Lowest1.20:1
Highest4.33:1
Total range361%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 700C×25; rear size isn’t listed.
Velopedia Bicycle Archive
2003 Giant OCR 1
Original specifications: Shimano 105 Triple drivetrain · 700c wheels · legacy reference geometry.
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At a glance
Archive #38819- Model year
- 2003
- Category
- Road
- Original MSRP
- $1,100.00
- Sizes
- S, M, L, XL
- Colors
- Black/Pearl Silver
- Geometry
- Legacy reference
- In this record
- 27 specifications · archived image · original MSRP · geometry
Model history 7 other years
Browse other years
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Identification clues
2003 archived details
- Published colors
- Black/Pearl Silver
- Frame
- Aluxx SL aluminum
- Original equipment
- Shimano 105 Triple
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildAluxx SL aluminum · Shimano 105 Triple · 700c wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Aluxx SL aluminum |
| Fork | Giant Composite Aero |
| Fork Material | Carbon fiber composite w/aluminum steerer, aero crown |
Drivetrain
| Component Group | Shimano 105 Triple |
|---|---|
| Shifters | Shimano 105 STI Dual Control |
| Front Derailleur | Shimano 105, braze-on |
| Rear Derailleur | Shimano 105 GS |
| Crankset | Shimano 105 Triple, 30/42/52 teeth |
| Bottom Bracket | Shimano BB-5500 |
| BB Shell Width | 68mm English |
| Rear Cogs | 9-speed, 12 - 25 teeth |
| Chain | 1/2 x 3/32" |
| Pedals | Shimano PD-M505 SPD |
Brakes
| Brakes | Shimano 105 Dual Pivot brakes, Shimano 105 STI Dual Control levers |
|---|
Cockpit & Contact Points
| Headset | 1" Aheadset |
|---|---|
| Handlebar | Anatomic drop bar |
| Handlebar Extensions | Not included |
| Stem | Giant Adjustable alloy |
| Saddle | Giant OCR |
| Seatpost | Aluminum micro-adjust, 27.2mm diameter |
Wheels & Tires
| Hubs | Shimano 105 |
|---|---|
| Rims | Mavic CXP 22, 32-hole |
| Spokes | Stainless steel |
| Spoke Nipples | Brass nipples |
| Front Tire | 700 x 25c Michelin Dynamic |
| Wheel Size | 700c wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Size
Measurement
Measurement
—
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 5 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 556.3 mm |
| Head-tube angle | 73° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 406.4 mm |
| Wheelbase | 985.5 mm |
Frame size not recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
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.
Try your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
700 x 25c Michelin Dynamic
Retailer offers
Vittoria Zaffiro Pro V Clincher Tire Black, 700x25
700x25c
Replacement option
Michelin Dynamic on eBaySponsored links
Aluminum micro-adjust
27.2mm diameter
Retailer offers
Race Face Ride XC Seatpost Black, 27.2x375mm
Replacement option
Shimano BB-5500
More parts (5)Fewer parts
Shimano PD-M505 SPD
Shimano 105
braze-on
Shimano 105 GS
Shimano 105 STI Dual Control
Mavic CXP 22
32-hole
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 700 x 25c Michelin Dynamic
- Drivetrain
- 9-speed
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- Shimano BB-5500 · 68mm English
Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.
Full used-bike inspection guide →
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Giant Composite Aero · Carbon fiber composite w/aluminum steerer, aero crown
Drivetrain
Check drivetrain wear →Archived: Group: Shimano 105 Triple · Shifters: Shimano 105 STI Dual Control · Front derailleur: Shimano 105, braze-on · Rear derailleur: Shimano 105 GS · Crankset: Shimano 105 Triple, 30/42/52 teeth · Bottom bracket: Shimano BB-5500 · Rear cogs: 9-speed, 12 - 25 teeth · Chain: 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano 105 Dual Pivot brakes, Shimano 105 STI Dual Control levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Mavic CXP 22, 32-hole · Hubs: Shimano 105 · Front tire: 700 x 25c Michelin Dynamic
Controls and contact points
Archived: Headset: 1" Aheadset · Handlebar: Anatomic drop bar · Stem: Giant Adjustable alloy · Seatpost: Aluminum micro-adjust, 27.2mm diameter · Saddle: Giant OCR · Pedals: Shimano PD-M505 SPD
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.