Siskiu T9
OverviewAbout the Polygon Siskiu T9
The Polygon Siskiu T9 is a mountain bike, built on an aluminium frame, listed at $3,499.99 to $4,599.99 at BikesOnline. An off-road bike for trails, with grippy tyres and trail-ready geometry.
How it comparesThe Siskiu T9 against similarly priced bikes
- At $3,499.99 it costs less than 53% of the 223 mountain bikes we list.
- Head angle: 65.0 degrees, about the same as similarly priced full-suspension mountain bikes (middle 65.0 degrees).
- Front travel: 140 mm, less than the middle of similarly priced full-suspension mountain bikes (150 mm).
- Rear travel: 135 mm, about the same as similarly priced full-suspension mountain bikes (middle 140 mm).
- Reach (size M): 465 mm, about the same as similarly priced full-suspension mountain bikes (middle 460 mm).
- Lowest gear ratio: 0.63, about the same as similarly priced full-suspension mountain bikes (middle 0.63).
- Gears at the back: 12-speed, about the same as similarly priced full-suspension mountain bikes (middle 12-speed).
Closest alternatives on price
same price · 170 mm fork vs 140 mm
same price · 120 mm fork vs 140 mm
same price · 150 mm fork vs 140 mm
$100 more · 160 mm fork vs 140 mm
Compare the Siskiu T9 with the two closest side by side
Compared with the 31 similar mountain bikes on BikeFinder priced $2,450 to $4,700, using each bike's published specs and the price shown on its page.
SizingWhat size Siskiu T9 do I need?
Enter your height to see the size Polygon recommends.
| Size | Rider height | In feet |
|---|---|---|
| S | 158 to 168 cm | 5 ft 2 in to 5 ft 6 in |
| M | 168 to 178 cm | 5 ft 6 in to 5 ft 10 in |
| L | 177 to 185 cm | 5 ft 10 in to 6 ft 1 in |
| XL | 185 to 195 cm | 6 ft 1 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
- Model year
- 2026
- Category
- Mountain
- Frame
- Aluminium
- Wheel size
- 29-inch
- Drivetrain
- Shimano Deore XT 1x12
- Brakes
- Disc
- Frame sizes
- S, M, L, XL
- Price
- $3,499.99 to $4,599.99 at BikesOnline. 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
- Stack
- 609 mm
- Reach
- 465 mm
- Stack/reach
- 1.31
- Head angle
- 65 deg
- Seat angle
- 77 deg
- Wheelbase
- 1214 mm
- Chainstay
- 430 mm
- BB drop
- 39 mm
- Standover
- 705 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Shimano Deore XT
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 12
- Crank
- Red: Shimano Deore FC-M6120-1 Boost, 165mm Crank Arm, BSA Threaded | Black: Shimano Deore FC-M6200 Boost, 165mm Crank Arm, BSA Threaded
- Chainrings
- 32
- Cassette
- Red: Shimano Deore CS-M6100-12, 10-51T, Micro Spline | Black: Shimano Deore CS-M7200-12, 10-51T, Micro Spline
- Rear derailleur
- Red: Shimano SLX RD-M7100-SGS, 12-Speed | Black: Shimano Deore RD-M7200-SGS, 12-Speed
- Brakes
- Red: Shimano BR-M6120, 4-Piston Caliper | Black: Shimano Deore BR-M6220, 4-Piston Caliper
- Rotors
- 203/180mm
- Wheelset
- Polygon MT6 29", 32H, 29mm inner width, Tubeless Ready
- Rim internal width
- 29 mm
- Stock tyre
- 29x2.50 / 29x2.40
- Seatpost
- Tranz X JD-YSP23KL Dropper Post, 30.9mm, 150mm Travel (S, M) / 170mm Travel (L, XL), Shimano SL-MT500-IL, Dropper Post Remote Lever, I-Spec EV Compatible
- Cockpit
- Polygon Expert, Alloy, 35mm Extension, 35mm Clamping Diameter, 0 deg Rise / Polygon Expert, Alloy, 780mm Width, 35mm Bar Bore, 30mm Rise
- Saddle
- Fizik Terra Alpaca X5, S-Alloy Mobius Rail
- UDH
- Yes
SuspensionMTB detail
- Front travel
- 140 mm
- Rear travel
- 135 mm
- Fork
- Fox 36 Float Performance Series
- Fork stanchions
- 36 mm
- Shock
- Fox Float X Performance Series
- Wheel config
- 29
- Dropper
- Tranz X JD-YSP23KL Dropper Post
- Dropper travel
- 150 mm
- Discipline
- Trail
- Suspension
- full suspension
Bike DNAWhat the numbers say
- Steering
- A 65 deg head angle points to slack, trail and enduro handling.
- Climbing
- Lowest ratio 0.63 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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