Polygon Tambora AE GRX

2026 RoadGravel Electric bicycle Manufacturer page

Polygon Tambora AE GRX, color Metalic Brown

Last known price: $4,099

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 12 44t / 10–51t
Gear range: 510%
Battery: 400 Wh
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 150–164
MD 162–176
LG 174–189
XL 187–195

Components

15 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

carbon Not identified

Electric system

2 parts

Suspension

1 part

Fork

CARBON RIGID Not identified

Drivetrain

5 parts

Cassette
- Shimano Deore XT CS-M8100-12 12 speeds 10–51t
CS-M8100-12CS-M8100
Chain
- Shimano Deore CN-M6100
CN-M6100
Crankset
- FSA 44t
CK-220-IS
Rear derailleur
- Shimano GRX RD-RX822 12 speeds
RD-RX822
Shifters
- Shimano GRX
BR-RX820

Brakes

3 parts

Wheels and tires

5 parts

Front hub
- Novatec
Rear hub

CL-142 12x142mm 24H CL FOR MICROSPLINE Not identified

CL-142
Rims

CARBON FV H: 24 622x24 24H FOR TYRE 622-35/68 TLR Not identified
Spokes

F: STAINLESS 14G NDS:282 & DS:284 W/ NIPPLE BRASS / R: STAINLESS 14G NDS:282 & DS:280 W/ NIPPLE BRASS Not identified
Tires
- Schwalbe G-One Allround

Cockpit and contact points

4 parts

Handlebar
- FSA Energy
Headset
- FSA
Saddle
- Fizik
Seatpost

CARBON, DxL: 27.2 x 400mm Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 381mm

Stack 592mm

Wheelbase 1030mm

Head angle 71.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	367	381	395	409
Stackmm	566	592	626	649
Top tube lengthmm	523	550	580	607
Seat tube lengthmm	404	448	492	535
Head tube lengthmm	143	165	200	223
Head tube angle	70°	71.5°	71.7°	72°
Seat tube angle	74.5°	74°	73.5°	73°
Chainstay lengthmm	432	432	432	432
Wheelbasemm	1023	1030	1054	1073
Front centermm	603	610	634	652
Bottom bracket dropmm	77	77	77	77
Bottom bracket heightmm	283	283	283	283
Standover heightmm	718	758	799	835
Fork rakemm	50	49	50	50
Trailmm	74	65	63	61
Stack/reach ratio	1.54	1.55	1.59	1.59

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 44
Largest chainring: 44
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 25.0 in
Highest gear: 127.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 400 Wh

Additional specifications

Battery: BOSCH COMPACTTUBE 400 FIXED MOUNT HORIZONTAL
Wheel material: Carbon
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

25.0 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Highest gear

127.6 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Shifting

Mechanical

706 of 1,980 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2026
Sample: 1,980 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.6 km/h
Highest gear: 48.9 km/h

Total gear range 510%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 25.0–127.6 gear inches
Class reference (p10–p90): 22.8–127.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2026
Lowest gear: 1455 bicycles with this information, 73.2% of the class
Highest gear: 1455 bicycles with this information, 73.2% of the class