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Mountain
Polygon

Siskiu D5

AluminiumMountain
$1,399.99
RRP AUD (BikesOnline)
AluminiumFrame
DiscBrakes

OverviewAbout the Polygon Siskiu D5

The Polygon Siskiu D5 is a mountain bike, built on a aluminium frame, listed at $1,399.99. An off-road bike for trails, with grippy tyres and trail-ready geometry.

aluminiumdisc brakefull suspensiontrail

SpecificationsWhat we know

Brand
Polygon
Category
Mountain
Frame
Aluminium
Brakes
Disc
Price
$1,399.99 (RRP AUD (BikesOnline))

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
580.4 mm
Reach
445 mm
Stack/reach
1.30
Head angle
67 deg
Seat angle
75.5 deg
Wheelbase
1157 mm
Chainstay
432 mm
BB drop
27 mm
Standover
696 mm

GearingRatios

0.02lowest (climbing)
0.09highest (speed)
Very low climbing gear

Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.

Drivetrain & buildFull specification

Groupset
Shimano
Shifting
Mechanical
Drive
1x
Speeds
9
Crank
32T
Chainrings
1
Cassette
Shimano, 11-46T
Rear derailleur
Shimano, Direct Attach
Brakes
Shimano MT200 Hydraulic Disc
Rotors
180mm front, 160mm rear, Center-Lock
Wheelset
Alloy Double Wall
Stock tyre
27.5x2.25
BB standard
BSA Threaded, 68/73mm
Thru-axle
QR 100mm front, Boost QR 141mm rear
Seatpost
Entity Sport Alloy, 30.9x350mm
Cockpit
Polygon Sport Alloy handlebar and stem
Saddle
Void Saddle

SuspensionMTB detail

Front travel
120 mm
Rear travel
120 mm
Fork
SR Suntour XCM
Shock
SR Suntour Raidon LO Air
Wheel config
27.5
Discipline
XC

Bike DNAWhat the numbers say

Steering
A 67 deg head angle points to balanced trail handling.
Climbing
Lowest ratio 0.02 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 (polygonbikes.com product page), verified 2026-09-04. This is a specification analysis, not a physical ride review.

Where to buyStockist

bikesonline.com.au
Listed in Australia
$1,399.99
View →

BikeFinder is an independent directory. We link to retailers; the price shown is last seen and set by the seller.