Lowest1.00:1
Highest4.17:1
Total range417%
Velopedia Bicycle Archive
1993 GT Quatrefoil
Original specifications: Shimano Altus A10 Rapidfire Plus drivetrain · legacy reference geometry.
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No archive photo is available for this record.
At a glance
Archive #42154- Model year
- 1993
- Category
- Tandem
- Original MSRP
- $1,099.00
- Sizes
- 20/18, 19/17, 18/15
- Geometry
- Legacy reference
- In this record
- 19 specifications · original MSRP · geometry
Original buildTange MTB DB chrome-moly · Shimano Altus A10 Rapidfire Plus
Frameset
| Frame Construction | TIG-welded steel |
|---|---|
| Frame Material | Tange MTB DB chrome-moly |
| Fork | GT unicrown full chrome-moly |
Drivetrain
| Component Group | Shimano Altus A10 Rapidfire Plus |
|---|---|
| Shifters | Shimano Altus A10 Rapidfire Plus |
| Front Derailleur | Shimano Altus A10 |
| Rear Derailleur | Shimano Altus A10 |
| Crankset | Sugino GP tandem, 28/40/50 teeth |
| Rear Cogs | 7-speed, 12 - 28 teeth |
| Chain | DID Super Lanner |
| Pedals | ATB with Steel Cage |
Brakes
| Brakes | Shimano Altus A20 brakes, levers |
|---|
Cockpit & Contact Points
| Handlebar | GT Ergo with Multi-Hand Positions |
|---|---|
| Stem | GT Chromoly ATB |
| Saddle | GT Gel Lite |
| Seatpost | GT Alloy Micro-Adjust |
Wheels & Tires
| Hubs | Shimano Exage |
|---|---|
| Rims | Araya TM-18, 36-hole |
| Front Tire | Cheng Shin Dual Purpose |
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 | 579.1 mm |
| Head-tube angle | 72.5° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 434.3 mm |
| Fork offset / rake | 45.7 mm |
Frame size not recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Speed unavailable: wheel or tire size is missing or unclear.
Add your rear tire size to calculate speedHow 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
Shimano Altus A10
Shimano Altus A10
Shimano Altus A10 Rapidfire Plus
More parts (1)Fewer parts
Shimano Exage
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Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Cheng Shin Dual Purpose
- Drivetrain
- 7-speed
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 steel · Fork: GT unicrown full chrome-moly
Drivetrain
Check drivetrain wear →Archived: Group: Shimano Altus A10 Rapidfire Plus · Shifters: Shimano Altus A10 Rapidfire Plus · Front derailleur: Shimano Altus A10 · Rear derailleur: Shimano Altus A10 · Crankset: Sugino GP tandem, 28/40/50 teeth · Rear cogs: 7-speed, 12 - 28 teeth · Chain: DID Super Lanner
Brakes
Inspect the brakes →Archived: Brakes: Shimano Altus A20 brakes, levers
Wheels and tires
Check wheels and tires →Archived: Rims: Araya TM-18, 36-hole · Hubs: Shimano Exage · Front tire: Cheng Shin Dual Purpose
Controls and contact points
Archived: Handlebar: GT Ergo with Multi-Hand Positions · Stem: GT Chromoly ATB · Seatpost: GT Alloy Micro-Adjust · Saddle: GT Gel Lite · Pedals: ATB with Steel Cage
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.