2021 Polygon

SISKIU N9

A 27.5″ / 29″ aluminum frame full suspension enduro bike with high-end components.
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MSRP$3,399
Weight39.9 lbs  
FrameAluminum
SuspensionFull, 170 / 170mm
ForkFox Performance Float 36
ShockFox Float DPX2 Performance
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 12
GroupsetXT
BrakesHydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
SISKIU N9
Other Enduro 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)

28 mph

SISKIU N9

26 mph

Similar Bikes

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full Siskiu model range

View Comparison
Sizing
SM

5'0" – 5'5"

MD

5'3" – 5'9"

LG

5'7" – 6'1"

XL

5'11" – 6'5"

Rider Fit Notes

None yet.

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Reviews
Beta
The Beta Tests: Polygon Siskiu T8

Dec 2021 · Ryan Palmer

Possibly the best $2,500 bike we've ever ridden.

Highs
  • Fully capable, modern trail bike geometry

  • Excellent parts spec for the price

  • Internal cable routing

Lows
  • Resin-only brake rotors create weak braking

  • Suspension platform isn't very sophisticated

Read Review

Two Wheeling Tots
Polygon Siskiu D24 Full Suspension Kids Mountain Bike

Oct 2021 · Kelly Jorgensen

An affordable full suspension 24" kids mountain bike? The Polygon Siskiu D24 is a perfect blend of price and performance. Read the review!

Read Review

Outdoor Gear Lab
Polygon Siskiu D7

Oct 2021 · Jeremy Benson

As the price of bikes continue to skyrocket, Polygon bucks that trend with their direct-to-consumer sales model and the affordable Siskiu D7. This...

Highs
  • Reasonable price

  • Comes with a dropper post

  • Fun on a range of terrain

  • Efficient climber

  • Playful on descents

Lows
  • Non-boost fork

  • Some cable rattle over rough terrain

  • Can be overwhelmed on aggressive trails

Read Review

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

Aug 2020

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

Read Review

Loam Wolf
Budget Bike Shootout: Polygon Siskiu T7 LTD

Jun 2020

The Polygon Siskiu T7 LTD is a solid, affordable mountain bike and one that will certainly make a lot of rider’s dreams come true. Aggressive riders looking for a great budget bike should read our detailed review of the Polygon Siskiu T7 here!

Read Review

NSMB
Polygon Siskiu N9 160mm 29'er Review

Feb 2020

Polygon's 160mm aluminum 29'er looks to deliver value and performance and shows potential 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

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

ALX AM / ENDURO 170MM TRAVEL (27.5”) / 160MM TRAVEL (29”), TAPER H/T TA BOOST

BB StandardBSA, 73mm, Threaded

ColorRadiant Galaxy - Black

Fork

FOX PERFORMANCE 36 FLOAT 170MM (27.5”) / 160MM (29”) TRAVEL

Travel170mm

Spring TypeAir

Shock

FOX PERFORMANCE FLOAT DPX2 E2E:205X65, 3 POS LEVER, LV EVOL, HARDWARE:8MMX25MM & TRUNNION

Travel170mm

Spring TypeAir

Bottom Bracket

SHIMANO BSA THREADED

Stem

RACEFAE AEFFECT R35, ALLOY E:50MM R:0DEG BB:35MM

Handlebar

RACEFACE AEFFECT R35, ALLOY W:780MM R:20MM BB:35MM

Saddle

ENTITY XTENT

Seatpost

DROPEPR POST 150mm (S&M) / 170mm (L & XL)

TypeDropper

Pedals

ALLOY FLAT PEDAL W/REPLACEABLE PIN

Groupset
Rear Derailleur

SHIMANO XT RD-M8100 12-SPEED DA

Crank

SHIMANO DEORE XT FC-M8100-1 BOOST 12SP 32T 170MM (S-M) 175MM (L-XL)

Shifters

SHIMANO XT SLM8100 12-SPEED

Cassette

SHIMANO XT CSM8100 12-SPEED 10-51T

Chain

SHIMANO CN-M7100

Brakes

TRP SLATE T4 4 PISTON

TypeHydraulic Disc

Wheels
Rims

ENTITY XL2 DISC 35-584 (27.5”) / 35-622 (29”)

Spokes

Stainless Steel Spokes

Front Hub

Entity, sealed bearings

Rear Hub

Entity, sealed bearings

Tires

WTB VIGILANTE 27.5”X2.6 / 29”X2.3

Disc Rotors

Shimano SLX SM-RT70, Rotors F/R: 180/180mm

Rider Notes
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Last updated December 5
Not listed for 476 days