Skip to content

One Bike Sold = One Tree Planted

Be smart, shop before the increases

Save even more with Truemed!

USA USA ▾
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
Polygon Tambora G8X 700c - Carbon Gravel Bike
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt

Description

RACE OR ESCAPE

Whether you plan to race your heart out in the burgeoning gravel race scene or just escape the daily grind, Tambora has you covered. The Tambora transforms between a race-ready gravel grinder and an aggressive roadie. Coming spec’d with Polygon’s super lightweight ACX carbon fibre frame and fork, quality contact points, SRAM components, and a tubeless-ready set-up.

FLIP-CHIP FREEDOM

The Polygon Tambora’s versatile flip-chip design allows you to tailor your ride to the terrain. Go short and sharp for race-day agility or longer and slacker for comfort on epic adventures. With ample mounts for bottles, racks, and mudguards, plus space for 45mm tyres, the Tambora is your versatile gravel companion, ready for any adventure you throw at it.

30 YEARS OF EXPERIENCE

Leveraging 30 years of experience crafting championship-winning road and mountain bikes, Polygon brings its performance-driven engineering and vertically integrated manufacturing to the gravel world. The Tambora is a testament to this legacy, boasting durability, reliability, and a 5-year warranty for peace of mind on any adventure.

INDUSTRY REVIEW

"The Polygon Tambora is an impressively versatile bike!" - 99 Spokes

CARBON FRAM EFFICIENCY

The Tambora G8Xs lightweight carbon frame provides a stiff and responsive platform for efficient power transfer, while amble clearance for 45c tires provides ample comfort and grip on long offroad adventure

SRAM RIVAL eTAP AXS

Experience the pinnacle of wireless electronic shifting with the SRAM Rival eTap AXS 1x12 drivetrain with 10-44T castte. Its intuitive design and lightning-fast shifts make it a game-changer for gravel riding.

SRAM RIVAL HYDRAULIC BRAKES

SRAM Rival hydraulic disc brakes deliver powerful and predictable stopping power, with excellent modulation for precise control in all conditions.

FLIP THE SWITCH

The Tambora G8x features a flip chip that allows you to adjust the geometry of the bike, choosing between a more stable or agile setup to match your riding style and terrain. Better yet there's even the ability to run a front derailleur for even more adaptability

CARBON WHEELS

The Tambora G8X's Novatec G24 carbon wheels are lightweight and stiff, providing a responsive and efficient ride on any surface. Their tubeless-ready design pairs perfectly with the Vee Tire Co. Rail Frenzy 700x40C tires, offering a smooth, supple feel and excellent grip on both gravel and pavement.

Components

FRAMESET
FRAME
ACX Gravel Frame, Internal Cable Routing, BB86 Press Fit BB, 12x142mm Thru-Axle, Flat Mount Disc, Sram UDH
SUSPENSION
FORK
Polygon Full Carbon Rigid fork, Flat Disc Brake, 12x100mm
DRIVETRAIN
REAR DERAILLEUR
Sram Rival XPLR ETAP AXS, 12-Speed
SHIFTER
Sram Rival ETAP AXS, 12-Speed Shifter
CRANK
Sram Rival 1 Wide 42T, 170mm
CASSETTE
Sram XG-1251, 10-44T, 12-Speed
CHAIN
Sram Rival, 12-Speed
BRAKES
FRONT BRAKE
Sram Rival, Hydraulic Disc Brake, 160mm Rotor
REAR BRAKE
Sram Rival, Hydraulic Disc Brake, 160mm Rotor
WHEELS
REAR HUB
Novatec G24 Disc, 12X142mm, 24H, Novatec D792, 6 Bolt Hub
RIM
Novatec G24 Disc Carbon 28mm Internal Width, Tubeless Tape Installed
TYRE
Vee Tire Co. Rail, 700x40C, 622x40, *Tubeless Ready
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 Carbon, 27.2 x 300mm (S,M,L) / 27.2 x 350mm (XL)
STEM
Entity Expert, 31.8mm Clamp, 7-Degree, 90mm (S,M) / 100mm (L, XL)
WEIGHT
BIKE WEIGHT
21lbs (Size M)

