Siskiu T27 EVO
OverviewAbout the Polygon Siskiu T27 EVO
The Polygon Siskiu T27 EVO is a mountain bike, built on an aluminium frame, listed at $2,599.99 at BikesOnline. An off-road bike for trails, with grippy tyres and trail-ready geometry.
How it comparesThe Siskiu T27 EVO against similarly priced bikes
- At $2,599.99 it costs less than 60% of the 234 mountain bikes we list.
- Head angle: 65.0 degrees, about the same as similarly priced full-suspension mountain bikes (middle 65.5 degrees).
- Front travel: 150 mm, more than the middle of similarly priced full-suspension mountain bikes (140 mm).
- Rear travel: 140 mm, about the same as similarly priced full-suspension mountain bikes (middle 135 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).
- Stock tyre width: 61 mm, about the same as similarly priced full-suspension mountain bikes (middle 61 mm).
Closest alternatives on price
$22 more · 11-speed vs 12-speed
$50 less · 11-speed vs 12-speed
$100 less · 140 mm fork vs 150 mm
$100 more · 11-speed vs 12-speed · 160 mm fork vs 150 mm
Compare the Siskiu T27 EVO with the two closest side by side
Compared with the 25 similar mountain bikes on BikeFinder priced $1,800 to $3,500, using each bike's published specs and the price shown on its page.
SizingWhat size Siskiu T27 EVO do I need?
Enter your height to see the size Polygon recommends.
| Size | Rider height | In feet |
|---|---|---|
| XS (27.5") | 150 to 160 cm | 4 ft 11 in to 5 ft 3 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
- 27.5-inch
- Drivetrain
- Shimano Deore 1x12
- Brakes
- Disc
- Frame sizes
- XS (27.5")
- Price
- $2,599.99 at BikesOnline, was $3,099.99. 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 XS (27.5")
- Stack
- 578.9 mm
- Reach
- 420 mm
- Stack/reach
- 1.38
- Head angle
- 65 deg
- Seat angle
- 76.5 deg
- Wheelbase
- 1146.4 mm
- Chainstay
- 425 mm
- BB drop
- 20 mm
- Standover
- 666 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
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 12
- Crank
- Shimano FC-M6120-1 Boost, 32T, 165mm Crank Arm
- Chainrings
- 32
- Cassette
- Shimano Deore CS-M6100-12, 10-51T, MicroSpline
- Rear derailleur
- Shimano Deore RD-M6100-SGS, 12-Speed, Direct Attach
- Brakes
- Shimano MT420 Hydraulic Disc, 4-Piston
- Rotors
- 180mm
- Wheelset
- Polygon MT6 Alloy, 29mm Internal Width, Sapim Leader Spokes, 32H, Tubeless Tape Installed
- Rim internal width
- 29 mm
- Stock tyre
- 27.5x2.40
- Tubeless
- Yes
- BB standard
- Threaded
- Seatpost
- X-Fusion Manic LC Dropper Post, 100mm Travel, 30.9x314 mm, 0 mm Offset, 34.9 mm Bolt-Type Clamp
- Cockpit
- Polygon Expert Alloy, 35 mm Length, 35 mm Clamp, 0 deg Rise / Polygon Expert Alloy, 720 mm Width, 35 mm Clamp, 30 mm Rise, 9 deg Backsweep
- Saddle
- Fizik Terra Alpaca X5, S-Alloy Mobius 7 mm Rails
SuspensionMTB detail
- Front travel
- 150 mm
- Rear travel
- 140 mm
- Fork
- RockShox Recon Silver RL
- Shock
- RockShox Deluxe Select Plus
- Wheel config
- 27.5
- Dropper
- X-Fusion Manic LC 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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