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gravel bikeall-road geometry2024

Polygon Tambora G4 bike fit and size guide

Review the published geometry for the 2024 Polygon Tambora G4, compare supported sizes, and open the TrainCraft calculator with this bike preselected.

Supported sizes
4
S, M, L, XL
Family
all-road geometry
This bike balances stability, comfort, and efficient power transfer for mixed-surface riding.
What to compare
Stack, reach, setup
Use this guide to compare stack, reach, and gravel-specific front-end assumptions before choosing a frame size.

Geometry and size breakdown

Every size links back into the calculator so you can compare the Polygon Tambora G4 against your rider measurements instead of picking by height alone.

SizeStackReachTop tubeHead tubeStemCrankCalculator
S568 mm369 mm526 mm143 mm80 mm170 mmOpen size
M593 mm381 mm551 mm163 mm90 mm170 mmOpen size
L622 mm397 mm581 mm193 mm100 mm172.5 mmOpen size
XL650 mm412 mm611 mm221 mm110 mm175 mmOpen size

How to use this guide

Start with the size table to narrow the geometry range you actually want. Then open the calculator to compare that geometry against your body dimensions, flexibility, and fit priorities.

The TrainCraft bike fit tool models saddle height, cockpit reach, and bar drop using the frame geometry plus stock cockpit assumptions for the Polygon Tambora G4.

That is more useful than a generic height chart because two sizes can both fit your height while requiring very different stems, spacers, or saddle positions.

FAQ

What sizes are available for the Polygon Tambora G4?

TrainCraft currently tracks these Polygon Tambora G4 sizes: S, M, L, XL. The calculator uses each size's published geometry and stock cockpit assumptions to compare fit outcomes.

Can I use the TrainCraft calculator for Polygon Tambora G4 sizing?

Yes. Open the calculator from this page to preload the Polygon Tambora G4, then compare sizes against your body measurements, fit priorities, flexibility, and riding posture preferences.

What should I compare on the Polygon Tambora G4 before picking a size?

Start with stack, reach, effective top tube, and the stock stem/crank setup. TrainCraft uses those numbers to estimate cockpit reach, bar drop, saddle position, and how much adjustment headroom each size leaves.

Related gravel bike guides

Use nearby model pages to compare positioning trends before choosing between similar bikes.