ALX frame
A light, hydroformed ALX alloy frame made in Polygon's own factory.

Real full suspension at a friendly price
Siskiu DSE is the special edition of the Siskiu D range: RockShox Deluxe Select+ shock, SR Suntour Raidon 32 fork, Shimano Deore 11-speed drivetrain and a 150/170mm dropper seatpost.
Versions in the Siskiu D range: SISKIU D7 · SISKIU DSE · SISKIU D6 · SISKIU D5

A light, hydroformed ALX alloy frame made in Polygon's own factory.
Shadow+ technology keeps the chain secure and running quietly so you can focus on the trail ahead.
Essential for modern MTB — drop the saddle quickly on descents for more confidence going downhill.



Specifications may change between shipments. Please contact Spinlab to confirm the bike's configuration in Vietnam.
| Specifications | S | M | L | XL |
|---|---|---|---|---|
| Height | 155-165 | 165-175 | 175-185 | 185-195 |
| Seat Tube Length (A) | 395 | 435 | 487 | 522 |
| Seat Tube Angle (B) | 68.7 | 68.7 | 68.7 | 68.7 |
| Effective Seat Tube Angle (C) | 75.5 | 76 | 76 | 76 |
| Head Tube Length (D) | 90 | 102 | 112 | 122 |
| Head Tube Angle (E) | 67.5 | 67.5 | 67.5 | 67.5 |
| Effective Top Tube (F) | 579.5 | 603.9 | 624.3 | 646.7 |
| BB Height (G) | 330 | 326 | 326 | 326 |
| BB Drop (H) | 46 | 47 | 47 | 47 |
| Chainstay Length (I) | 435 | 436 | 436 | 436 |
| Wheelbase (J) | 1141.2 | 1165 | 1189 | 1213 |
| Reach (K) | 425 | 445 | 465 | 485 |
| Stack (L) | 597.4 | 606.7 | 615.9 | 625.2 |
| Standover Height (M) | 672 | 698 | 733 | 761 |
The selected size column is highlighted. Figures from Polygon Bikes.
Refer to the “Rider height” row in the Frame geometry table. If your height falls between two sizes, contact Spinlab for advice based on your riding position and needs.
Genuine Polygon bikes distributed by Spinlab are covered by Polygon's warranty policy. Call our hotline for details of conditions and duration.
Yes. Contact Spinlab for advice on suitable upgrades, such as Vittoria tyres or Emume handlebar tape.