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2021 Polygon

SISKIU T8

A 27.5″ / 29″ aluminum frame full suspension trail bike with upper mid-range components.
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Manufacturer Price

$2,599
Weight15.2 kg  
FrameAluminum
SuspensionFull, 140 / 150mm
ForkFox Rhythm Float 34
ShockFox Float DPS Performance
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 12
GroupsetSLX
BrakesTektro Hydraulic 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)

44 km/h

SISKIU T8

42 km/h

Similar Bikes

Highest gear

(descending)

Sizing
SM

152cm – 165cm

MD

162cm – 175cm

LG

172cm – 185cm

XL

182cm – 195cm

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

Summary

The Polygon Siskiu trail bike family is celebrated for its modern geometry, excellent value, and versatile performance across various terrains. Reviews highlight its efficient climbing, playful descending, and plush suspension, making it a standout in its price range. While some components like brakes and suspension sophistication are noted as areas for improvement, the overall package is praised for its capability and fun factor.

Pros
  • Modern trail bike geometry

  • Excellent value for the price

  • Plush and active suspension

  • Efficient climber

  • Playful and confident descender

Cons
  • Resin-only brake rotors limit braking power

  • Suspension platform could be more sophisticated

  • Some components may require upgrades for aggressive riding

Key Quotes
Seriously, this has got to be the best $2,500 bike we’ve tested to date.
Beta logoBeta
The Siskiu T8’s most endearing trait is just how playful it is on the trail.
Flow Mountain Bike logoFlow Mountain Bike
The reasonably priced Siskiu D7 is an excellent, affordable option to consider.
Outdoor Gear Lab logoOutdoor Gear Lab
My kid said he had never had so much fun on a bike in his life.
Two Wheeling Tots logoTwo Wheeling Tots

Feedback?

View all reviews

Outdoor Gear Lab
Polygon Siskiu T8

Sept 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!

Highs
  • Low price point for full suspension with modern geometry

  • Lightweight for price and build

  • Tune-able air sprung fork (with lockout) and rear shock

  • Thru-axles for increased stiffness and rigidity

  • Internal routing for dropper post

  • 1x trigger shifters for quick and easy shifting

  • Pre-taped tubeless ready rims

Lows
  • Mechanical disc brakes not ideal

  • Does not come with tubeless ready tires (only rims)

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 · 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 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

Sept 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
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

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

TypeTektro Hydraulic 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
Riders Also Viewed

First added 12 May

Last updated 5 April

Not listed for 1,518 days