BULLS Copperhead FSX

Name: BULLS Copperhead FSX
Brand: BULLS

2021 MountainTrail Manufacturer page

BULLS Copperhead FSX, color Black Matt / Jubiläum

Price: Not published

Prices shown first for United States
Europe: €2,599 Last known price
Travel: 140 / 140 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Weight: 18.1 kg 39.9 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

41cm
44cm
48cm
51cm

The manufacturer did not publish rider heights for these sizes.

Components

18 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

Alloy Not identified

Suspension

2 parts

Drivetrain

5 parts

Cassette
- Shimano Deore CS-M6100-12 12 speeds 10–51t
CS-M6100-12
Chain
- KMC
Crankset
- Shimano FC-MT511-1 12 speeds 30t
FC-MT511
Rear derailleur
- Shimano Deore RD-M6100-SGS 12 speeds
RD-M6100-SGS
Shifters
- Shimano Deore SL-M6100-IR 12 speeds
SL-M6100-IR

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Handlebar
- Bulls
Headset

semi-integrated Not identified
Pedals
- Bulls
Saddle
- Bulls
Seatpost
- Limotec
Stem
- Bulls

Sizes and geometry

4 sizes Open in the geometry plotter

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

Size 44cm

Table

Reach 450mm

Stack 612mm

Wheelbase 1193mm

Head angle 66.5°

Seat angle 76.0°

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 Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	429	450	470	490
Stackmm	612	612	621	631
Top tube lengthmm	582	603	625	647
Seat tube lengthmm	410	440	480	510
Head tube lengthmm	110	110	120	130
Head tube angle	66.5°	66.5°	66.5°	66.5°
Seat tube angle	76°	76°	76°	76°
Chainstay lengthmm	436	436	436	436
Wheelbasemm	1173	1193	1218	1241
Front centermm	739	759	784	807
Bottom bracket dropmm	30	30	30	30
Bottom bracket heightmm	344	344	344	344
Fork rakemm	51	50	51	50
Trailmm	107	108	107	108
Stack/reach ratio	1.43	1.36	1.32	1.29

Not published by the manufacturer: Standover height, 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: 18.1 kg

39.9 lb

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 17.1 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

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

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

17.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

87.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.3 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: 17.1–87.0 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 / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle BULLS Copperhead FSX	BULLS Copperhead 1 27.5	BULLS Copperhead 1 29	BULLS Copperhead 2 27.5	BULLS Copperhead 2 29	BULLS Copperhead 2 Plus 27.5
Frame
Bicycle weight	18.1 kg	15.2 kg	15.2 kg	14.4 kg	14.4 kg	14.3 kg
Suspension
Suspension configuration	Full suspension	Hardtail	Hardtail	Hardtail	Hardtail	Hardtail
Front travel	140 mm	100 mm	100 mm	100 mm	100 mm	100 mm
Rear travel	140 mm	Not informed	Not informed	Not informed	Not informed	Not informed
Drivetrain
Front chainrings	1	Not informed	Not informed	2	2	3
Smallest chainring	30	Not informed	Not informed	26	26	22
Largest chainring	30	Not informed	Not informed	36	36	40
Rear sprockets	12	10	10	10	11	Not informed
Smallest sprocket	10	11	11	11	11	11
Largest sprocket	51	42	42	42	42	36
Lowest gear	17.1 in	Not informed	Not informed	17.0 in	18.0 in	16.8 in
Highest gear	87.0 in	Not informed	Not informed	90.0 in	94.9 in	100.0 in
Cockpit
Seatpost	Dropper seatpost	Not informed	Not informed	Not informed	Not informed	Rigid seatpost
Other specifications
Suspension	Full suspension	Hardtail	Hardtail	Hardtail	Hardtail	Hardtail
Wheel size	29″	27.5″	29″	27.5″	29″	27.5″
Fork spring	Not informed	Coil	Coil	Coil	Not informed	Coil
Bottom bracket standard	Not informed	Not informed	Not informed	Not informed	Not informed	BSA