Polygon Bromo N8

2021 MountainEnduro Manufacturer page

Last known price: $6,199

Prices shown first for United States
Fork travel: 160 mm
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 155–166
MD 164–176
LG 174–186
XL 184–195

Components

15 of 17 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

ALX ENDURO FRAME Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- Shimano
DU-EP800
Cassette
- Shimano Deore CS-M6100 12 speeds 10–51t
CS-M6100
Chain
- Shimano Deore CN-M6100
CN-M6100
Crankset
- e*thirteen 34t
Rear derailleur
- Shimano Deore XT RD-M8100 12 speeds
RD-M8100
Shifters
- Shimano Deore XT SL-M8100
SL-M8100

Brakes

1 part

Brakes
- Shimano Deore XT BR-M8120
BR-M8120

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- Entity
Pedals

FLAT ALLOY W/ REPLACEABLE PIN Not identified
Saddle
- Entity
Seatpost
- Tranz-X
JD-YSP23JL
Stem
- Entity

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 470mm

Stack 631mm

Wheelbase 1234mm

Head angle 64.5°

Seat angle 77.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ 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	450	470	490	510
Stackmm	626	631	635	644
Top tube lengthmm	595	616	637	659
Seat tube lengthmm	400	410	420	430
Head tube lengthmm	100	105	110	120
Head tube angle	64.5°	64.5°	64.5°	64.5°
Seat tube angle	77°	77°	77°	77°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1212	1234	1256	1281
Front centermm	779	801	823	848
Bottom bracket dropmm	35	35	35	35
Bottom bracket heightmm	345	345	345	345
Standover heightmm	710	710	710	710
Fork rakemm	42	42	42	42
Trailmm	132	132	132	132
Stack/reach ratio	1.39	1.34	1.30	1.26

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: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 160 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 19.3 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.6″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

160 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 1,011 bicycles with this information
Coverage: 99.0% of the class

Lowest gear

19.3 gear inches

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Highest gear

98.6 gear inches

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2021
Sample: 892 bicycles with this information
Coverage: 87.3% of the class

Shifting

Mechanical

65 of 1,021 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2021
Sample: 1,021 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.4 km/h
Highest gear: 37.8 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: 19.3–98.6 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2021
Lowest gear: 892 bicycles with this information, 87.3% of the class
Highest gear: 892 bicycles with this information, 87.3% of the class