
ENVE Twin Bolt Seatpost - Zero Offset UD Carbon, 30.9x400mm
30.9x400mm
Replacement option · verify fit
Velopedia Bicycle Archive
Original specifications: Mountain Mix drivetrain · 29" wheels.
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At a glance
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | M5 aluminum |
| Fork | RockShox Reba RLT 29, 100mm travel |
| Fork Material | Alloy Steerer, single crown |
| Component Group | Mountain Mix |
|---|---|
| Shifters | SRAM X.7 |
| Front Derailleur | E Thirteen XCX chain guide, E-type |
| Rear Derailleur | SRAM X.0 |
| Crankset | SRAM S-1250 |
| Bottom Bracket | SRAM GXP |
| Cassette | Shimano HG81 |
| Rear Cogs | 10-speed, 11 - 36 teeth |
| Chain | KMC X10 |
| Pedals | Resin Test Ride Pedals |
| Brakes | Avid Elixir R SL brakes, Avid Elixir R SL levers |
|---|
| Headset | 1 1/8" threadless Campy spec integrated sealed cartridge bearing |
|---|---|
| Handlebar | Specialized XC flat 31.8mm |
| Handlebar Extensions | Not included |
| Stem | Specialized XC |
| Saddle | Specialized BG Phenom Comp |
| Seatpost | Alloy single bolt setback, 30.9mm diameter |
| Hubs | Specialized Hi Lo disc |
|---|---|
| Rims | DT Swiss 520SL, 32-hole |
| Front Tire | Front: 29 x 2.2" S-Works Purgatory, Rear: 29 x 2.0" S-Works The Captain |
| Wheel Size | 29" wheels |
Parts & serviceability

30.9x400mm
Replacement option · verify fit
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.
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.
Archived: 2011 Specialized Stumpjumper 29er EVO · Mountain bike, front suspension · Published sizes: 15.5", 17.5", 19", 21", 23"
Archived: Frame: TIG-welded · Fork: RockShox Reba RLT 29, 100mm travel · Alloy Steerer, single crown
Archived: Fork: RockShox Reba RLT 29, 100mm travel
Archived: Group: Mountain Mix · Shifters: SRAM X.7 · Front derailleur: E Thirteen XCX chain guide, E-type · Rear derailleur: SRAM X.0 · Crankset: SRAM S-1250 · Bottom bracket: SRAM GXP · Cassette: Shimano HG81 · Rear cogs: 10-speed, 11 - 36 teeth · Chain: KMC X10
Archived: Brakes: Avid Elixir R SL brakes, Avid Elixir R SL levers
Archived: Wheel size: 29" wheels · Rims: DT Swiss 520SL, 32-hole · Hubs: Specialized Hi Lo disc · Front tire: Front: 29 x 2.2" S-Works Purgatory, Rear: 29 x 2.0" S-Works The Captain
Archived: Headset: 1 1/8" threadless Campy spec integrated sealed cartridge bearing · Handlebar: Specialized XC flat 31.8mm · Stem: Specialized XC · Seatpost: Alloy single bolt setback, 30.9mm diameter · Saddle: Specialized BG Phenom Comp · Pedals: Resin Test Ride Pedals
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.