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Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
Polygon Tambora AE-N Carbon - eGravel Bike
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Description




ULTIMATE CARBON EXPLORER

From remote gravel trails to the fast lane of your daily commute, the Tambora E transforms every ride into an open invitation to explore without limits. Its lightweight carbon frame and stiff chain stays maximize power transfer, while dropped seat stays enhance comfort and compliance across rough terrain.

PERFORMANCE LINE SPRINT

This compact drive unit disappears into the frame - weighing just 4.4 lbs, it’s Bosch’s lightest drive yet, but it packs up to 600W & 55NM of smooth, responsive support. Start pedaling and feel the support: sensitive, quiet, and direct. A natural riding sensation combined with the benefits of the eBike.

650WH TOTAL RANGE

The Tambora E comes with two batteries: a slim, integrated 400WH main battery weighing just 2kg, and a 250WH range extender the size of a water bottle. Designed to help you breeze past obstacles, conquer climbs, and battle the wind, the Polygon Tambora E lets you go farther and faster.

CONTEMPORARY COMPONENTS

The Tambora E features a wide-range 12-speed drivetrain and powerful hydraulic brakes, giving you confidence on technical climbs and fast descents. Paired with wide carbon wheels and grippy tyres, it delivers better traction, a smoother ride, and the control you need to tackle any adventure easily.

SHIMANO GRX 820 SERIES

Bosch’s Performance Line SX motor and paired with the Compact Tube 400 battery. Offering assist of up to 45 km/h with 55 Nm of torque with range up to 119 km.

NOVATEC G24 PRO CARBON WHEELSET

Built for gravel, this wheelset balances stiffness and compliance. Its 24mm internal tubeless-ready rims support wide tyres, while the rear hub’s Dual Ratchet System enhances durability, strength, and responsiveness compared to traditional pawl systems.

SCHWALBE G-ONE ALLROUND 700x40C

Smooth and versatile, the Schwalbe G-One Allround 700x40C rolls fast with minimal vibration while maintaining grip on gravel and dry trails. Tubeless-ready and lightweight, it’s built for efficiency across mixed terrain.

FLIP-CHIP CARBON FORK

The full carbon fork ensures stability and comfort on any terrain, while the flip chip lets you adjust the geometry to match your riding style. Fine-tune the head angle and bottom bracket height for optimal performance on trails or city streets.

BOSCH PERFORMANCE LINE SPRINT

Bosch’s Performance Line Sprint motor, paired with the Compact Tube 400 battery, delivers smooth and efficient e-assist up to 28 mph with 55 Nm of torque. With a range of up to 75 miles, it’s built for long rides on gravel, urban streets, or light trails.

Components

FRAMESET
FRAME
ACX Carbon Gravel Frame
HEADSET
FSA NO.55R 1.5"/CR/LS, IS 52/28.6 | IS 52/40
SUSPENSION
FORK
Full Carbon, Steerer: Taper 1-1/8" to 1-1/2", Brake Type: Disc Brake Flat 140mm, Hub Spacing: 12x100mm for TA M12x1.5 L:120mm
DRIVETRAIN
REAR DERAILLEUR
Shimano GRX RD-RX822 12-Speed
SHIFTER
Shimano GRX BR-RX820 12-Speed Brifter
CRANK
FSA CK-220-IS Megatooth SH 44T, Max Chainring: 44T, Arm Length: FSA CK-220/IS/SX 170mm
CHAINRING
Included in Crankset
CASSETTE
Shimano CS-M8100 XT 12-Speed 10-51T Microspline
CHAIN
Shimano CN-M6100 12-Speed
E SYSTEM
BATTERY
Bosch Performance Line Sprint 400Wh & Powermore 250Wh Range Extender
MOTOR
Bosch Performance Line Sprint BDU3184
DISPLAY
Bosch System Controller BRC3100
SWITCH
Bosch Mini Remote RC3310, On/Off Switch: Bosch System Controller BRC3100
BRAKES
FRONT BRAKE
Shimano GRX Hydraulic, Lever: Shimano GRX ST-RX820
REAR BRAKE
Shimano GRX Hydraulic, Lever: Shimano GRX ST-RX820
ROTOR
Shimano RT-CL800 Centerlock 160mm
WHEELS
FRONT HUB
Novatec D791 12x100mm 24H CL
REAR HUB
CL-142 12x142mm 24H CL for Microspline
RIM
Novatec G24 Disc (28mm) with Tubeless Tape Installed, Rim: Carbon FV H: 24 622x24 24H for Tyre 622-35/68 TLR
TYRE
Schwalbe G-One 700C-40 622x40 Allround Tire TLE Addix
MAX TYRE SIZE
700Cx45
INNER TUBE
Tubeless Tape Installed
CONTACT POINTS
SADDLE
Fizik Terra Argo, Steel ø 7mm
SEATPOST
Carbon, DXL: 27.2 x 300mm (S), 27.2 x 350mm (M-XL), Seatpost Clamp: Alloy Integrated
HANDLEBAR
FSA Energy Super Compact, Width: 400mm (S-M), 420mm (L-XL), Rise: 120mm, Bend: N/A, Bar Bore: 31.8mm
STEM
Vision NS SMR-II ST, Extension: 90mm (S-M), 100mm (L-XL), Bar Bore: 31.8mm, Rise/Drop: 10 degrees

*Specs subject to change based on availability

Geometry

 

Frame Size S M L XL
Rider Height (cm) 157 – 173 cm 168 – 180 cm 173 – 190 cm 185 – 196 cm
Rider Height (ft/in) 5'2" – 5'8" 5'6" – 5'11" 5'8" – 6'3" 6'1" – 6'5"
A Seat Tube Length 404 448 492 535
B Seat Tube Angle 74.5° 74° 73.5° 73°
C Effective Seat Tube Angle 74.5° 74° 73.5° 73°
D Head Tube Length 143 165 200 223
E Head Tube Angle 70° 72° 72° 72°
F Effective Top Tube 523 550 580 607
G BB Height 283 283 283 283
H BB Offset 77 77 77 77
I Chainstay Length 432 432 432 432
J Wheelbase 1023 1030 1054 1073
K Frame Reach 367 381 395 409
L Frame Stack 566 592 626 649
M Standover Height 718 758 799 835

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 Your Tambora AE-N - Carbon Gravel eBike

Step 2

Bike Fit Setup

Step 3

Tyre Pressure Setup

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