Specialized Stumpjumper ST Comp Alloy 29

Name: Specialized Stumpjumper ST Comp Alloy 29
Brand: Specialized

2020 MountainTrail Manufacturer page

Last known price: $3,020

Prices shown first for United States
Travel: 130 / 120 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 11 30t / 11–46t
Gear range: 418%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

15 of 20 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

M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

Threaded BB, 24mm spindle Not identified
Cassette
- Shimano SLX CS-M7000 11–46t
CS-M7000
Chain
- KMC X11 11 speeds
Crankset
- Race Face Ride 30t
Rear derailleur
- Shimano SLX
Shifters
- Shimano SLX SL-M7000
SL-M7000

Brakes

1 part

Brakes
- Shimano BL-MT501
BL-MT501MT-501

Wheels and tires

5 parts

Front hub
- Specialized
Rear hub
- Specialized
Rims

Double-wall alloy, 27mm internal width Not identified
Spokes

Stainless, 14g Not identified
Tires

Front: Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3", Rear: Purgatory, GRID Casing, GRIPTON® compound, 29x2.3" Not identified

Cockpit and contact points

5 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 435mm

Stack 612mm

Wheelbase 1163mm

Head angle 67.5°

Seat angle 75.5°

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	415	435	455	—
Stackmm	612	612	635	—
Top tube lengthmm	570	593	624	—
Seat tube lengthmm	380	410	455	—
Head tube lengthmm	100	100	125	—
Head tube angle	67.5°	67.5°	67.5°	—
Seat tube angle	75.8°	75.5°	75.1°	—
Chainstay lengthmm	437	437	437	—
Wheelbasemm	1143	1163	1192	—
Front centermm	708	728	758	—
Bottom bracket dropmm	39	39	39	—
Bottom bracket heightmm	333	333	333	—
Standover heightmm	750	756	769	—
Fork rakemm	51	51	51	—
Trailmm	99	99	99	—
Stack/reach ratio	1.48	1.41	1.40	—
Suspension and parts
Crank lengthmm	170	170	170	170
Handlebar widthmm	780	780	780	780
Stem lengthmm	45	45	45	45
Seatpost lengthmm	375	438	438	478

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: Full suspension
Front travel: 130 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 18.9 in
Highest gear: 79.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.3″
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

130 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,339 bicycles with this information
Coverage: 93.7% of the class

Lowest gear

18.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 85.2% of the class

Highest gear

79.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 85.2% of the class

Shifting

Mechanical

55 of 1,428 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,428 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 30.3 km/h

Total gear range 418%

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: 18.9–79.1 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2020
Lowest gear: 1217 bicycles with this information, 85.2% of the class
Highest gear: 1217 bicycles with this information, 85.2% 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 2020 builds
Specification	This bicycle Specialized Stumpjumper ST Comp Alloy 29	Specialized Men's Stumpjumper Comp Alloy 27.5 12-speed	Specialized Men's Stumpjumper Comp Alloy 29 12-speed	Specialized Men's Stumpjumper Comp Carbon 27.5 12-speed	Specialized Men's Stumpjumper Comp Carbon 29 12-speed	Specialized Men's Stumpjumper Pro 29
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Carbon
Fork material	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum	Not informed
Suspension
Front travel	130 mm	150 mm	150 mm	150 mm	150 mm	150 mm
Rear travel	120 mm	150 mm	140 mm	150 mm	140 mm	140 mm
Drivetrain
Smallest chainring	30	32	30	32	30	30
Largest chainring	30	32	30	32	30	30
Rear sprockets	11	12	12	12	12	12
Smallest sprocket	11	11	11	11	11	10
Largest sprocket	46	50	50	50	50	50
Lowest gear	18.9 in	17.6 in	17.4 in	18.6 in	17.4 in	17.4 in
Highest gear	79.1 in	80.0 in	79.1 in	84.4 in	79.1 in	87.0 in
Other specifications
Tire width	2.3″	2.6″	2.6″	2.6″	2.6″	2.6″
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum	Carbon
Wheel size	29″	27.5″	29″	29″	29″	29″