Specialized Rockhopper 29

2015 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 3 × 8 22–42t / 11–34t
Gear range: 590%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

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 A1 Premium Aluminum, 29er geometry ORE downtube, butted tubesets, externally relieved headtube, forged dropouts, reinforced disc mount, replaceable alloy derailleur hanger Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket

Square taper, cartridge bearings Not identified
Cassette
- SunRace
Chain
- KMC X8 8 speeds
Crankset
- Specialized 42/32/22t
Front derailleur
- Shimano Altus
Rear derailleur
- Shimano Acera
Shifters
- Shimano Altus

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Specialized
Rear hub
- Specialized
Rims

29"" disc, alloy double-wall, pin joint, 25mm inner width, 36h Not identified
Spokes

Stainless, 14g, w/ brass nipple Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips
- Specialized
Handlebar
- Specialized
Headset

1-1/8"" upper/lower, Zerostack 44, steel cups, loose ball bearings Not identified
Pedals

Composite platform, w/ reflectors, 9/16"" Not identified
Saddle

Body Geometry mountain, steel rails, 143mm Not identified
Seatpost

Alloy, 2-bolt, micro-adjust, 12.5mm offset, 30.9mm, anti-corrosion hardware Not identified
Stem
- Specialized

Sizes and geometry

5 sizes Open in the geometry plotter

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

Size LG

Table

Reach 430mm

Stack 639mm

Wheelbase 1114mm

Head angle 71.0°

Seat angle 72.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	400	412	430	450	464
Stackmm	615	624	639	653	672
Top tube lengthmm	588	615	637	662	682
Seat tube lengthmm	395	445	460	510	560
Head tube lengthmm	110	100	115	130	150
Head tube angle	71°	71°	71°	71°	71°
Seat tube angle	73°	72°	72°	72°	72°
Chainstay lengthmm	442	442	442	442	442
Wheelbasemm	1076	1091	1114	1139	1159
Front centermm	642	657	680	704	725
Bottom bracket dropmm	63.5	63.5	63.5	63.5	63.5
Bottom bracket heightmm	308.5	308.5	308.5	308.5	308.5
Standover heightmm	757	808	824	856	888
Fork rakemm	46	46	46	46	45
Trailmm	79	79	79	79	79
Stack/reach ratio	1.54	1.52	1.49	1.45	1.45
Suspension and parts
Crank lengthmm	170	175	175	175	175
Handlebar widthmm	700	720	720	720	720
Stem lengthmm	60	70	70	80	90

Not published by the manufacturer: Front travel, Rear travel, Stem angle, Seatpost length 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: 42
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 18.8 in
Highest gear: 110.7 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: 2.1″
Wheel material: Aluminum
Wheel size: 29″

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: 2015
Sample: 365 bicycles with this information
Coverage: 82.5% of the class

Lowest gear

18.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2015
Sample: 410 bicycles with this information
Coverage: 92.7% of the class

Highest gear

110.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2015
Sample: 410 bicycles with this information
Coverage: 92.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 42.4 km/h

Total gear range 590%

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: 18.8–110.7 gear inches
Class reference (p10–p90): 16.8–110.7 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2015
Lowest gear: 410 bicycles with this information, 92.7% of the class
Highest gear: 410 bicycles with this information, 92.7% 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 2015 builds
Specification	This bicycle Specialized Rockhopper 29	Specialized Rockhopper Comp 29	Specialized Rockhopper Expert 29	Specialized Rockhopper Expert EVO 29	Specialized Rockhopper Expert EVO 650b	Specialized Rockhopper Pro EVO 29
Frame
Fork material	Aluminum	Steel	Aluminum	Aluminum	Aluminum	Aluminum
Suspension
Front travel	100 mm	100 mm	100 mm	120 mm	120 mm	120 mm
Drivetrain
Front chainrings	3	2	2	2	2	2
Largest chainring	42	36	36	36	36	36
Rear sprockets	8	9	10	10	10	10
Largest sprocket	34	36	36	36	36	36
Lowest gear	18.8 in	17.7 in	17.7 in	17.7 in	16.8 in	17.7 in
Highest gear	110.7 in	94.9 in	94.9 in	94.9 in	90.0 in	94.9 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost
Other specifications
Fork spring	Coil	Coil	Air	Air	Air	Air
Tire width	2.1″	2.1″	2.1″	2.3″	2.3″	2.3″
Wheel size	29″	29″	29″	29″	27.5″	29″
Bottom bracket standard	Not informed	Not informed	BSA	BSA	BSA	BSA