HEAD X-Rubi IV

2022 MountainCross-country

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–51t
Gear range: 510%
Weight: 12.8 kg 28.2 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

44cm
48cm
52cm
56cm

The manufacturer did not publish rider heights for these sizes.

Components

10 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

Alloy 6061 HT, TB, TPR Not identified

Suspension

1 part

Fork
- RockShox Judy

Drivetrain

4 parts

Cassette
- Shimano Deore CS-M6100 12 speeds
CS-M6100
Crankset
- Shimano Deore FC-M6100 12 speeds
FC-M6100
Rear derailleur
- Shimano SLX RD-M7100 12 speeds
RD-M7100
Shifters
- Shimano SLX SL-M7100
SL-M7100

Brakes

1 part

Brakes
- Shimano BL-MT201
BL-MT201

Wheels and tires

4 parts

Front hub

HBC Pro 15x110mm Not identified
Rear hub

HBC Pro 142x12mm micro spline Not identified
Rims
- Weinmann
Tires
- Schwalbe Rapid Rob

Cockpit and contact points

6 parts

Handlebar

HBC Pro 720/35mm R-Film Not identified
Headset
- Neco
Pedals
- Wellgo
Saddle

HBC Pro VL-3381 Not identified

VL-3381
Seatpost

HBC Pro 350-400/31.6mm R-Film Not identified
Stem

HBC Pro 70-100/35mm R-Film Not identified

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 48cm

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	581	606	615	625
Seat tube lengthmm	440	480	520	560
Head tube lengthmm	—	120	130	140
Head tube angle	70°	70°	70°	70°
Seat tube angle	72°	72°	72°	72°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1080	1105	1115	1125
Front centermm	648	673	683	693
Bottom bracket dropmm	65	65	65	65
Bottom bracket heightmm	309	309	309	309

Not published by the manufacturer: Reach, Stack, Standover height, Fork rake, Trail, Stack/reach ratio, 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: 12.8 kg

28.2 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 18.2 in
Highest gear: 92.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2.25″
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: 2022
Sample: 1,587 bicycles with this information
Coverage: 93.1% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2022
Sample: 1,333 bicycles with this information
Coverage: 78.2% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2022
Sample: 1,333 bicycles with this information
Coverage: 78.2% of the class

Shifting

Mechanical

127 of 1,694 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2022
Sample: 1,694 bicycles with this information
Coverage: 99.4% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 35.5 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: 18.2–92.8 gear inches
Class reference (p10–p90): 17.7–100.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2022
Lowest gear: 1333 bicycles with this information, 78.2% of the class
Highest gear: 1333 bicycles with this information, 78.2% 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 2022 builds

Differences across 2022 builds
Specification	This bicycle HEAD X-Rubi IV	HEAD X-Rubi Cross	HEAD X-Rubi I	HEAD X-Rubi II	HEAD X-Rubi III	HEAD X-Rubi Lady
Frame
Intended fit	Unisex	Unisex	Unisex	Unisex	Unisex	womens
Bicycle weight	12.8 kg	13.7 kg	13.9 kg	13.6 kg	13.1 kg	13.6 kg
Drivetrain
Front chainrings	1	3	2	2	1	2
Smallest chainring	32	24	22	26	32	26
Largest chainring	32	42	36	36	32	36
Rear sprockets	12	10	9	10	12	10
Smallest sprocket	10	11	11	11	10	11
Largest sprocket	51	36	36	42	51	42
Lowest gear	18.2 in	19.3 in	17.7 in	18.0 in	18.2 in	18.0 in
Highest gear	92.8 in	110.7 in	94.9 in	94.9 in	92.8 in	94.9 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc	Mechanical disc	Hydraulic disc	Mechanical disc
Other specifications
Fork spring	Coil	Not informed	Air	Air	Coil	Air
Tire width	2.25″	1.6″	2.1″	2.1″	2.25″	2.1″
Wheel size	29″	700c	29″	29″	29″	29″