 more · 10-speed vs 11-speed · 150 mm fork vs 120 mm
$350 less · 9-speed vs 11-speed
Compare the Siskiu D6 with the two closest side by side
Compared with the 8 similar mountain bikes on BikeFinder priced $1,200 to $2,350, using each bike's published specs and the price shown on its page.
SizingWhat size Siskiu D6 do I need?
Enter your height to see the size Polygon recommends.
| Size | Rider height | In feet |
|---|---|---|
| S(27.5) | 155 to 168 cm | 5 ft 1 in to 5 ft 6 in |
| M(27.5) | 168 to 178 cm | 5 ft 6 in to 5 ft 10 in |
| M(29) | 170 to 180 cm | 5 ft 7 in to 5 ft 11 in |
| L(29) | 180 to 188 cm | 5 ft 11 in to 6 ft 2 in |
| XL(29) | 188 to 196 cm | 6 ft 2 in to 6 ft 5 in |
Rider heights from Polygon's size chart. Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Polygon
- Category
- Mountain
- Frame
- Aluminium
- Wheel size
- 29-inch (27.5-inch on the smaller sizes)
- Drivetrain
- Shimano CUES 2x11
- Brakes
- Disc
- Frame sizes
- S(27.5), M(27.5), M(29), L(29), XL(29)
- Price
- $1,749.99 at BikesOnline, was $1,999.99. In stock, checked 3 Nov 2026.
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M (29 inch)
- Stack
- 606.7 mm
- Reach
- 445 mm
- Stack/reach
- 1.36
- Head angle
- 67 deg
- Seat angle
- 76 deg
- Wheelbase
- 1165 mm
- Chainstay
- 436 mm
- BB drop
- 47 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Shimano CUES
- Shifting
- Mechanical
- Drive
- 2x
- Speeds
- 11
- Crank
- Shimano CUES FC-U6000-1, Two-Piece, 170mm
- Chainrings
- 36/24
- Cassette
- Shimano CUES CS-LG300, 11 to 48T, 10-Speed
- Rear derailleur
- Shimano CUES RD-U6000, Direct Attach, 10/11-Speed Compatible, w/ Clutch
- Brakes
- Shimano BR-MT200, 2-Piston Hydraulic Disc
- Rotors
- 180/160mm
- Wheelset
- Polygon MT6 Alloy Double Wall, 30mm Internal Width, 32H, 27.5"/29" Tubeless Ready with Tape
- Rim internal width
- 30 mm
- Stock tyre
- 29x2.25
- BB standard
- BSA threaded
- Seatpost
- TranzX JD-YSP23KL Dropper Travel: 125mm (S), 150mm (M), 170mm (L/XL) Diameter: 30.9mm, Length: 456mm
- Cockpit
- Polygon Sport Alloy, 45mm Extension, 31.8mm Clamp, 0 deg Rise / Polygon Sport Alloy, 760mm Width, 31.8mm Clamp, 12mm Rise, 9 deg Backsweep
- Saddle
- LINC Void Saddle, 7mm Rails
SuspensionMTB detail
- Front travel
- 120 mm
- Rear travel
- 120 mm
- Fork
- SR Suntour XCM34 Boost
- Shock
- SR Suntour Raidon LO Air
- Wheel config
- 29
- Dropper
- TranzX JD-YSP23KL Dropper Travel: 125mm (S)
- Dropper travel
- 150 mm
- Discipline
- Trail
- Suspension
- full suspension
Bike DNAWhat the numbers say
- Steering
- A 67 deg head angle points to balanced trail handling.
- Climbing
- Lowest ratio 0.5 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (BikesOnline product page (specification list and geometry table)), verified 2026-11-03. This is a specification analysis, not a physical ride review.
Where to buyStockist
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