Geometry

  S M L XL
Rider Height (ft in) 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 Bike

Step 2

Bike Fit Setup

Step 3

Tyre Pressure Setup

Compare this bike

Polygon Siskiu D24 - Kids Mountain Bike
Siskiu D24
$999.99
  • Description
    The Polygon Siskiu D24 is the perfect full-suspension mountain bike for young riders ready to conquer the trails. Upgraded for 2024 with hydraulic disc brakes, this bike also boasts a lightweight frame, adjustable air suspension, and reliable components - it's built for fun and progression.
  • FRAMESET
    frame
    ALX XC Trail Kids 6061 Aluminum Frame, 120mm Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded BB, ISCG05 Chain Guide, 142x12mm Thru-Axle
    headset
    N/A
  • SUSPENSION
    fork
    Suntour Raidon 32, Air Spring, 120mm Travel, Rebound, Lockout, Q-LOC2 Axle 15x100mm
    shock
    Suntour Raidon R, Air Spring, Rebound, Custom Tune
  • DRIVETRAIN
    rear derailleur
    Microshift Acolyte RD-M5185M, Medium Cage, Clutch
    front derailleur
    N/A
    shifter
    Microshift Acolyte Trigger SL-M7180M, 1x8-speed
    crank
    Prowheel C10Y-NW, 30T, 140mm
    chainring
    N/A
    cassette
    Microshift Acolyte CS-H083, 8-speed, 12-42T
    chain
    KMC Z8
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Tambora G8X 700c - Carbon Gravel Bike
Tambora G8X
$2,799.99
  • Description
    Whether you plan to race your heart out in the burgeoning gravel race scene or just escape the daily grind, Tambora has you covered. Flip the switch, and the Tambora transforms between a race-ready gravel grinder and an aggressive roadie. Coming spec’d with Polygon’s super lightweight ACX carbon fibre frame and fork, quality contact points, SRAM components and a tubeless-ready set-up.
  • FRAMESET
    frame
    ACX Gravel Frame, Internal Cable Routing, BB86 Press Fit BB, 12x142mm Thru-Axle, Flat Mount Disc, Sram UDH
    headset
    N/A
  • SUSPENSION
    fork
    Polygon Full Carbon Rigid fork, Flat Disc Brake, 12x100mm
    shock
    N/A
  • DRIVETRAIN
    rear derailleur
    Sram Rival XPLR ETAP AXS, 12-Speed
    front derailleur
    N/A
    shifter
    Sram Rival ETAP AXS, 12-Speed Shifter
    crank
    Sram Rival 1 Wide 42T, 170mm
    chainring
    N/A
    cassette
    Sram XG-1251, 10-44T, 12-Speed
    chain
    Sram Rival, 12-Speed
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Polygon Premier 24 XC - Kids Mountain Bike
Premier 24 XC
$399.99
  • Description
    The Polygon Premier 24” XC features a lightweight aluminum frame, Suntour Suspension, Shimano Tourney 1x7-Speed, V-brakes and Kenda Small Block 8 tires.
  • FRAMESET
    frame
    AL6 6061 Aluminium, Kids Specific Geometry, 135mm Rear Hub, Replaceable Derailleur Hanger
    headset
    N/A
  • SUSPENSION
    fork
    Suntour M3010, 50mm Suspension Travel, Soft-Tuned Coil Spring
    shock
    N/A
  • DRIVETRAIN
    rear derailleur
    Shimano Tourney RD-TZ31A, 7-Speed
    front derailleur
    N/A
    shifter
    Shimano Tourney SL-RS25, Revo Shifter with Optical Gear Display, 7-Speed
    crank
    Prowheel A102PP Alloy Arms, 3/32" Steel Chainring with Plastic Double Chain Guard, 32T
    chainring
    N/A
    cassette
    7-Speed Freewheel 14-28T
    chain
    KMC HV500, 7-Speed
