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Description

ULTIMATE CARBON EXPLORER

The Tambora AE combines a carbon frame with a stiff chainstay design for enhanced power transfer, complemented by dropped seatstays to elevate comfort and compliance. Whether you're venturing off the beaten path or enhancing your daily commute, it's your ticket to boundless exploration.​

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.

SRAM GX EAGLE AXS

Wireless, durable, and built for the trail. Delivering smooth shifting across any terrain. AXS technology allows easy customization, while the Overload Clutch protects the derailleur from impacts. Experience precise, high-performance shifting with GX Eagle AXS.

NOVATEC G24 PRO CARBON WHEELSET

Built for gravel, the Novatec G24 Pro Carbon Wheelset balances stiffness and compliance with its 30mm wide, 28mm deep carbon rims. The DRS hubs ensure efficient power transfer, while the tubeless-ready design keeps the ride smooth and fast across any terrain.

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
Carbon Fork, Rigid Steerer: Taper 1-1/8" to 1-1/2"
DRIVETRAIN
REAR DERAILLEUR
SRAM GX Eagle AXS, 12-Speed
SHIFTER
SRAM Rival eTap AXS, 1x12-Speed
CRANK
FSA Megatooth A, 44T
CHAINRING
FSA Megatooth A, 44T
CASSETTE
SRAM GX Eagle, 10-52T
CHAIN
SRAM GX Eagle 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
BRAKES
FRONT BRAKE
SRAM Rival Hydraulic Disc
REAR BRAKE
SRAM Rival Hydraulic Disc
ROTOR
SRAM Paceline 160mm
WHEELS
FRONT HUB
Novatec D791 12x100mm 24H CL
REAR HUB
Novatec D792 12x142mm 24H CL for XDR
RIM
Carbon FV H: 28 622x24 24H
TYRE
Schwalbe G-One 700x40C
MAX TYRE SIZE
700Cx45
CONTACT POINTS
SADDLE
Fizik Terra Argo, Steel ø 7mm
SEATPOST
Carbon DXL: 27.2x300mm (S), 27.2x350mm (M-XL)
HANDLEBAR
FSA Energy Super Compact, Width: 400mm (S-M), 420mm (L-XL)
STEM
Vision NS SMR-II ST, Extension: 90mm (S-M), 100mm (L-XL)
WEIGHT
BIKE WEIGHT
32 lbs (Size L w/ pedals)

*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