Tambora G4
OverviewAbout the Polygon Tambora G4
The Polygon Tambora G4 is a gravel bike, built on a aluminium frame, listed at $1,399. A drop-bar all-road bike for gravel, dirt and mixed surfaces.
SpecificationsWhat we know
- Brand
- Polygon
- Model year
- 2024
- Category
- Gravel
- Frame
- Aluminium
- Wheel size
- 700c
- Drivetrain
- Microshift Advent 10-speed
- Brakes
- Disc
- Price
- $1,399 (RRP AUD (Reid Cycles))
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
- Stack
- 593 mm
- Reach
- 381 mm
- Stack/reach
- 1.56
- Head angle
- 71.5 deg
- Seat angle
- 74 deg
- Wheelbase
- 1022 mm
- Chainstay
- 425 mm
- BB drop
- 78 mm
- Standover
- 755 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Microshift Advent X
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 10
- Crank
- Alloy, 40T
- Chainrings
- 1
- Cassette
- Microshift Advent X CS-H104, 10-speed
- Rear derailleur
- Microshift Advent X M6205GM, 10-speed
- Brakes
- Tektro MD-C550 mechanical disc
- Rotors
- 160mm
- Wheelset
- Alloy double wall, 32H
- Rim internal width
- 19 mm
- Stock tyre
- 700x40C
- Max tyre clearance
- 45 mm
- Tubeless
- Yes
- Fork material
- Carbon rigid
- BB standard
- Threaded BSA 68mm
- Thru-axle
- Front 12x100mm, Rear 12x142mm
- Seatpost
- Alloy, 27.2 x 350mm
- Cockpit
- Alloy flare bar (420mm S/M, 440mm L/XL, 16 degree flare) with alloy stem (90mm S/M, 100mm L/XL, 7 degree)
- Saddle
- Selle Italia Model X
- Mounts
- 14 universal mounts (3 top tube, 7 down tube, 2 seat tube, rear carrier pair)
Bike DNAWhat the numbers say
- Position
- Stack-to-reach 1.56 gives an upright, comfort-oriented riding position.
- Steering
- A 71.5 deg head angle points to balanced steering.
- Climbing
- Lowest ratio 0.02 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (polygonbikes.com product page (tambora-g4)), verified 2026-09-04. This is a specification analysis, not a physical ride review.
Where to buyStockist
BikeFinder is an independent directory. We link to retailers; the price shown is last seen and set by the seller.
