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2025 Polygon

TAMBORA G4

An aluminum frame gravel bike with upper mid-range components and tektro mechanical disc brakes.
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Manufacturer Price

$899
Price History
FrameAluminum
SuspensionRigid
ForkCarbon
Wheels700c Aluminum
Drivetrain1 × 10
GroupsetmicroSHIFT Advent X
BrakesTektro Mechanical Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
TAMBORA G4
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)

31 mph

TAMBORA G4

36 mph

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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

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Sizing
SM

4'11" – 5'5"

MD

5'3" – 5'10"

LG

5'8" – 6'3"

XL

6'1" – 6'5"

Rider Fit Notes
  • 5'5", size SM, Fits small
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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 ...

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Geometry
Specs
Build
Frame

aluminum

BB Standard: BSA, 68mm, Threaded

Tire Clearance: 45c

Color: Broken White

Fork

CARBON RIGID

Bottom Bracket

THREADED BSA 68mm

Headset

TOKEN TK156SP-CHHC W/ SEALED BEARING

Stem

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

Handlebar

ALLOY FLARE 16degree, W: 420mm (S, M) / 440mm (L, XL), BB: 31,8mm, R/D: 125mm, B/R: 77mm

Saddle

SELLE ITALIA MODEL X

Seatpost

ALLOY SEATPOST, DXL: 27,2 x 350mm

Type: Rigid

Pedals

Not Included

Groupset
Rear Derailleur

MICROSHIFT ADVENT X M6205GM 10-SPEED

Crank

ALLOY 40T

Shifters

MICROSHIFT ADVENT X SB-M100, 1x10-SPEED BRIFTER

Cassette

MICROSHIFT ADVENT X CS-H104 10 SPEED 11-48T

Chain

KMC X10

Brakes

TEKTRO MD-C550 MECHANICAL

Type: Tektro Mechanical Disc

Brake Levers

MICROSHIFT ADVENT X SB-M100

Wheels
Rims

ALLOY DOUBLE WALL FV H: 19 622X23 32H TLR

Spokes

F: STAINLESS 14G NDS:290 & DS:294 W/ NIPPLE BRASS / R: STAINLESS 14G NDS:292 & DS:290 W/ NIPPLE BRASS

Front Hub

ALLOY DISC BRAKE 12x100mm 32H 6B

Rear Hub

ALLOY DISC BRAKE 12x142mm 32H 6B FOR SPROCKET

Tires

VEE RAIL 700x40C 622x40 TLR

Disc Rotors

TEKTRO 160mm 6B

Rider Notes
Riders Also Viewed

First added August 31

Last updated June 1