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Siskiu D6 SE - Mountain Bike
Siskiu D6 SE
$1,299.99
  • Description
    The Polygon Siskiu D6 is a versatile full-suspension xc/trail bike designed for riders seeking performance and value. Featuring 120mm of travel, Shimano Deore 1x10 drivetrain with a wide 11-42T cassette, dropper post, and hydraulic disc brakes, it's ready to hit some singletrack!
  • FRAMESET
    frame
    ALX XC Trail Frame BSA Threaded 73mm Internal
    headset
    N/A
  • SUSPENSION
    fork
    Suntour XCM Boost 120mm Travel, Preload Adjuster, Lockout, Rebound Adjust 15X110mm Q-loc Thru Axle
    shock
    Suntour Raidon Lo, Air Spring, Lockout, 190x45mm
  • DRIVETRAIN
    rear derailleur
    Shimano Deore RD-M5120 Direct Attach 10-Speed
    front derailleur
    N/A
    shifter
    Shimano Deore SL-M4100, 10-Speed Trigger
    crank
    Shimano Deore FC-M5100-1 32T Two-Piece-Crank
    chainring
    N/A
    cassette
    Shimano Deore CS-M4100 10-42T 10-Speed
    chain
    KMC X10-1, 10-Speed
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Siskiu T8 - Mountain Bike
Siskiu T8
$1,999.99
  • Description
    The Polygon Siskiu T8 is the ultimate all-mountain shredder, boasting 135/140mm of travel, a playful trail geometry, and a capable Fox Float DPS/34 Rhythm suspension combo. Shimano's SLX 12-speed drivetrain and 4-piston brakes deliver reliable performance for conquering any trail.
  • FRAMESET
    frame
    ALX Trail 6061 Aluminium Frame, One Piece Unibody Pivot Bridge 140/135mm Travel (29"), Dropper Post and Rear Derailleur Routing, Direct Post-Mount Disc Brake, 148x12mm Boost Thru-Axle, Threaded BB, ISCG 05 Tabs
    headset
    N/A
  • SUSPENSION
    fork
    Fox 34 Rhythm, Grip Damper, Rebound & Sweep Adjust, 150/140mm Travel (29"), 110x15mm Kabolt Boost Axle
    shock
    Fox Float DPS Performance Series EVOL LV, 2-Position, 210x55mm
  • DRIVETRAIN
    rear derailleur
    Shimano SLX RD-M7100, 12-Speed
    front derailleur
    N/A
    shifter
    Shimano SLX SL-M7100, 12-Speed
    crank
    Shimano FC-MT-510-1
    chainring
    32T
    cassette
    Sunrace CSMZ-800, 11-51T, 12-Speed
    chain
    KMC X-12
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Relic 24 - Kids Mountain Bike
Relic 24
$499.99
  • Description
    The Polygon Relic 24” features a lightweight AL6 aluminum frame, Zoom HL 60mm suspension fork, Shimano Tourney 1x8-speed, disc brakes, and VeeTire Co. XCV tires.
  • FRAMESET
    frame
    AL6 Alloy Youth, 24" Wheels, IS Seatstay Disc Mount, 135mm Dropouts
    headset
    N/A
  • SUSPENSION
    fork
    Zoom HL, 60mm Travel, Alloy Crown & Lower, Coil Spring, Straight 1-1/8" Steerer, QR x 100mm
    shock
    Shimano Tourney SL-RS45, Revo Shifter with Optical Gear Display, 8-Speed
  • DRIVETRAIN
    rear derailleur
    Shimano RD-TX800-SGS, Direct Attach
    front derailleur
    N/A
    shifter
    Shimano Tourney SL-RS45, Revo Shifter with Optical Gear Display, 8-Speed
    crank
    Prowheel A105PP 32T, 152mm
    chainring
    N/A
    cassette
    Shimano HG200, 8 Speed, 12-32T
    chain
    KMC Z-8.3
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Customer Reviews
0.0 Be the first to review this item
5 ★
0% 
0
4 ★
0% 
0
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Loading more...