Lowest1.56:1
Highest4.17:1
Total range267%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 700C×23; rear size isn’t listed.
Velopedia Bicycle Archive
2011 GT GTR SRS 4
Original specifications: Shimano Sora · 8-speed rear derailleur · 700c wheels.
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At a glance
Archive #25065- Model year
- 2011
- Category
- Road
- Sizes
- XS, S, M, L, XL
- Colors
- Lime/black, White/Red
- In this record
- 26 specifications · 2 archived images
Original build6061 aluminum · Road Mix · 700c wheels
Frameset
| Frame Construction | Aluminum |
|---|---|
| Frame Material | 6061 aluminum |
| Fork | GT carbon |
| Fork Material | Carbon |
Drivetrain
| Component Group | Road Mix |
|---|---|
| Shifters | Shimano STI |
| Front Derailleur | Shimano Compact |
| Rear Derailleur | Shimano Sora |
| Crankset | FSA Tempo Compact, 50/39t teeth |
| Bottom Bracket | Sealed cartridge |
| Cassette | Shimano HG-50 |
| Rear Cogs | 8-speed, 12 - 25 teeth |
| Chain | Shimano |
Brakes
| Brakes | Dual pivot brakes, Shimano STI levers |
|---|
Cockpit & Contact Points
| Headset | Integrated |
|---|---|
| Handlebar | GT 6061 alloy |
| Handlebar Extensions | Not included |
| Stem | GT design 3D forged |
| Saddle | GT Road |
| Seatpost | Alloy |
Wheels & Tires
| Hubs | Formula sealed |
|---|---|
| Rims | Alex DRX-300 Aero Cross Section |
| Spokes | Stainless, 15ga. (1.8mm) |
| Spoke Nipples | Brass |
| Front Tire | 700 x 23c Vittoria Zaffiro |
| 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
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 23c Vittoria Zaffiro
Retailer offers
Vittoria Rubino Pro G2.0 Clincher Tire Black, 700x23
700x23c
Replacement option
Vittoria Zaffiro on eBaySponsored links
Shimano
Replacement search: 8-speed bicycle chain Before ordering: Check chain width and length.
FSA Tempo Compact
50/39t teeth
More parts (2)Fewer parts
Shimano Sora
Alex DRX-300 Aero Cross Section
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 23c Vittoria Zaffiro
- Drivetrain
- 8-speed
- Bottom bracket / shell
- Sealed cartridge
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: Aluminum · Fork: GT carbon · Carbon
Drivetrain
Check drivetrain wear →Archived: Group: Road Mix · Shifters: Shimano STI · Front derailleur: Shimano Compact · Rear derailleur: Shimano Sora · Crankset: FSA Tempo Compact, 50/39t teeth · Bottom bracket: Sealed cartridge · Cassette: Shimano HG-50 · Rear cogs: 8-speed, 12 - 25 teeth · Chain: Shimano
Brakes
Inspect the brakes →Archived: Brakes: Dual pivot brakes, Shimano STI levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Alex DRX-300 Aero Cross Section · Hubs: Formula sealed · Front tire: 700 x 23c Vittoria Zaffiro
Controls and contact points
Archived: Headset: Integrated · Handlebar: GT 6061 alloy · Stem: GT design 3D forged · Seatpost: Alloy · Saddle: GT Road
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Gallery2 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.