Bergamont Bergamonster 20 purple

2025 YouthMountain youth Manufacturer page

Bergamont Bergamonster 20 purple, color Shiny Metallic Purple

Price: Not published

Prices shown first for United States
United Kingdom: £299 Last known price
Fork travel: 40 mm
Wheels: 20″
Drivetrain: 1 × 7 36t / 13–34t
Gear range: 262%
Weight: 11.2 kg 24.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

19 of 22 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

20", lite AL-6061 tubing Not identified

AL-6061

Suspension

1 part

Fork
- SR Suntour XCT-JR-L

Drivetrain

6 parts

Bottom bracket

Sealed cartridge, BSA Not identified
Cassette
- SunRace 13–34t
MF-M300
Chain
- KMC Z7 7 speeds
Crankset
- Prowheel 36t
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano SL-RS36
SL-RS36

Brakes

2 parts

Brake levers
- Tektro
Brakes
- Tektro

Wheels and tires

5 parts

Front hub
- BGM
Rear hub
- BGM
Rims
- Shining
V-6NS
Spokes

steel, black Not identified
Tires
- Kenda Booster

Cockpit and contact points

7 parts

Grips
- BGM
Handlebar
- BGM
Headset
- BGM
FP-H807
Pedals
- Marwi
SP-700
Saddle
- Syncros
Seatpost
- BGM
Stem
- BGM

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Geometry diagram unavailable

The drawing needs head tube angle and seat tube angle, which the manufacturer did not publish. Available facts remain in the table.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Reachmm	323
Stackmm	427
Top tube lengthmm	450
Seat tube lengthmm	280
Head tube lengthmm	100
Chainstay lengthmm	370
Wheelbasemm	892
Front centermm	523
Bottom bracket dropmm	20
Standover heightmm	534
Fork rakemm	40
Stack/reach ratio	1.32

Not published by the manufacturer: Head tube angle, Seat tube angle, Bottom bracket height, Trail, 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
Bicycle weight: 11.2 kg

24.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 40 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 7
Smallest sprocket: 13
Largest sprocket: 34
Lowest gear: 21.2 in
Highest gear: 55.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Coil
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 20″

Technical analysis

3 measures

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

Lowest gear

21.2 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Highest gear

55.4 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Shifting

Mechanical

10 of 367 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 367 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.1 km/h
Highest gear: 21.2 km/h

Total gear range 261%

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: 21.2–55.4 gear inches
Class reference (p10–p90): 14.0–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2025
Lowest gear: 257 bicycles with this information, 70.0% of the class
Highest gear: 257 bicycles with this information, 70.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds
Specification	This bicycle Bergamont Bergamonster 20 purple	Bergamont Bergamonster 20 blue	Bergamont Bergamonster 20 Plus blue	Bergamont Bergamonster 20 Plus yellow	Bergamont Bergamonster St. Pauli
Frame
Bicycle weight	11.2 kg	11.2 kg	10.2 kg	10.2 kg	9.1 kg
Fork material	Not informed	Not informed	Aluminum	Aluminum	Aluminum
Suspension
Suspension configuration	Hardtail	Hardtail	Rigid	Rigid	Rigid
Front travel	40 mm	40 mm	Not informed	Not informed	Not informed
Drivetrain
Smallest chainring	36	36	32	32	36
Largest chainring	36	36	32	32	36
Rear sprockets	7	7	8	8	7
Smallest sprocket	13	13	11	11	13
Lowest gear	21.2 in	21.2 in	18.8 in	18.8 in	21.2 in
Highest gear	55.4 in	55.4 in	58.2 in	58.2 in	55.4 in
Brakes
Brake type	Rim brake	Rim brake	Mechanical disc	Mechanical disc	Rim brake
Other specifications
Fork spring	Coil	Coil	Not informed	Not informed	Not informed
Suspension	Hardtail	Hardtail	Rigid	Rigid	Rigid
Tire width	2.2″	2.2″	2.6″	2.6″	1.95″