
ENVE Twin Bolt Seatpost - Zero Offset UD Carbon, 30.9x400mm
30.9x400mm
Replacement option · verify fit
Velopedia Bicycle Archive
Original specifications: N/A drivetrain · 20" wheels.
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At a glance
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | A1 Premium aluminum |
| Fork | Specialized |
| Fork Material | Chromoly, unicrown crown |
| Crankset | TruVativ Racing Team, 44 teeth |
|---|---|
| Bottom Bracket | TruVativ GigaPipe, 113mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 1-speed, 16 teeth |
| Chain | KMC Z610HX, 1/2 X 3/32" |
| Pedals | Specialized Magnesium |
| Brakes | Shimano BR-M420 rear brakes, Shimano Deore rear levers |
|---|
| Headset | 1 1/8" threadless Specialized |
|---|---|
| Handlebar | Chromoly 2-piece |
| Stem | Specialized Asym Race |
| Saddle | Hemi Super Light |
| Seatpost | Aluminum micro-adjust, 30.9mm diameter |
| Hubs | Front: Specialized, Rear: Specialized flip-flop |
|---|---|
| Rims | Sun Rims Rhyno Lite XL, 36-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | Front: 20 x 2.125" Specialized AA-Main Pro, Rear: 20 x 1.75" Specialized AA-Main Pro |
| Wheel Size | 20" 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: 2005 Specialized Hemi Pro · BMX
Archived: Frame: TIG-welded · Fork: Specialized · Chromoly, unicrown crown
Archived: Crankset: TruVativ Racing Team, 44 teeth · Bottom bracket: TruVativ GigaPipe, 113mm spindle · Rear cogs: 1-speed, 16 teeth · Chain: KMC Z610HX, 1/2 x 3/32"
Archived: Brakes: Shimano BR-M420 rear brakes, Shimano Deore rear levers
Archived: Wheel size: 20" wheels · Rims: Sun Rims Rhyno Lite XL, 36-hole · Hubs: Front: Specialized, Rear: Specialized flip-flop · Front tire: Front: 20 x 2.125" Specialized AA-Main Pro, Rear: 20 x 1.75" Specialized AA-Main Pro
Archived: Headset: 1 1/8" threadless Specialized · Handlebar: Chromoly 2-piece · Stem: Specialized Asym Race · Seatpost: Aluminum micro-adjust, 30.9mm diameter · Saddle: Hemi Super Light · Pedals: Specialized Magnesium
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.