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Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
Polygon Tambora G4 - Gravel Bike
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Description

LIGHTWEIGHT

Aluminum has long been the ideal material for bikes and aeroplanes with its incomparable strength-to-weight ratios. The frame features an integrated front end, internal cable routing, multiple mounting points for things like bottle cages, racks, mudguards and space for 45mm tyres.

GEOMETRY

Tambora features modern geometry with aggressive head and seat tube angles, long 425mm chainstays for comfort, and a 277mm bottom bracket height with the perfect amount of clearance. It also features a longer wheelbase designed for high-speed stability

INDUSTRY REVIEWS

Top Pick “The Tambora is a thoroughly modern bike-packing gravel bike with features usually found on more expensive bikes.” Cycling About

SPACE TO RACE

The Tambora also makes the perfect racer-all-rounder with multiple mounting points for bottle cages, racks, mudguards and just about anything else you need to carry.

THE ADVENT

Microshift Advent 10-Speed gears offer the range and durability you need to tackle just about any terrain. Advent is not only reliable but is super easy to use.

Components

FRAMESET
FRAME
ALX Gravel Alloy Frame, Threaded BSA 68mm Bottom Bracket, Flat Mount Disc Brake, 12x142mm Rear Thru-Axle, Internal Cable Routing
HEADSET
Token TK156SP-CHHC Sealed Bearing
SUSPENSION
FORK
Carbon Rigid Fork, Flat Mount Disc Brake, 12x100mm Thru-Axle
DRIVETRAIN
REAR DERAILLEUR
Microshift Advent X M6205GM, 10-Speed
SHIFTER
Microshift Advent X SB-M100, 1x10-Speed Brifter
CRANK
Alloy, 170mm
CHAINRING
40T
CASSETTE
Microshift Advent X CS-H104, 11–48T, 10-Speed
CHAIN
KMC X10
BRAKES
FRONT BRAKE
Tektro MD-C550 Mechanical Disc Brake
REAR BRAKE
Tektro MD-C550 Mechanical Disc Brake
ROTOR
Tektro 160mm, 6-Bolt
WHEELS
REAR HUB
Alloy Disc Brake, 12x142mm Thru-Axle, 32H, 6-Bolt
RIM
Alloy Double Wall, 700c, 23mm Inner Width, 32H, Tubeless Compatible **
TYRE
Vee Tire Co. Rail Frenzy, 700x40, Tubeless Compatible **
MAX TYRE SIZE
700x45
CONTACT POINTS
HANDLEBAR
Polygon Alloy flare, 31.8mm Clamp Diameter, 125mm Rise, 16 Degree Flare, 420mm Width (S-M), 440mm Width (L-XL)
SADDLE
Selle Italia Superflow
SEATPOST
Entity 27.2 x 350mm
STEM
Entity Expert, 31.8mm Clamp, 7-Degree, 90mm (S,M) / 100mm (L, XL)
WEIGHT
BIKE WEIGHT
25lbs (Size: M)

Specs are subject to change based on availability.

** Tubeless Tape, Valves and Sealant are sold separately.

Geometry

  S M L XL
Rider Height 4'11"–5'4" 5'4"–5'9" 5'9"–6'2" 6'2"–6'5"
Top Tube Length 525 550 580 610
Reach 368 381 397 411
Stack 566 590 620 652
Seat Tube Length 405 449 493 537
Chainstay Length 425 425 425 425
Head Tube Angle 70 71.5 72 72
Seat Tube Angle 74.5 74 73.5 73
BB Height 277 277 277 277
Wheelbase 1017 1023 1045 1068
Head Tube Length 140 160 190 225
Bottom Bracket offset 78 78 78 78
Standover 690 731 773 812

Assembly

Your bike needs minor assembly before riding; use the tools and videos included.

As a guide, it'll take 10-40min depending on whether you're an experienced bike assembler or have little to no mechanical experience.

Side Note: Your cables will stretch during the initial bed-in period and must be adjusted by an experienced mechanic around 150km of riding.

Step 1

Unboxing Your Tambora G4

Step 2

Dial In Your Bike Fit

Step 3

Dial In Your Tyre Pressures

Step 4

Pre-Ride Check

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