2021 Polygon

SISKIU T8

A 27.5″ / 29″ aluminum frame full suspension trail bike with upper mid-range components.
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MSRP$2,599
Weight33.5 lbs  
FrameAluminum
SuspensionFull, 140 / 150mm
ForkFox Rhythm Float 34
ShockFox Float DPS Performance
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 12
GroupsetSLX, Shimano
BrakesHydraulic Disc
SeatpostDropper
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
SISKIU T8
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)

28 mph

SISKIU T8

26 mph

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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
Outdoor Gear Lab
Polygon Siskiu T8

Sep 2022 · 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

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

Flow Mountain Bike
Polygon Siskiu T8 Review | Big fun without the big price tag

Jan 2021

Polygon's updated Siskiu T is proof that you don't have to spend the earth to get a very capable trail bike. Featuring on-trend geometry, a robust build kit and a host of improvements over the old model, the Siskiu T8 will have you questioning why you'd need to spend any more.

Highs
  • Exceptionally capable package for the money

  • Confidence-inspiring geometry

  • Grippy high-volume rubber

  • Supple & supportive suspension

  • Sporty handling for a tough trail bike

Lows
  • Handlebars need more sweep

  • Brakes aren't hugely powerful

  • The wheels ain't light

Read Review

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

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

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

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 TRAIL FRAME 140MM TRAVEL (27.5”) / 135MM TRAVEL (29”), TAPER H/T

BB StandardBSA, 73mm, Threaded

ColorPurple Black

Fork

FOX 34 RHYTHM BOOST 15X110MM, 150MM (27.5”) / 140MM (29”) TRAVEL

Travel150mm

Spring TypeAir

Shock

FOX FLOAT DPS SPECIAL TUNING E2E:210X55MM, HARDWARE:8MMX25MM

Travel140mm

Spring TypeAir

Bottom Bracket

BSA THREADED

Stem

ENTITY XPERT, ALLOY E:35MM R:7DEG BB:35MM

Handlebar

ENTITY XPERT, ALLOY W:780MM R:20MM BB:35MM

Saddle

ENTITY XTENT

Seatpost

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

TypeDropper

Pedals

-

Groupset
Rear Derailleur

SHIMANO RD-M7100 SLX

Crank

SHIMANO FC-MT510-1 BOOST 32T 170MM (S-M)/175MM (L-XL)

Shifters

SHIMANO SL-M7100-R SLX

Cassette

SHIMANO CS-M7100-12 SLX 10-51T

Chain

KMC X12 12SPEED

Brakes

TEKTRO HD-M745 4 PISTON

TypeHydraulic Disc

Wheels
Rims

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

Tires

PERFORMANCE TIRE, 27.5”X2.40” / 29”X2.40”

Rider Notes
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Last updated April 5
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