2022 · PolygonSISKIU T8

A 27.5″ / 29″ aluminum frame full suspension enduro bike with upper mid-range components. Compare the full range

2022 Polygon SISKIU T8
MSRP$2,599
Weight33.5 lbs
SuspensionFull
Travel150mm rear, 150mm front
FrameAluminum
ForkFox Rhythm Float 34
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 12
GroupsetSLX, Shimano
BrakesHydraulic Disc
SeatpostDropper
View on polygonbikes.comLearn about Polygon
Where to Buy
Similar Bikes

Gearing

1 × 12 — 12 speed

SISKIU T8

24 mph

Similar Bikes

26 mph

The SISKIU T8 is easier to ride up hills than similar bikes.

The SISKIU T8 won‘t keep up with similar bikes while riding downhill or sprinting.


Estimated Spec Level

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

Spec level →$0$500$1,000$1,500$2,000$2,500
This bike
Other enduro bikes

Reviews
MBR
Polygon Siskiu T8 29 review - MBR

Alan MuldoonJan 2023

The Polygon Siskiu is a hard hitting 29er trail bike with 135mm of travel and a 140mm fork. Dig a little deeper however, and you quickly discover that this isn’t your typical entry-level full suspension bike that’s been dumbed down for mass production. In fact, it’s one of the best budget mountain bikes out there.  Best mountain bikes: the ultimate trail, enduro and XC bikes Need to know: Fox 34 fork and Float DPS shock deliver 140mm and 135mm of travel respectively Polygon offers four frame size with a generous 496mm reach on the XL Shimano SLX 12 speed derailleur, shifter and cassette, but with a KMC chain The in-house Entity components are all top quality. The Siskiu gets a relatively slack 65.8º head angle for a stable steering response, ultra-short 430mm chainstays to make it easier to loft the front end, and generous reach measurements across the four frame sizes to guarantee a good fit. And while lots of brands make a big song and dance about custom sizing, but fail to provide short enough seat tubes with adequate dropper post insertion to make it possible to upsize, Polygon has nailed it on the Siskiu T8. With the 430mm seat tube we could comfortably ride the XL bike with the 170mm dropper with room to upgrade to a 200mm post if needed.  Detailing on the Siskiu frame is also first rate, from the copper highlights under the seat collar that matches the logo on the underside of the downtube, to the one-piece rocker link that adds frame stiffness while maintaining a minimalist, clean look. Even the bespoke chainstay protection looks fitting for a more expensive bike.  Cable routing on the Siskiu is internal on the front triangle, and thanks to tighter sealing on the entry and exit ports for the cables, there was no noticeable rattle. That’s not to say the Siskiu was a silent runner, however. The large loop of brake hose that’s necessary to prevent it from kinking as it exits the rear brake calliper has a tendency to touch the spokes of the rear wheel after the suspension has been compressed, so it can sound like you have a stick stuck in the swingarm. Suspension Getting Fox suspension on a £2k trail bike is quite a boon. And while the 140mm travel Fox 34 Rhythm fork isn’t quite as stout as the 35mm chassis on the RockShox equipped Jamis Faultline, an equivalently-priced bike, it’s only 1mm smaller, so nothing to write home about. The Fox 34 feels responsive and supple off the top, and with a good degree of ramp up it doesn’t bottom too easily on bigger hits. We measured the rear travel on the Siskiu frame at 136mm, so clearly there’s no rounding up here. The single pivot suspension design is controlled by an inline Fox Float DPS shock. It offers a really usable range of rebound adjustment that will comfortably cover a wide variety of rider weights. Using all of the travel doesn’t …Continue reading »

Pros
  • Progressive sizing and geometry, great value for money

Cons
  • Needs a Shimano chain

Read Review

BikeRadar
Polygon Siskiu T7 29 review

Luke MarshallJan 2023

When it comes to bang for buck, the Siskiu T7 29 has to be one of the most impressive bikes out there

Pros
  • Geometry is on point for trail riding

  • Frame is future-proof and ready for upgrades

  • Decent tyres for getting rowdy

  • Capable suspension

  • 1x12 gears

Cons
  • Brakes are component weak link

  • Great for thrashing rather than mile munching

Read Review

Outdoor Gear Lab
Polygon Siskiu T8

Jeremy BensonSep 2022

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...

Pros
  • Awesome build for the price

  • Versatile

  • Well-rounded performance

Cons
  • Firm grips

  • Saddle shape

Read Review

Pinkbike
Polygon's New 6 Bar Enduro Bike - Sea Otter 2022

James SmurthwaiteApr 2022

Polygon's race team has been spotted at Sea Otter on a new enduro bike that is due to replace the current Siskiu N9..

Read Review

Beta
The Beta Tests: Polygon Siskiu T8

Ryan PalmerDec 2021

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

Pros
  • Fully capable, modern trail bike geometry

  • Excellent parts spec for the price

  • Internal cable routing

Cons
  • Resin-only brake rotors create weak braking

  • Suspension platform isn't very sophisticated

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.

Pros
  • Exceptionally capable package for the money

  • Confidence-inspiring geometry

  • Grippy high-volume rubber

  • Supple & supportive suspension

  • Sporty handling for a tough trail bike

Cons
  • 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


Geometry

Sizing
SM

4'11" – 5'5"

MD

5'3" – 5'9"

LG

5'7" – 6'1"

XL

5'11" – 6'5"


Specs
Build
Frame

ALX TRAIL ENDURO 150mm (27.5") / 140mm (29") TRAVEL

BB StandardBSA, 73mm, Threaded

ColorRadiant Purple - Black

Fork

FOX 34 RHYTHM 150mm (27.5") / 140mm (29") TRAVEL

Rear Shock

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

Bottom Bracket

SHIMANO 2-PIECE CRANKSET BSA THREADED

Headset

ZERO STACK (ZS) SEALED BEARING FOR TAPER HEAD TUBE, ZS 44/28.6 | ZS 56/40

Stem

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

Handlebar

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

Saddle

ENTITY XTENT

Seatpost

TRANZ-X 150MM (S-M) 170 (L-XL) TRAVEL, ZERO OFFSET, 30.9MM

Pedals

Alloy Flat with Pins

Groupset
Rear Derailleur

SHIMANO SLX RD-M7100-SGS DIRECT ATTACH

Crank

SHIMANO MT-510-1 BOOST 32T

Shifters

SHIMANO SLX SL-M7100-R, 1x12-SPEED TRIGGER

Cassette

12 SPEED 11-51T

Chain

KMC X12 12SPEED

Brakes

TEKTRO HD-M745 4-PISTONS HYDRAULIC DISC BRAKES

Wheels
Rims

584 / 622-35 32H FOR TYRE 584 / 622-54/76 TUBELESS READY

Front Hub

Shimano HB-MT410, Thru Axle 15x110mm 32h, Center-Lock

Rear Hub

Shimano FB-MT410, Thru Axle 12x148mm 32h, Center-Lock, Microspline Hub

Tires

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

Disk Rotors

SHIMANO SM-RT54 180mm CENTER-LOCK

Riders Also Viewed

Deals