BMC Fourstroke TWO

2023 MountainCross-country Manufacturer page

Last known price: $6,999

Prices shown first for United States
Travel: 100 / 100 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Weight: 11.84 kg 26.1 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM Not informed
MD 171–182
LG 180–189
XL 187+

Components

17 of 19 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

Fourstroke Carbon | APS Suspension System | 100mm Travel | Fully Guided Internal Cable Routing | Post Mount Disc | 12 x 148mm Boost Thru-Axle Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- Shimano Deore XT CS-M8100 12 speeds 10–51t
CS-M8100
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano Deore XT FC-M8100 12 speeds 34t
FC-M8100
Rear derailleur
- Shimano Deore XT RD-M8100 12 speeds
RD-M8100
Shifters
- Shimano Deore XT SL-M8100-R 12 speeds
SL-M8100

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

4 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 457mm

Stack 592mm

Wheelbase 1171mm

Head angle 66.5°

Seat angle 75.6°

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
Frame
Reachmm	437	457	477	500
Stackmm	584	592	600	615
Top tube lengthmm	574	597	621	649
Seat tube lengthmm	420	440	470	510
Head tube lengthmm	84	93	101	118
Head tube angle	66.5°	66.5°	66.5°	66.5°
Seat tube angle	75.6°	75.6°	75.6°	75.6°
Chainstay lengthmm	432	432	432	432
Wheelbasemm	1139	1171	1188	1218
Front centermm	714	738	762	791
Bottom bracket dropmm	53	53	53	53
Bottom bracket heightmm	321	321	321	321
Standover heightmm	725	725	725	725
Fork rakemm	44	44	44	44
Trailmm	113	113	113	113
Stack/reach ratio	1.34	1.30	1.26	1.23
Suspension and parts
Crank lengthmm	165	170	175	175
Handlebar widthmm	750	760	760	760
Stem lengthmm	50	60	60	70
Stem angle	-5°	-5°	-5°	-5°
Seatpost lengthmm	400	400	420	420

Not published by the manufacturer: Front travel, Rear travel and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Bicycle weight: 11.84 kg

26.1 lb
Weight limit: 110 kg

242.5 lb

Suspension

Suspension configuration: Full suspension
Front travel: 100 mm
Rear travel: 100 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

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.35″
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

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 1,907 bicycles with this information
Coverage: 95.2% of the class

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 1,578 bicycles with this information
Coverage: 78.8% of the class

Highest gear

98.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 1,578 bicycles with this information
Coverage: 78.8% of the class

Shifting

Mechanical

223 of 2,002 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2023
Sample: 2,002 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): 17.7–101.5 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2023
Lowest gear: 1578 bicycles with this information, 78.8% of the class
Highest gear: 1578 bicycles with this information, 78.8% 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 2023 builds

Differences across 2023 builds
Specification	This bicycle BMC Fourstroke TWO	BMC Fourstroke 01 LTD	BMC Fourstroke 01 ONE	BMC Fourstroke 01 Team	BMC Fourstroke 01 TWO	BMC Fourstroke Four
Frame
Bicycle weight	11.84 kg	10.92 kg	11 kg	10.3 kg	11.72 kg	12.4 kg
Fork material	Not informed	Not informed	Not informed	Carbon	Not informed	Not informed
Suspension
Front travel	100 mm	100 mm	100 mm	120 mm	100 mm	100 mm
Drivetrain
Smallest chainring	34	34	Not informed	34	Not informed	Not informed
Largest chainring	34	34	Not informed	34	Not informed	Not informed
Smallest sprocket	10	10	Not informed	Not informed	10	Not informed
Largest sprocket	51	52	Not informed	Not informed	50	Not informed
Lowest gear	19.3 in	19.0 in	Not informed	Not informed	Not informed	Not informed
Highest gear	98.6 in	98.6 in	Not informed	Not informed	Not informed	Not informed
Cockpit
Seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Rigid seatpost
Shifting	Mechanical	Electronic	Electronic	Electronic	Electronic	Mechanical
Other specifications
Bottom bracket standard	BSA	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Fork spring	Air	Air	Not informed	Not informed	Not informed	Not informed
Tire width	2.35″	2.35″	2.35″	2.4″	2.35″	2.35″
Wheel material	Aluminum	Carbon	Carbon	Aluminum	Aluminum	Aluminum