
Velopedia Bicycle Archive
2004 Specialized Hemi Expert
Original specifications: N/A drivetrain · 20" wheels · legacy reference geometry.
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At a glance
- Model year
- 2004
- Category
- BMX
- Sizes
- Expert
- Colors
- White
- Geometry
- Legacy reference
- In this record
- 23 specifications · archived image · geometry
- Archive ID
- 92335
Model history 1 other year
Frameset
| Frame Construction | Monocoque |
|---|---|
| Frame Material | Specialized A1 aluminum monocoque |
| Fork | Specialized |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Crankset | TruVativ Racing XR, 44 teeth |
|---|---|
| Bottom Bracket | TruVativ ISIS Drive Hussefelt |
| BB Shell Width | American |
| Rear Cogs | 1-speed, 16 teeth |
| Chain | KMC Z610HX, 1/2 X 3/32" |
| Pedals | Specialized aluminum platform |
Brakes
| Brakes | Tektro mini linear pull rear brakes, Tektro 317A short reach rear levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Aheadset SX-1 |
|---|---|
| Handlebar | Specialized 2 piece |
| Handlebar Extensions | Not included |
| Stem | Specialized aluminum |
| Saddle | Specialized Racing |
| Seatpost | Specialized aluminum, 22.2mm (7/8 inch) diameter |
Wheels & Tires
| Hubs | Front: Specialized aluminum, Rear: Specialized Flip Side |
|---|---|
| Rims | Sun Rims, 36-hole |
| Spokes | UCP, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 20 x 1 3/8" Specialized AA-Main |
| Wheel Size | 20" wheels |
Historical reference geometry
Geometry
This historical geometry describes the model, but the original source does not identify its frame size. Use it as a period reference, not a size-specific fit comparison.
| Measurement | Legacy reference |
|---|---|
| Top tube | 520.7 mm |
| Head-tube angle | 74° |
| Seat-tube angle | 71° |
| Chainstay / rear center | 363.2 mm |
The preserved source contains one model-level geometry set without an identified frame size.
Parts & serviceability
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Bike-specific inspection checklist 19 checks based on 5 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: 2004 Specialized Hemi Expert · BMX · Published sizes: Expert
Frame and fork
Inspect the frame and fork →Archived: Frame: Monocoque · Fork: Specialized · Chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Crankset: TruVativ Racing XR, 44 teeth · Bottom bracket: TruVativ ISIS Drive Hussefelt · Rear cogs: 1-speed, 16 teeth · Chain: KMC Z610HX, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro mini linear pull rear brakes, Tektro 317A short reach rear levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Sun Rims, 36-hole · Hubs: Front: Specialized aluminum, Rear: Specialized Flip Side · Front tire: 20 x 1 3/8" Specialized AA-Main
Controls and contact points
Archived: Headset: 1 1/8" threadless Aheadset SX-1 · Handlebar: Specialized 2 piece · Stem: Specialized aluminum · Seatpost: Specialized aluminum, 22.2mm (7/8 inch) diameter · Saddle: Specialized Racing · Pedals: Specialized aluminum platform
Before and during the test ride
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Current market
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




