UNVEIL THE TAMBORA
Swift adventures unlocked in 1 bike. Drawing inspiration from the birth of bicycles, sparked by the largest volcanic eruption in recorded history, Mount Tambora, we've looked back and reminded ourselves and the world of this history by creating the Polygon Tambora G – a perfect fusion of gravel and all-road capabilities in one extraordinary ride. This bike empowers us to conquer any terrain with newfound speed.Whether you're a competitive racer, long-distance enthusiast, or an adventurous explorer, this bike is tailored to meet your needs.
FEATURES
ACX carbon gravel frameset engineered for stiffness, comfort, and all-terrain performance
Shimano GRX Di2 2x12 electronic drivetrain delivering precise, instant shifting on any gradient
BLKTEC R8 fully integrated cockpit for aerodynamic performance and a clean, cable-free look
Novatec G24 tubeless-ready wheelset paired with carbon rims for responsive handling and durability
Maxxis Re-Fuse 700x32C tyres providing fast-rolling efficiency and confidence on mixed surfaces
Shimano GRX RX825 hydraulic brakes ensuring consistent stopping power in all conditions
Premium FIZIK Terra Argo X7 saddle and carbon seatpost for endurance comfort
SIZE GUIDE
S Frame Size 150 to 163cm Height
M Frame Size 163 to 175cm Height
L Frame Size 175 to 188cm Height
XL Frame Size 188 to 195cm Height
SPECIFICATIONS
Frame Material: ACX Gravel Carbon
Fork: Carbon rigid
Shifter: Shimano GRX Di2 ST-RX825, 2x12-speed brifter
Crankset: Shimano GRX FC-RX820, 48/31T
Cassette: Shimano Ultegra CS-R8101, 11–34T
Rear Derailleur: Shimano GRX Di2 RD-RX825
Bottom Bracket: Token T47, for 24 mm spindle
Chain: KMC New X-12
Saddle: Fizik Terra Argo X7
Seatpost: Carbon, 27.2 × 400 mm
Handlebar: BLKTEC R8 integrated, 400 mm (S, M) / 420 mm (L, XL), 31.8 mm integrated clamp, 125 mm rise/drop, 72 mm bend/reach
Stem: BLKTEC R8 integrated, 100 mm (S, M) / 110 mm (L, XL), 0° rise/drop
Headset: Token TK155P-36, sealed bearing, IS 52/28.6 | IS 52/40
Wheelset: Novatec G24 Disc (28 mm), tubeless tape installed
Wheel Size: 700C
Tyres: Maxxis Re-Fuse 700×32C
Rims:
Front: Carbon FV, height 28 mm, 622×24, 24H, tubeless-ready
Rear: Carbon FV, height 28 mm, 622×24, 24H, tubeless-ready
Hubs:
Front: Novatec D791SB, 12×100 mm, 24H, Center-Lock
Rear: Novatec D792SB, 12×142 mm, 24H, Center-Lock, for cassette sprocket
Spokes:
Front: Stainless double-butted 14G, NDS 282 mm / DS 284 mm, brass nipples
Rear: Stainless double-butted 14G, NDS 284 mm / DS 282 mm, brass nipples
Brake Lever: Shimano RX825
Brake Caliper: Shimano GRX RX825 hydraulic disc
Rotors: Shimano CL800, 160 mm
