Unveil the Tambora
TAMBORA A5
Features
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Powerful Speed and Unwavering Stability​
Experience the ultimate ride that combines power and speed with unwavering stability. The wheelbase length ensures stability, while the precise head tube angle instills confidence in your steering and control. No need to compromise between speed, stability, and confidence—now, the choice is in your hands.​
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Conquer Diverse Terrains with Ample Tire Clearance​
Accomodating up to 35c of tire for a short position flip chip and 45c for a long position flip chip.
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Free to Choose in a Flip of a Switch​
Where you can switch between speed and agility from a short position flip chip or stability and control from a long position flip chip.
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Experience Effortless Performance with 2-by Drivetrain​
Tailored for those who crave performance on extended, fast-paced all-road adventures, the 2-by drivetrain offers a broad range of gears, ensuring effortless cruising on flats with precision control. It delivers the perfect balance of power, agility, and efficiency for long-distance rides.​
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Enjoy our First Generation of Carbon Gravel Bike​
Introducing our first carbon gravel bike – Tambora A. Experience seamless power transfer at high speeds and become one with the ride.​
Specification
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Frameset
FramesetForkSizeFrame ColorDecal Color
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Drivetrain
ShifterCrankCassetteRear DerailleurBBChain
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Cockpit
SaddleSeatpostHandlebarHandlestemHeadset
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Wheel & Tire
Wheel SetWheel SizeTireRimHubSpokes
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Brake
Brake LeverBrake CaliperRotor
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FAQ
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Where are the mounts to hold gear? If I wanted to buy a bolted bag, what are the specifications? For full frame and half frame​
There are 14 mounts on the Polygon Tambora series; 3 on the top tube, 7 on the down tube, 2 on the seat tube, and a pair of rear carrier mounts. We're using universal-size mounts, so there are no special specifications for the compatible bolted bag. You can freely choose the bolted bag that fits you best.​
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What is the biggest chainring I can fit?​
The maximum chainring of Tambora series is 48T.
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What are the biggest rotors I can fit?​
The biggest rotors for the Tambora series are 160 mm.
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Can you fit mudguards and carriers?​
Yes, only a rear mudguard and carrier can be fitted.​
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How do you change the flip chip?​
The Tambora has flip chips located at the rear dropouts and the base of the fork, allowing you to easily switch between gravel and all-road configurations. Watch the full video here.
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Can I fit a dropper post?​
Yes! But it should be a gravel bike dropper post which commonly designed from 50mm to 125mm of travel.​
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Is it possible to upgrade a road bike to a gravel bike?​
This should not be possible because of the small tire clearance and its fixed aggressive geometry.​
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How does the geometry of Tambora bikes differ from gravel bikes and other road bikes?​
The gravel bike has a higher stack, slacker head angle, and longer wheelbase for stability.​