Specialized Rockhopper Expert Disc

2010 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 26″
Drivetrain: 3 × 9 22–44t / 11–34t
Gear range: 618%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

14 of 23 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

Specialized M4 fully manipulated alloy frame, fully butted, ORE DT, externally relieved HT, forged dropouts w/ replaceable derailleur hanger, disc only Not identified

Suspension

1 part

Fork
- RockShox

Drivetrain

7 parts

Bottom bracket
- Shimano BB-ES25
BB-ES25
Cassette
- Shimano CS-HG50 11–34t
CS-HG50
Chain
- KMC X9 9 speeds
Crankset
- Shimano FC-M442
FC-M442
Front derailleur
- Shimano Deore
Rear derailleur
- SRAM X5 10 speeds
X-5
Shifters
- SRAM X5

Brakes

2 parts

Wheels and tires

5 parts

Front hub

Forged alloy, hi/low flange, double sealed, ground race, machined disc mount, 32h Not identified
Rear hub

Forged alloy, double sealed, ground race, machined disc mount, cassette, 32h Not identified
Rims
- Alex Rims
Spokes

2mm (14g) stainless Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar

Butted alloy riserbar, 25mm rise, 660mm wide, 8 degree back sweep, 7 degree up sweep Not identified
Headset

1-1/8"" threadless, loose ball Not identified
Pedals

Alloy body and cage, 9/16"" Not identified
Saddle
- Specialized
Seatpost

Alloy two bolt, 12.5mm offset, micro adjust, 30.9mm Not identified
Stem

3D forged alloy, 7 degree rise, 31.8mm clamp Not identified

Sizes and geometry

6 sizes Open in the geometry plotter

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

Size 17"

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 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Top tube lengthmm	545	565	590	615	640	660
Seat tube lengthmm	330	381	432	483	533	584
Head tube lengthmm	100	100	110	120	140	160
Head tube angle	70°	70°	70°	70°	70°	70°
Seat tube angle	73°	73°	73°	73°	73°	73°
Chainstay lengthmm	426	426	426	426	426	426
Wheelbasemm	1029	1049	1075	1101	1127	1148
Front centermm	606	626	652	678	704	725
Bottom bracket dropmm	39	39	39	39	39	39
Bottom bracket heightmm	304	304	304	304	304	304
Standover heightmm	693	725	767	800	836	872
Suspension and parts
Crank lengthmm	170	170	175	175	175	175
Handlebar widthmm	640	640	640	640	640	640
Stem lengthmm	60	60	75	75	90	90
Seatpost lengthmm	350	350	350	400	400	400

Not published by the manufacturer: Reach, Stack, Fork rake, Trail, Stack/reach ratio, Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 44
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 16.8 in
Highest gear: 104.0 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″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

2 measures

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

Lowest gear

16.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2010
Sample: 186 bicycles with this information
Coverage: 75.6% of the class

Highest gear

104.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2010
Sample: 186 bicycles with this information
Coverage: 75.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 39.8 km/h

Total gear range 618%

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: 16.8–104.0 gear inches
Class reference (p10–p90): 16.8–116.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2010
Lowest gear: 186 bicycles with this information, 75.6% of the class
Highest gear: 186 bicycles with this information, 75.6% 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 2010 builds

Differences across 2010 builds
Specification	This bicycle Specialized Rockhopper Expert Disc	Specialized Rockhopper	Specialized Rockhopper Comp Disc	Specialized Rockhopper Comp Disc 29	Specialized Rockhopper Expert 29	Specialized Rockhopper SL
Suspension
Front travel	100 mm	100 mm	100 mm	80 mm	80 mm	100 mm
Drivetrain
Largest chainring	44	42	42	42	44	44
Rear sprockets	9	8	8	8	9	9
Largest sprocket	34	32	32	32	34	34
Lowest gear	16.8 in	17.9 in	17.9 in	19.9 in	18.8 in	16.8 in
Highest gear	104.0 in	99.3 in	99.3 in	110.7 in	116.0 in	104.0 in
Brakes
Brake type	Hydraulic disc	Rim brake	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc
Other specifications
Wheel size	26″	26″	26″	29″	29″	26″