Details
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.
Specs
| 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 | 44T |
| 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 |
Geo
| 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 |
Build
Polygon Tambora AE-N Carbon - eGravel Bike
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.
Unboxing Your Bike Your Tambora AE-N - Carbon Gravel eBike
Bike Fit Setup
Tyre Pressure Setup