Rear tire: 29×2.3.
Velopedia Bicycle Archive
2020 Specialized Stumpjumper 29
Original specifications: geometry for 4 published sizes.
Selling this bike? Get the spec link and selling options
At a glance
- Model year
- 2020
- Category
- Mountain
- Original MSRP
- $2,720.00
- Sizes
- S, M, L, XL
- Colors
- Gloss Black / Dove Grey, Satin Aqua / Rocket Red / Black
- Geometry
- 4 manufacturer sizes
- In this record
- 21 specifications · 6 archived images · original MSRP · geometry
- Archive ID
- 900003531
Original buildAluminum
Frameset
| Frame Construction | 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, 140mm of travel |
|---|---|
| Frame Material | Aluminum |
| Fork | RockShox 35 Gold RL, DebonAir, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 150mm of travel |
| Rear Shock | RockShox Deluxe Select, Rx Trail Tune, rebound adjust, 210x50mm |
Drivetrain
| Shifters | SRAM SX Eagle, trigger, 12-speed |
|---|---|
| Rear Derailleur | SRAM SX Eagle, 12-speed |
| Crankset | SRAM SX Eagle, Powerspline, 170mm; chainrings: Steel, 30T |
| Bottom Bracket | SRAM Powerspline |
| Cassette | SRAM PG-1210 Eagle, 11-50t |
| Chain | SRAM SX Eagle, 12-speed |
| Pedals | Test Ride Pedals Provided by Specialized |
Brakes
| Brakes | (F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm |
|---|
Cockpit & Contact Points
| Handlebar | Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, S 720mm, M-XL 750mm |
|---|---|
| Stem | Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise |
| Saddle | Body Geometry Myth 155 S, Body Geometry Henge 143 M/L/XL, steel rails |
| Seatpost | X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, S: 125mm, M/L: 150mm, XL: 170mm |
Wheels & Tires
| Hubs | (F) Specialized, sealed cartridge bearings, 15x110mm thru-axle, 28h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h |
|---|---|
| Rims | 700C disc, double-wall alloy, pinned, 32h |
| Spokes | Stainless, 14g |
| Front Tire | Butcher, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.6" |
| Rear Tire | Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3" |
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 20 measurements
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 380 mm | 410 mm | 455 mm | 505 mm |
| Effective top tube | 573 mm | 597 mm | 628 mm | 662 mm |
| Head tube | 100 mm | 100 mm | 125 mm | 140 mm |
| Head-tube angle | 66.5° | 66.5° | 66.5° | 66.5° |
| Seat-tube angle | 74.8° | 74.5° | 74.1° | 73.7° |
| Chainstay / rear center | 437 mm | 437 mm | 437 mm | 437 mm |
| Wheelbase | 1151 mm | 1171 mm | 1201 mm | 1232 mm |
| Bottom-bracket drop | 33 mm | 33 mm | 33 mm | 33 mm |
| Bottom-bracket height | 341 mm | 341 mm | 341 mm | 341 mm |
| Reach | 405 mm | 425 mm | 445 mm | 470 mm |
| Stack | 619 mm | 619 mm | 642 mm | 656 mm |
| Standover height | 756 mm | 762 mm | 775 mm | 776 mm |
| Fork offset / rake | 51 mm | 51 mm | 51 mm | 51 mm |
| Front center | 716 mm | 736 mm | 766 mm | 797 mm |
| Trail | 107 mm | 107 mm | 107 mm | 107 mm |
| Fork length / axle-to-crown | 560 mm | 560 mm | 560 mm | 560 mm |
| Seatpost length | 375 mm | 438 mm | 438 mm | 478 mm |
| Crank length | 170 mm | 170 mm | 170 mm | 170 mm |
| Stem length | 45 mm | 45 mm | 45 mm | 45 mm |
| Handlebar width | 780 mm | 780 mm | 780 mm | 780 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Parts & serviceability
Find replacement parts

SRAM GX Eagle 12-Speed Chain Silver, 126 links
Replacement option
More parts (6)Fewer parts

SRAM SX Eagle 12-Speed Rear Derailleur Black/Aluminum, One Size
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Bike-specific inspection checklist 22 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2020 Specialized Stumpjumper 29 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: 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, 140mm of travel · Fork: RockShox 35 Gold RL, DebonAir, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 150mm of travel
Suspension
Evaluate the suspension →Archived: Fork: RockShox 35 Gold RL, DebonAir, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 150mm of travel · Rear shock: RockShox Deluxe Select, Rx Trail Tune, rebound adjust, 210x50mm
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM SX Eagle, trigger, 12-speed · Rear derailleur: SRAM SX Eagle, 12-speed · Crankset: SRAM SX Eagle, Powerspline, 170mm; chainrings: Steel, 30T · Bottom bracket: SRAM Powerspline · Cassette: SRAM PG-1210 Eagle, 11-50t · Chain: SRAM SX Eagle, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm
Wheels and tires
Check wheels and tires →Archived: Rims: 700C disc, double-wall alloy, pinned, 32h · Hubs: (F) Specialized, sealed cartridge bearings, 15x110mm thru-axle, 28h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h · Front tire: Butcher, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.6" · Rear tire: Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
Controls and contact points
Archived: Handlebar: Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, S 720mm, M-XL 750mm · Stem: Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise · Seatpost: X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, S: 125mm, M/L: 150mm, XL: 170mm · Saddle: Body Geometry Myth 155 S, Body Geometry Henge 143 M/L/XL, steel rails · Pedals: TEST RIDE PEDALS PROVIDED BY SPECIALIZED
Before and during the test ride
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Gallery6 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




