Polygon Siskiu D5 Upgrades Review and Plans

I bought a 2021 Polygon Siskiu from Bikes Online in November of 2020 for $1,099.00 US. After some understandable shipping delays by FedEx, given the timing, I took delivery in December.

The Siskiu D5 is an aluminum framed bike, with a rear air shock and a front spring fork with lockout, both by SR Suntour. The bike has 27.5 inch wheels and tires, both by Polygon's house brand Entity. Brakes are Shimano M201s hydraulic units. All other components are Entity.

However, I can't leave will enough alone so I installed a TransX dropper post and ESI Super Chunky silicon grips (my favorites). I have an SR Suntour Epixon Epicon XC fork and a 1x10 conversion kit on the way.

I managed one ride before a Nor'easter closed all my local trails for the winter, except for fat tire bikes. That said, in that one ride it became apparent that the Siskiu D5 is a well built and decently spec'd bike. It is stable and responsive, and frankly, all kinds of fun to ride. I definitely give this bike two big thumbs up! Specifications are below.

Specifications

Costs
Initial Purchase $1,099.00 US w

Specifications
Frame: ALX XC 120mm travel (27.5”) Taper H/T QR boost
Fork: SR Suntour XCM HLO, QR 100mm, 120mm travel
Rear Shock: SR Suntour Raidon LO Air E2E:190X51mm
Handlebar: Entity Sport, alloy W:760mm R:12mm BB:31.8mm
Stem: Entity Sport, alloy E:45mm R:-DEG BB:31.8mm
Headset: ZS 44/28.6 | ZS 56/40
Saddle: Entity Void, steel rail
Seatpost: Entity Sport, 0mm offset, 30.9mmX350mm
Crankset: Shimano Altus FC-MT2102 boost 9SP 36X22T 170mm
Pedals PP flat pedal
Bottom Bracket: BSA threaded
Chain Guide: NA
Chain: KMC X9 9 speed
Cassette Sprocket: Shimano CS-HG200 9-speed 11-36T
Front Derailleur Shimano Alivio FD-M3120-E
Rear Derailleur: Shimano Alivio RD-M3100 9-speed
Shifting Lever: Shimano Alivio SL-M3100 9-speed
Brake Lever: Shimano BL-M201 hydraulic disc brake
Front Brake: Shimano BR-M201 hydraulic disc brake
Rear Brake: Shimano BR-M201 hydraulic disc brake
Rotor: Shimano SM-RT10 F:180mm / R:160mm
Tire: Entity Spiderbait 27.5”X2.25
Wheelset: alloy double wall rims (27.5”) w/alloy hubs

#PolygonSiskiu #BudgetMTB

[rickyization]

Hi, great videos, I have just purchased this bike but in a small frame, have you got any links for the dropper post ect, kind regards.

[HaydenPotter-mxml]

Is there an easier way you found to transfer the brake lines into the dual grommets other than disconnecting the brake lines completely? Thanks in advance!

[wolfmanj]

I'm getting the same bike...Could you do a video on how to install the dropper post? that would be amazing

[TomerBenDavid]

Is fork upgrade making the bike more comfortable or is it for a diffetent reason?

[justincase]

I love the n7 purple one so expensive this hobby

[justincase]

I have the same one i love it still gotta get a dp but im jelly about your seat i got and orange enity seat i wish i got the black seat one

[edgarmichaus]

what length did u got for the dropper?

[rileysmtbnetwork]

what is the diameter for the dropper post? There are so many TransX dropper posts.