2021 Polygon

SISKIU D7

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

MSRP$1,799
Weight36.0 lbs  
FrameAluminum
SuspensionFull, 120 / 120mm
ForkRockShox Recon Silver RL
ShockRockShox Deluxe Select+
Wheels27.5″ / 29″ Aluminum
Drivetrain1 × 11
GroupsetDeore
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 D7
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)

25 mph

SISKIU D7

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
  • 6'3", size XL, Just right
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

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

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

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 XC 120MM TRAVEL (27.5”) / 120MM TRAVEL (29”), TAPER H/T TA BOOST

ColorBlue / Purple / Black

Fork

ROCKSHOX RECON RL, 15X100MM, 120MM (27.5”) / 120MM (29”) TRAVEL

Travel120mm

Shock

ROCKSHOX DELUXE SELECT PLUS E2E: 190X45MM METRIC, HARDWARE: M8X25MM

Travel120mm

Bottom Bracket

SHIMANO DEORE

Headset

Threadless Zero Stack Headset, ZS 44/28.6 | ZS 56/40

Stem

ENTITY XPERT, ALLOY

Handlebar

ENTITY XPERT, ALLOY

Saddle

ENTITY VOID SADDLE

Seatpost

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

TypeDropper

Pedals

-

Groupset
Rear Derailleur

SHIMANO DEORE RD-M5100

Crank

SHIMANO DEORE FC-M5100 32T

Shifters

SHIMANO DEORE SL-M5100, 1x11SPEED TRIGGER

Cassette

SHIMANO DEORE CS-M5100 11-51T

Chain

KMC X11-1

Brakes

SHIMANO MT200 HYDRAULIC DISC BRAKE

TypeHydraulic Disc

Wheels
Rims

ALLOY DOUBLE WALL 32H

Spokes

Stainless Steel Spokes

Front Hub

Shimano alloy hubs

Rear Hub

Shimano alloy hubs

Tires

SCHWALBE NOBBY NIC PERFORMANCE 27.5"x2.25" / 29"x2.25"

Rider Notes
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Last updated June 17
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