Bicycle Archive · Specification report

2025 Polygon Siskiu D7

Velopedia Archive ID 900001804

Overview

Model year	2025
Brand	Polygon
Model	SISKIU D7
Bicycle type	Mountain
Archive ID	900001804
Original MSRP	$1,499.00
Colors	Blue White; Green Black
Sizes	27.5” SM; 27.5” MD; 29” MD; 29” LG; 29” XL

Frameset

Frame construction	ALX XC Trail Frame
Frame material	Aluminum
Fork	RockShox Recon Silver RL 120mm Travel
Rear shock	RockShox Deluxe Select Plus E2E: 190x45mm

Drivetrain

Shifters	Shimano 1X11-Speed Trigger
Rear derailleur	Shimano 11-speed
Crankset	170mm, 32T
Bottom bracket	Threaded 68/73mm
Cassette	Shimano 11-50T
Chain	KMC Chain
Pedals	Alloy Cage Pedal W/ Reflector

Brakes

Brakes	Shimano Hydraulic Disc; Levers: Shimano Lever; Rotors: Rotor: Front:180mm Rear:160mm Center-Lock

Cockpit & contact points

Headset	Threadless Zero Stack Headset, ZS 44/28.6 \| ZS 56/40
Handlebar	Polygon Xpert, Alloy
Stem	Polygon Xpert, Alloy
Saddle	Linc Void Saddle
Seatpost	Tranz X Dropper 150mm

Wheels & tires

Hubs	F: Shimano HB-MT400 Thru Axle 15x100mm 32H Center Lock / R: Shimano FH-MT400 Thru Axle 12x148mm 32H Center Lock
Wheels	Alloy Double Wall
Rims	Alloy Double Wall 584 / 622-30 32H for Tyre 584 / 622-54/76
Front tire	Performance Tire 27.5"X2.25" / 29"X2.25"
Rear tire	Performance Tire 27.5"X2.25" / 29"X2.25"

Geometry · S (27.5″)

Seat tube	395 mm
Effective top tube	572.7 mm
Head tube	102 mm
Head-tube angle	67°
Seat-tube angle	75.5°
Actual seat-tube angle	70°
Chainstay / rear center	432 mm
Wheelbase	1133 mm
Bottom-bracket drop	27 mm
Bottom-bracket height	326 mm
Reach	425 mm
Stack	571.2 mm
Standover height	676 mm

Geometry · M (27.5″)

Seat tube	435 mm
Effective top tube	595.1 mm
Head tube	105 mm
Head-tube angle	67°
Seat-tube angle	75.5°
Actual seat-tube angle	70°
Chainstay / rear center	432 mm
Wheelbase	1157 mm
Bottom-bracket drop	27 mm
Bottom-bracket height	326 mm
Reach	445 mm
Stack	580.4 mm
Standover height	696 mm

Geometry · M (29″)

Seat tube	435 mm
Effective top tube	603.9 mm
Head tube	102 mm
Head-tube angle	67.5°
Seat-tube angle	76°
Actual seat-tube angle	68.7°
Chainstay / rear center	436 mm
Wheelbase	1165 mm
Bottom-bracket drop	47 mm
Bottom-bracket height	326 mm
Reach	445 mm
Stack	606.7 mm
Standover height	698 mm

Geometry · L (29″)

Seat tube	487 mm
Effective top tube	624.3 mm
Head tube	112 mm
Head-tube angle	67.5°
Seat-tube angle	76°
Actual seat-tube angle	68.7°
Chainstay / rear center	436 mm
Wheelbase	1189 mm
Bottom-bracket drop	47 mm
Bottom-bracket height	326 mm
Reach	465 mm
Stack	615.9 mm
Standover height	733 mm

Geometry · XL (29″)

Seat tube	522 mm
Effective top tube	646.7 mm
Head tube	122 mm
Head-tube angle	67.5°
Seat-tube angle	76°
Actual seat-tube angle	68.7°
Chainstay / rear center	436 mm
Wheelbase	1213 mm
Bottom-bracket drop	47 mm
Bottom-bracket height	326 mm
Reach	485 mm
Stack	625.2 mm
Standover height	761 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 14, 2026.