Velopedia Bicycle Archive
2002 Specialized Sirrus A1
Original specifications: Hybrid Mix drivetrain · 700c wheels · legacy reference geometry.
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At a glance
- Model year
- 2002
- Category
- Hybrid
- Original MSRP
- $550.00
- Sizes
- 50cm, 54cm, 56cm, 58cm, 60cm
- Colors
- Silver
- Geometry
- Legacy reference
- In this record
- 27 specifications · archived image · original MSRP · geometry
- Archive ID
- 37063
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Specialized A1 aluminum |
| Fork | Specialized |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Component Group | Hybrid Mix |
|---|---|
| Shifters | Shimano ST-EF33 EZ Fire STI |
| Front Derailleur | Shimano FC-T301, bottom-pull/clamp-on 31.8mm |
| Rear Derailleur | Shimano Acera |
| Crankset | Specialized Sirrus, 28/38/48 teeth |
| Bottom Bracket | Tange Seiki Sport, 113mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 8-speed, 11 - 30 teeth |
| Chain | Shimano CN-HG50, 1/2 x 3/32" |
| Pedals | Specialized aluminum platform |
Brakes
| Brakes | ProMax SX-V85 linear-pull brakes, Shimano ST-EF33 EZ Fire STI levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Ritchey Logic |
|---|---|
| Handlebar | Specialized aluminum |
| Handlebar Extensions | Not included |
| Stem | Specialized aluminum |
| Saddle | Specialized Body Geometry Sport |
| Seatpost | Kalloy SP-245 suspension, 27.2mm diameter |
Wheels & Tires
| Hubs | Aluminum, Q/R |
|---|---|
| Rims | Alex aluminum, 32-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 700 x 28c Specialized Nimbus EX |
| Wheel Size | 700c 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Historical reference geometry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 | 557 mm |
| Head-tube angle | 72.5° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 418 mm |
| Wheelbase | 1014 mm |
| Fork offset / rake | 46 mm |
The preserved source contains one model-level geometry set without an identified frame size.
Published drivetrain ratios
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
The bar uses the same mechanical-ratio calculation as Compare. Wheel-dependent speed appears only when the record includes an exact ISO/ETRTO rear tire size; no tire size is assumed.
Parts & serviceability
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More qualified parts (6)
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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: 2002 Specialized Sirrus A1 · Hybrid · Published sizes: 50cm, 54cm, 56cm, 58cm, 60cm
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Specialized · Chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Group: Hybrid Mix · Shifters: Shimano ST-EF33 EZ Fire STI · Front derailleur: Shimano FC-T301, bottom-pull/clamp-on 31.8mm · Rear derailleur: Shimano Acera · Crankset: Specialized Sirrus, 28/38/48 teeth · Bottom bracket: Tange Seiki Sport, 113mm spindle · Rear cogs: 8-speed, 11 - 30 teeth · Chain: Shimano CN-HG50, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: ProMax SX-V85 linear-pull brakes, Shimano ST-EF33 EZ Fire STI levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Alex aluminum, 32-hole · Hubs: Aluminum, Q/R · Front tire: 700 x 28c Specialized Nimbus EX
Controls and contact points
Archived: Headset: 1 1/8" threadless Ritchey Logic · Handlebar: Specialized aluminum · Stem: Specialized aluminum · Seatpost: Kalloy SP-245 suspension, 27.2mm diameter · Saddle: Specialized Body Geometry Sport · 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.





