

















































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
SUSPENSION
DRIVETRAIN
E SYSTEM
BRAKES
WHEELS
CONTACT POINTS
*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
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.
Unboxing Your Bike Your Tambora AE-N - Carbon Gravel eBike
Bike Fit Setup
Tyre Pressure Setup
Unboxing Your Bike Your Tambora AE-N - Carbon Gravel eBike
Bike Fit Setup
Tyre Pressure Setup
