Rear tire: 29×2.6.
Velopedia Bicycle Archive
2018 Specialized Stumpjumper Expert 29
Original specifications: geometry for 4 published sizes.
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At a glance
- Model year
- 2018
- Category
- Mountain
- Original MSRP
- $5,000.00
- Sizes
- S, M, L, XL
- Colors
- Gloss/Storm Grey/Rocket Red, Satin/Rocket Red/Black
- Geometry
- 4 manufacturer sizes
- In this record
- 21 specifications · 2 archived images · original MSRP · geometry
- Archive ID
- 900003383
Original buildCarbon Fiber
Frameset
| Frame Construction | FACT 11m, full carbon chassis and rear end, asymmetrical design, 29 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 140mm of travel |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | RockShox Pike RC, DebonAir, rebound/low-speed compression adjust, tapered steerer, 51mm offset, 15mm Maxle® Stealth thru-axle, 15x110mm Boost™, 150mm of travel |
| Rear Shock | RockShox Deluxe RT3, Rx Trail Tune, rebound and 3-position compression adjust, 210x50mm |
Drivetrain
| Shifters | SRAM GX Eagle, trigger, 12-speed |
|---|---|
| Rear Derailleur | SRAM GX Eagle, 12-speed |
| Crankset | Truvativ Descendant, aluminum, Boost™ 148, 170mm crankarm, 24mm spindle; chainrings: 30T |
| Bottom Bracket | SRAM GXP |
| Cassette | SRAM GX Eagle, 12-speed, 10-50t |
| Chain | SRAM GX Eagle, 12-speed w/ PowerLock® |
| Pedals | Specialized Dirt |
Brakes
| Brakes | (F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm rotor / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm rotor |
|---|
Cockpit & Contact Points
| Handlebar | Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp |
|---|---|
| Stem | Specialized Trail, forged alloy, 4-bolt, 5mm rise, 40mm |
| Saddle | Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm |
| Seatpost | Command Post IRcc, 16-position micro-height adjustable, two-bolt head, bottom mount cable routing, remote SRL lever, 34.9mm, S: 130mm, M/L/XL: 160mm of travel |
Wheels & Tires
| Hubs | (F) Specialized, sealed cartridge bearings, 15x110mm spacing, 28h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h |
|---|---|
| Rims | Roval Traverse Carbon 29, hookless carbon, 30mm inner width, 28h, tubeless ready, hand-built |
| Spokes | DT Swiss Industry |
| Front Tire | Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.6" |
| Rear Tire | Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 29 x2.6" |
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 | 572 mm | 595 mm | 628 mm | 662 mm |
| Head tube | 95 mm | 95 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 | 1149 mm | 1169 mm | 1201 mm | 1232 mm |
| Bottom-bracket drop | 33 mm | 33 mm | 33 mm | 33 mm |
| Bottom-bracket height | 342 mm | 342 mm | 342 mm | 342 mm |
| Reach | 405 mm | 425 mm | 445 mm | 470 mm |
| Stack | 614 mm | 614 mm | 641 mm | 656 mm |
| Standover height | 747 mm | 750 mm | 762 mm | 775 mm |
| Fork offset / rake | 51 mm | 51 mm | 51 mm | 51 mm |
| Front center | 714 mm | 734 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 | 369 mm | 429 mm | 429 mm | 429 mm |
| Crank length | 170 mm | 170 mm | 170 mm | 170 mm |
| Stem length | 40 mm | 40 mm | 50 mm | 50 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
126 links

SRAM XG-1275 GX Eagle 12-Speed Cassette Black, 10-50t
10-50t
More parts (6)
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
Bike-specific inspection checklist 23 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: 2018 Specialized Stumpjumper Expert 29 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: FACT 11m, full carbon chassis and rear end, asymmetrical design, 29 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 140mm of travel · Fork: RockShox Pike RC, DebonAir, rebound/low-speed compression adjust, tapered steerer, 51mm offset, 15mm Maxle® Stealth thru-axle, 15x110mm Boost™, 150mm of travel
Suspension
Evaluate the suspension →Archived: Fork: RockShox Pike RC, DebonAir, rebound/low-speed compression adjust, tapered steerer, 51mm offset, 15mm Maxle® Stealth thru-axle, 15x110mm Boost™, 150mm of travel · Rear shock: RockShox Deluxe RT3, Rx Trail Tune, rebound and 3-position compression adjust, 210x50mm
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM GX Eagle, trigger, 12-speed · Rear derailleur: SRAM GX Eagle, 12-speed · Crankset: Truvativ Descendant, aluminum, Boost™ 148, 170mm crankarm, 24mm spindle; chainrings: 30T · Bottom bracket: SRAM GXP · Cassette: SRAM GX Eagle, 12-speed, 10-50t · Chain: SRAM GX Eagle, 12-speed w/ PowerLock®
Brakes
Inspect the brakes →Archived: Brakes: (F) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm rotor / (R) SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm rotor
Wheels and tires
Check wheels and tires →Archived: Rims: Roval Traverse Carbon 29, hookless carbon, 30mm inner width, 28h, tubeless ready, hand-built · Hubs: (F) Specialized, sealed cartridge bearings, 15x110mm spacing, 28h / (R) Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h · Front tire: Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.6" · Rear tire: Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 29 x2.6"
Controls and contact points
Archived: Handlebar: Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp · Stem: Specialized Trail, forged alloy, 4-bolt, 5mm rise, 40mm · Seatpost: Command Post IRcc, 16-position micro-height adjustable, two-bolt head, bottom mount cable routing, remote SRL lever, 34.9mm, S: 130mm, M/L/XL: 160mm of travel · Saddle: Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm · Pedals: Specialized Dirt
Before and during the test ride
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Gallery2 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





