2024 Polygon

Tambora G8X

A carbon frame gravel bike with upper mid-range components and hydraulic disc brakes.
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Manufacturer Price

$2,799$2,999
Weight3.1 lbs (frame)  
FrameCarbon
SuspensionRigid
ForkCarbon
Wheels700c Aluminum
Drivetrain1 × 12 Electronic
GroupsetRival XPLR AXS, Rival AXS
BrakesHydraulic Disc
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Top Comparison
Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
Tambora G8X
Other Gravel 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)

35 mph

Tambora G8X

36 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 Tambora model range

View Comparison
Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

None yet.

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Price History
Reviews
99 Spokes
Polygon Tambora Review || Two Bikes in One!

Mar 2024

The Polygon Tambora G7 packs a ton of features (adjustable geometry anyone!) into a low its small price tag! But high value on ...

Watch Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

ACX Gravel Frame, Internal Cable Routing, BB THREADED T47 86.5mm, 12x142mm Thru-Axle, Flat Mount Disc, SRAM UDH

BB StandardT47, Threaded

Hanger StandardUDH

Fork

Polygon Full Carbon Rigid fork, Flat Disc Brake, 12x100mm

Bottom Bracket

SRAM DUB T47

Headset

ZS 56/28.6 | ZS 56/40

Stem

Entity Expert, 31.8mm Clamp, 7-Degree, 90mm (S,M) / 100mm (L, XL)

Handlebar

Polygon Alloy flare, 31.8mm Clamp Diameter, 125mm Rise, 16 Degree Flare, 420mm Width (S-M), 440mm Width (L-XL)

Saddle

Selle Italia Superflow

Seatpost

Entity Carbon, 27.2 x 300mm (S,M,L) / 27.2 x 350mm (XL)

TypeRigid

Groupset
Rear Derailleur

SRAM Rival XPLR ETAP AXS, 12-Speed

Crank

SRAM RIVAL 1 WIDE 40T, 170mm

Shifters

SRAM Rival ETAP AXS, 12-Speed Shifter

Cassette

SRAM XG-1251, 10-44T, 12-Speed

Chain

SRAM Rival, 12-Speed

Brakes

Front: SRAM Rival, Hydraulic Disc Brake, 160mm Rotor, Rear: SRAM Rival, Hydraulic Disc Brake, 160mm Rotor

TypeHydraulic Disc

Wheels
Rims

Front: Novatec G24 Disc, 24mm Internal width, 12x100mm, 24H, Novatec D791, 6 Bolt Hub, Stainless spokes, Brass Nipple, Tubeless Tape Installed, Rear: Novatec G24 Disc, 24mm Internal width, 12X142mm, 24H, Novatec D792, 6 Bolt Hub, Stainless spokes, Brass Nipple, Tubeless Tape Installed

Tires

Front: Vee Tire Rail Frenzy, 700x40C, Rear: Vee Tire Rail Frenzy, 700x40C

Rider Notes
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Last updated April 28