Is the Tambora G4 good for beginners?

Yes. The stable geometry, wide gearing and simple mechanical brakes make it forgiving for new gravel riders. It is a sensible first gravel bike if you want to learn maintenance yourself.

Can it fit wider tires?

Polygon lists 45c clearance, so you can move up from the stock 40c tires for more comfort and grip on loose surfaces.

How does it compare with a carbon gravel bike?

It is heavier and less compliant than carbon frames, but the carbon fork takes out some road buzz. It costs far less and uses easier-to-service parts.

Are the brakes hydraulic?

No. It uses Tektro MD-C550 mechanical disc brakes with 160mm rotors. They are simple to adjust but offer less power than hydraulic systems.

What drivetrain does it have?

A 1x10 Microshift Advent X setup with a 40T crank and an 11-48T cassette. That gives a wide range for climbing without a front derailleur.

Is it tubeless ready?

The Vee Rail tires are marked TLR and the rims are tubeless-ready, so a conversion is possible with the right tape and valves.

Where is the Polygon Tambora G4 - Gravel Bike cheapest?

At BikesOnline US, for $1,199.99, as of our latest check.

What do buyers say about the Polygon Tambora G4 - Gravel Bike?

Rated 3.9 out of 5 from 16 ratings.

Polygon Tambora G4 - Gravel Bike

Best price now

$1,199.99at BikesOnline USChecked 3 h ago

Prices are checked against each store and labelled with when.

Visit BikesOnline US

Polygon Tambora G4 - Gravel Bike

Best price now

$1,199.99at BikesOnline USChecked 3 h ago

Prices are checked against each store and labelled with when.

Visit BikesOnline US

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Price facts

Last seen at $1,199.99 at BikesOnline US on Nov 12.

Our take on the Polygon Tambora G4 - Gravel Bike

The Tambora G4 is Polygon's aluminum gravel bike with a carbon fork, a 1x10 Microshift Advent X drivetrain and mechanical Tektro disc brakes. The wide 11-48T cassette and 40c tires make it a capable all-rounder for mixed surfaces, and the threaded bottom bracket and 45c clearance keep it easy to live with. It suits riders who want a dependable gravel platform without paying for a carbon frame. Owners rate it around 3.9 out of 5, liking the value and ride but noting the mechanical brakes and heavier build compared with pricier gravel bikes.

Best forFirst gravel bike on a budgetMixed-surface commuting and light touringRiders wanting wide gearing for climbsHome mechanics who prefer simple, serviceable parts

Pros

Carbon fork softens road buzz and saves weight
1x10 Advent X with 11-48T cassette gives a wide climbing range
Threaded BSA bottom bracket is easy to service
45c tire clearance allows wider rubber
Mechanical disc brakes are simple to maintain

Cons

Mechanical Tektro brakes lack the power and feel of hydraulics
Microshift Advent X shifting is less refined than name-brand groups
Aluminum frame and 40c tires make it heavier than carbon rivals
No thru-axle or tubeless-ready details confirmed beyond the tires

Polygon Tambora G4 - Gravel Bike prices at every store

BikesOnline USNew
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$1,199.99Checked 3 h ago
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Polygon Tambora G4 - Gravel Bike price history

Lowest price we've seen: $1,199.99 on Nov 12 at BikesOnline USA. Tracked across 1 store since Nov 12.

What reviewers say

3.9 / 516 ratings

Owners give the Tambora G4 middling-to-good marks, praising its value, stable handling and wide gearing for the money. Complaints center on the mechanical brakes and the weight and shifting feel compared with more expensive gravel bikes.

What people mention

BrakesCriticisedRiders say the mechanical Tektro discs lack bite and modulation on steep, loaded descents.
ValuePraisedOwners feel the carbon fork and wide gearing give a lot for the money.
WeightMixedSome find the aluminum frame heavier than carbon rivals, though acceptable for the category.
GearingPraisedThe 11-48T cassette is praised for making steep climbs manageable.
ShiftingMixedMicroshift Advent X works well but feels less crisp than name-brand groupsets.
HandlingPraisedRiders describe stable, predictable handling on gravel and rough pavement.

About the Polygon Tambora G4 - Gravel Bike

The Polygon Tambora G4 is a lightweight gravel bike designed for stability, speed and versatility across different terrains. It has an ALX Gravel frame and a rigid carbon fork.

It uses a 1x10-speed drivetrain with a Microshift Advent X brifter, rear derailleur and 11-48T cassette, paired with a 40T alloy crank. Tektro mechanical disc brakes with 160mm rotors handle stopping. The frame clears tires up to 45c.

Frame: ALX Gravel
Fork: Carbon, rigid
Shifter: Microshift Advent X SB-M100, 1x10-speed brifter
Crank: Alloy, 40T
Cassette: Microshift Advent X CS-H104, 10-speed, 11-48T
Rear derailleur: Microshift Advent X M6205GM, 10-speed
Bottom bracket: Threaded BSA, 68mm
Tires: Vee Rail 700x40C (622x40), TLR
Brake calipers: Tektro MD-C550, mechanical
Rotors: Tektro, 160mm, 6-bolt
Tire clearance: 45c

Specifications

Frame material: ALX GRAVELSource
Fork: CARBON RIGIDSource
Shifter: MICROSHIFT ADVENT X SB-M100, 1x10-SPEED BRIFTERSource
Crank: ALLOY 40TSource
Cassette

Questions and answers

Is the Tambora G4 good for beginners?: Yes. The stable geometry, wide gearing and simple mechanical brakes make it forgiving for new gravel riders. It is a sensible first gravel bike if you want to learn maintenance yourself.
Can it fit wider tires?: Polygon lists 45c clearance, so you can move up from the stock 40c tires for more comfort and grip on loose surfaces.
How does it compare with a carbon gravel bike?: It is heavier and less compliant than carbon frames, but the carbon fork takes out some road buzz. It costs far less and uses easier-to-service parts.
Are the brakes hydraulic?: No. It uses Tektro MD-C550 mechanical disc brakes with 160mm rotors. They are simple to adjust but offer less power than hydraulic systems.
What drivetrain does it have?: A 1x10 Microshift Advent X setup with a 40T crank and an 11-48T cassette. That gives a wide range for climbing without a front derailleur.
Is it tubeless ready?: The Vee Rail tires are marked TLR and the rims are tubeless-ready, so a conversion is possible with the right tape and valves.
Where is the Polygon Tambora G4 - Gravel Bike cheapest?: At BikesOnline US, for $1,199.99, as of our latest check.
What do buyers say about the Polygon Tambora G4 - Gravel Bike?: Rated 3.9 out of 5 from 16 ratings.