Uses front tire 700C×25; rear size isn’t listed.
Velopedia Bicycle Archive
2006 Giant OCR 3 x05
Original specifications: Shimano Sora · 8-speed · mechanical rear derailleur · 700c wheels.
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At a glance
Archive #94327- Model year
- 2006
- Category
- Road
- Original MSRP
- $600.00
- Sizes
- XS, S, M, L, XL
- Colors
- Corsa Red, Cloud Blue
- In this record
- 27 specifications · archived image · original MSRP
Original buildALUXX aluminum · Road Mix Triple · 700c wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | ALUXX aluminum |
| Fork | FormulaOne |
| Fork Material | Carbon fiber/aluminum steerer, aero crown |
Drivetrain
| Component Group | Road Mix Triple |
|---|---|
| Shifters | Shimano Sora STI Dual Control |
| Front Derailleur | Shimano Sora, braze-on |
| Rear Derailleur | Shimano Sora GS |
| Crankset | Truvativ Touro, 30/42/52 teeth |
| Bottom Bracket | Truvativ BB7420, 113mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 8-speed, 12 - 26 teeth |
| Chain | KMC Z72, 1/2 x 3/32" |
| Pedals | Steel cage, resin body |
Brakes
| Brakes | Tektro dual pivot brakes, Shimano Sora STI Dual Control levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless integrated |
|---|---|
| Handlebar | Anatomic drop bar |
| Handlebar Extensions | Not included |
| Stem | Giant Adjustable alloy |
| Saddle | WTB Laser V Comp |
| Seatpost | Aluminum micro-adjust, 27.2mm diameter |
Wheels & Tires
| Hubs | Aluminum, Q/R |
|---|---|
| Rims | Alex DA-22, 32-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| 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.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
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
1/2 x 3/32"

SRAM PC-830 Chain One Color, 8 Speed
Replacement option

Vittoria Zaffiro Pro V Clincher Tire Black, 700x25
700x25c
Replacement option
27.2mm diameter

Race Face Ride XC Seatpost Black, 27.2x375mm
Replacement option
More parts (5)Fewer parts
braze-on
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.
Service essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 700 x 25c Michelin DynamicCheck: Verify the fitted tire’s size marking and rim type.
- Drivetrain
- 8-speedCheck: Match the installed drivetrain family, not just its speed count.
- Seatpost diameter
- 27.2 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- Truvativ BB7420, 113mm spindle · 68mm EnglishCheck: Verify shell type and width, crank interface, and spindle length or spacers.
Not confirmed in this record: Rear tire. Check the fitted parts for these details.
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: 2006 Giant OCR 3 x05 · Road/sport · Published sizes: XS, S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: FormulaOne · Carbon fiber/aluminum steerer, aero crown
Drivetrain
Check drivetrain wear →Archived: Group: Road Mix Triple · Shifters: Shimano Sora STI Dual Control · Front derailleur: Shimano Sora, braze-on · Rear derailleur: Shimano Sora GS · Crankset: Truvativ Touro, 30/42/52 teeth · Bottom bracket: Truvativ BB7420, 113mm spindle · Rear cogs: 8-speed, 12 - 26 teeth · Chain: KMC Z72, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro dual pivot brakes, Shimano Sora STI Dual Control levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Alex DA-22, 32-hole · Hubs: Aluminum, Q/R · Front tire: 700 x 25c Michelin Dynamic
Controls and contact points
Archived: Headset: 1 1/8" threadless integrated · Handlebar: Anatomic drop bar · Stem: Giant Adjustable alloy · Seatpost: Aluminum micro-adjust, 27.2mm diameter · Saddle: WTB Laser V Comp · Pedals: Steel cage, resin body
Before and during the test ride
Follow the full used-bike inspection order →Have you owned this model?Help document firsthand fit, ride and maintenance details that may no longer be available.
This archive record has limited published detail. Share what would help another rider understand how this model fit, rode and held up over time. Velopedia reviews every contribution before publication.
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




