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2018 Polygon

XQUARONE DH8

A 27.5″ carbon frame full suspension downhill bike with upper mid-range components.
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Manufacturer Price

$4,299
Weight35.5 lbs  
FrameCarbon
SuspensionFull, 218mm rear
ForkRockShox BoXXer
ShockFox Float X2 Performance
Wheels27.5″ Aluminum
Drivetrain1 × 11
GroupsetGX, e*thirteen LG1
BrakesTRP Hydraulic Disc
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
XQUARONE DH8
Other Downhill 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)

27 mph

XQUARONE DH8

26 mph

Similar Bikes

Highest gear

(descending)

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

Summary

The Polygon Xquarone stands out in the enduro category with its unique R3ACT 2Play suspension system, offering impressive traction, efficiency, and composure in rough terrain. While it excels in pedaling and descending, its unconventional design and conservative geometry may not appeal to everyone. The bike is praised for its ability to inspire confidence and carry speed through challenging sections, though some riders may find its looks divisive and its price point high.

Pros
  • Unique R3ACT 2Play suspension system provides excellent traction and efficiency

  • Impressive composure and speed in rough terrain

  • Encourages rider confidence and progression

  • Climbs efficiently despite its enduro focus

  • High-end componentry and stiff chassis for precise handling

Cons
  • Divisive looks due to unconventional suspension design

  • Conservative geometry may not suit all riders

  • High price point and brand perception could deter some

  • Not as playful or 'poppy' as some competitors

  • Limited trail availability during testing for some models

Key Quotes
the XquarOne DH kept things in check admirably well
Bikerumor logoBikerumor
The most impressive thing about this bike is how it pedals.
BikeRadar logoBikeRadar
The Polygon simply carries more speed through rough terrain than any other bike we’ve ridden.
Flow Mountain Bike logoFlow Mountain Bike

Feedback?

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BikeRadar
Polygon Xquarone EX8 first ride review

Oct 2018 · Seb Stott

When descending, the short front-centre, relatively steep (for the travel) 66-degree head angle and high rear spring rate push the rider’s weight forward, making for a nervous ride on steep, technical trails.

Read Review

Bikerumor
First Ride: Rolling through Glencoe on the new Polygon XquarOne DH

Aug 2018 · Zach Overholt

Upon arrival to Scotland, I still wasn’t sure where we would be riding. All I knew is that we were there to ride the new DH bike from Polygon and we would be staying very close to Fort William the week before the World Cup. That turned out to be a bit of a fake …

Read Review

Flow Mountain Bike
Tested: Polygon XQUARONE EX9

Aug 2017

Watch our full video review below:  Jeez it’s ugly. No, it’s not really, we promise. Pictures just don’t do this bike any favours. It’s unconventional, for sure, but when you see it in the flesh it’s far more impressive than offensive. In an era where bikes seem to settling into a couple of broader frame layouts/configurations, …

Highs
  • Bafflingly good as an all-rounder.

  • More grip and momentum than should be possible.

  • Climbs like a demon.

Lows
  • No bottle mounts.

  • Divisive looks.

Read Review

Geometry
Specs
Build
Frame

NAILD R3ACT 2PLAY SUSPENSION ACX, 218MM TRAVEL, SUPER BOOST 157MM O.L.D.

BB StandardBB86/BB92, Press Fit

ColorBlack Red

Fork

ROCKSHOX BOXXER RC DEBONAIR

Spring TypeAir

Shock

FOX PERFORMACE FLOAT X2 (225x75mm, Trunnion & W/O Hardware)

Travel218mm

Bottom Bracket

E13 BB92 PRESSFIT

Stem

RACE FACE CHESTER 35 DIRECT MOUNT

Handlebar

RACE FACE CHESTER 35

Saddle

ENTITY ASSAULT

Seatpost

ENTITY, 30.9MM

TypeRigid

Pedals

-

Groupset
Rear Derailleur

SRAM GX 11-SPEED

Crank

E13 LG1 36T BOOST, 165MM

Shifters

SRAM GX 11-SPEED

Cassette

SRAM PG-1130 11-SPEED 11-42T

Chain

KMC X-11

Brakes

TRP QUADIEM, 4-PISTON

TypeTRP Hydraulic Disc

Wheels
Rims

E13 LG1

Tires

SCHWALBE MAGIC MARY 27.5”X2.50”

Rider Notes
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First added December 22

Last updated December 22

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