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2019 Polygon

Siskiu D5

A 27.5″ aluminum frame full suspension trail bike with mid-range components.

Manufacturer Price

$899
Weight33.2 lbs  
FrameAluminum
SuspensionFull, 120 / 120mm
ForkSuntour XCM
ShockSuntour
Wheels27.5″ Aluminum
Drivetrain3 × 9
GroupsetAlivio
BrakesShimano Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Siskiu D5
Other Trail bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

30 mph

Siskiu D5

26 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

None yet.

Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.

Reviews
Loam Wolf
Review: Polygon Siskiu T8

Dec 2020

POLYGON SISKIU T8 REVIEW TESTING THEN UPGRADING A BUDGET-MINDED BIKE The Polygon Siskiu T series bikes are some of the best looking, affordable dual suspension mountain bikes on the market and we get lots of questions about them. Several months back we actually made a really

Read Review

Outdoor Gear Lab
Polygon Siskiu T8

Nov 2020 · Jeremy Benson

The Polygon Siskiu T8 is an excellent mid-travel trail bike offered at a reasonable price. Polygon's consumer-direct sales model helps keep it affordable...

Highs
  • Awesome build for the price

  • Versatile

  • Well-rounded performance

Lows
  • Firm grips

  • Saddle shape

Read Review

Bikerumor
New Polygon Siskiu T gets the right updates for seriously competitive & affordable trail bike

Aug 2020 · Zach Overholt

Looking for a full suspension mountain bike you can actually afford? The Polygon Siskiu T just got overhauled, and it looks good.

Read Review

NSMB
Polygon Siskiu N9 29er - First Impressions

Nov 2019

The Polygon Siskiu N9 29er boasts an SRAM GX drivetrain, Fox suspension, good tires, solid geometry, and a nicely manufactured 160mm travel aluminum frame for 2800 USD.

Read Review

Flow Mountain Bike
Tested: Polygon Siskiu N9 2019

Nov 2018

What makes this bike special? It’s not just the price, though at $3699, this one is hard to beat. Even when stacked up against other direct-to-the-consumer brands like YT, this bike holds its own in sheer value for money terms. The frameset is far from revolutionary, all aluminium, with a simple faux-bar suspension system. But …

Highs
  • Smart component choices.

  • Great fork and shock.

  • Geometry that most riders will feel instantly comfortable with.

  • The price, obviously!

Lows
  • Short travel dropper post.

  • No water bottle mount.

Read Review

Pinkbike
Review: Polygon Siskiu T8

Sep 2018 · Richard Cunningham

Add this well-outfitted and sharp-handling 29er to your short list of affordable trail bikes.

Highs
  • Lively acceleration and climbing

  • Precise handling and cornering

  • Excellent value

Lows
  • No room for a water bottle

  • Not plush in rough terrain

  • No size small with 29-inch wheels

Read Review

MBR
Polygon Siskiu D5 review - MBR

Aug 2018 · Alan Muldoon

Yes, the Polygon Siskiu D5 frame is top-notch but the parts spec is lacking. If it was £750 it'd be a steal but it's outclassed by other £1k full sussers.

Highs
  • Super sleek frame design.

Lows
  • No rebound adjustment on shock.

Read Review

BikeRadar
Polygon Siskiu T8 review

Jun 2018 · Russell Eich

Polygon's Siskiu T8 is a fun example of a lower-cost trail bike that's ready to rip

Read Review

Geometry
Specs
Build
Frame

Aluminum

BB StandardBSA, 73mm, Threaded

Fork

SR Suntour XCM HLO, standard steerer

Travel120mm

Spring TypeCoil

Shock

SR Suntour Raidon LO, air, 190x51mm, m8x22mm hardware

Travel120mm

Bottom Bracket

Integrated BSA

Headset

FSA NO.57B-1, taper ID:44/56mm

Stem

Entity Xpert, alloy, 80mm

Handlebar

Entity Xpert, alloy, 740mm

Saddle

Entity Assault with Cr-Mo rails

Seatpost

Entity Xpert, alloy, 350mm

TypeRigid

Pedals

VP Component VP-195E, alloy

Groupset
Rear Derailleur

Shimano Alivio RD-M4000

Front Derailleur

Shimano Alivio FD-M4000

Crank

2 Piece, 170mm (S/M), 175mm (L/XL)

Shifters

Shimano Alivio SL-M4000

Cassette

Shimano CS-HG200, 9-speed, 11-34 tooth

Chain

KMC X-9

Chain Guide

None

Brakes

Shimano M315

TypeShimano Hydraulic Disc

Brake Levers

Shimano M315

Wheels
Rims

Araya DM-650

Spokes

Stainless steel

Front Hub

Shimano RM33

Rear Hub

Shimano RM33

Tires

Schwalbe Smart Sam, 27.5"x2.25"

Rider Notes
Riders Also Viewed

First added March 17

Last updated March 17

Not listed for 2,633 days