Specialized Rockhopper

2012 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

13"
15.5"
17.5"
19"
21"
23"

The manufacturer did not publish rider heights for these sizes.

Components

15 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, disc only, externally relieved HT, forged dropouts w/ replaceable derailleur hanger Not identified

Suspension

1 part

Fork
- SR Suntour
DS-26-LO

Drivetrain

7 parts

Brakes

2 parts

Brake levers
- Tektro
Brakes
- Tektro

Wheels and tires

5 parts

Front hub
- Formula
Rear hub

SBC rear disc hub, cassette, QR axle, double-sealed loose ball, polished races, machined disc mount and flanges, 19mm contact, 32h Not identified
Rims
- Alex Rims
Spokes

Stainless, 2.0mm (14g) Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar

XC riser bar, double butted alloy, 8º backsweep, 6º upsweep, 31.8mm Not identified
Headset

Integrated 1-1/8"" threadless, Campy-style, full cartridge bearings Not identified
Pedals

Composite plastic body, loose ball w/ reflectors Not identified
Saddle
- Specialized
Seatpost

Alloy, 2 bolt head, 30.9mm, 12.5mm offset, micro adjust Not identified
Stem

3D forged 6061 alloy, 4 bolt clamp, 7º rise, 31.8mm 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 17.5"

Table

Reach 416mm

Stack 588mm

Wheelbase 1085mm

Head angle 70.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 26″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	359	399	416	432	452	466
Stackmm	563	563	588	597	616	634
Top tube lengthmm	545	571	596	615	640	660
Seat tube lengthmm	330	394	445	483	533	584
Head tube lengthmm	120	120	130	140	160	180
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	1033	1059	1085	1105	1131	1152
Front centermm	609	635	661	681	707	728
Bottom bracket dropmm	31	31	31	31	31	31
Bottom bracket heightmm	305	305	305	305	305	305
Standover heightmm	695	738	774	802	836	872
Fork rakemm	52	39	39	40	39	39
Trailmm	70	83	83	82	83	83
Stack/reach ratio	1.57	1.41	1.41	1.38	1.36	1.36
Suspension and parts
Crank lengthmm	170	170	175	175	175	175
Handlebar widthmm	660	680	680	680	680	680
Stem lengthmm	60	75	75	90	90	105
Seatpost lengthmm	300	350	350	400	400	400

Not published by the manufacturer: 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

Tire width: 2″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

3 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: 2012
Sample: 238 bicycles with this information
Coverage: 75.3% of the class

Lowest gear

16.8 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2012
Sample: 294 bicycles with this information
Coverage: 93.0% 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: 2012
Sample: 294 bicycles with this information
Coverage: 93.0% 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: 2012
Lowest gear: 294 bicycles with this information, 93.0% of the class
Highest gear: 294 bicycles with this information, 93.0% 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 2012 builds
Specification	This bicycle Specialized Rockhopper	Specialized Rockhopper 29	Specialized Rockhopper Comp 29
Suspension
Front travel	100 mm	80 mm	80 mm
Drivetrain
Lowest gear	16.8 in	18.8 in	18.8 in
Highest gear	104.0 in	116.0 in	116.0 in
Other specifications
Wheel size	26″	29″	29″

Changes since 2011
Specification	2011 Specialized Rockhopper	This bicycle Specialized Rockhopper
Frame
Fork material	Steel	Aluminum
Suspension
Front travel	Not informed	100 mm
Drivetrain
Largest chainring	42	44
Rear sprockets	8	9
Largest sprocket	32	34
Lowest gear	17.9 in	16.8 in
Highest gear	99.3 in	104.0 in
Brakes
Brake type	Mechanical disc	Hydraulic disc