Lowest1.20:1
Highest4.33:1
Total range361%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 700C×23; rear size isn’t listed.
Velopedia Bicycle Archive
1999 GT ZR-4000
Original specifications: Shimano RSX Triple drivetrain · 700c wheels · legacy reference geometry.
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No archive photo is available for this record.
At a glance
Archive #88404- Model year
- 1999
- Category
- Road
- Original MSRP
- $869.83
- Sizes
- 48cm, 50cm, 52cm, 56cm, 58cm, 60cm
- Colors
- Solar Mint
- Geometry
- Legacy reference
- In this record
- 25 specifications · original MSRP · geometry
Model history 1 other year
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Identification clues
1999 archived details
- Published colors
- Solar Mint
- Frame
- 7000 aluminum, butted
- Original equipment
- Shimano RSX Triple
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build7000 aluminum, butted · Shimano RSX Triple · 700c wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 7000 aluminum, butted |
| Fork | Kinesis |
| Fork Material | Aluminum, unicrown crown |
Drivetrain
| Component Group | Shimano RSX Triple |
|---|---|
| Shifters | Shimano RSX STI Dual Control |
| Front Derailleur | Shimano RSX |
| Rear Derailleur | Shimano RSX |
| Crankset | Shimano RX-100, 30/42/52 teeth |
| Bottom Bracket | Shimano cartridge |
| Rear Cogs | 8-speed, 12 - 25 teeth |
| Chain | Shimano CN-HG50, 1/2 x 3/32" |
| Pedals | Shimano PD-M515 SPD |
Brakes
| Brakes | Shimano RSX Dual Pivot brakes, Shimano RSX STI levers |
|---|
Cockpit & Contact Points
| Headset | 1" Tange-Seiki Passage |
|---|---|
| Handlebar | Modolo |
| Stem | Aluminum |
| Saddle | GT, chromoly rails |
| Seatpost | Aluminum micro-adjust |
Wheels & Tires
| Hubs | Shimano RSX |
|---|---|
| Rims | Mavic CXP 11, 32-hole |
| Spokes | DT stainless steel, 1.8mm straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 700 x 23c Michelin Axial Sport |
| 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 | 565 mm |
| Head-tube angle | 73.5° |
| Seat-tube angle | 73° |
| Chainstay / rear center | 410 mm |
| Wheelbase | 990 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
Shimano CN-HG50
1/2 x 3/32"
Retailer offers
SRAM PC-830 Chain One Color, 8 Speed
Replacement option
Shimano CN-HG50 on eBaySponsored links
700 x 23c Michelin Axial Sport
Retailer offers
Vittoria Rubino Pro G2.0 Clincher Tire Black, 700x23
700x23c
Replacement option
Michelin Axial Sport on eBaySponsored links
Shimano PD-M515 SPD
More parts (2)Fewer parts
Mavic CXP 11
32-hole
Shimano RSX
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 Michelin Axial Sport
- Drivetrain
- 8-speed
- Bottom bracket / shell
- Shimano 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: TIG-welded · Fork: Kinesis · Aluminum, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Group: Shimano RSX Triple · Shifters: Shimano RSX STI Dual Control · Front derailleur: Shimano RSX · Rear derailleur: Shimano RSX · Crankset: Shimano RX-100, 30/42/52 teeth · Bottom bracket: Shimano cartridge · Rear cogs: 8-speed, 12 - 25 teeth · Chain: Shimano CN-HG50, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Shimano RSX Dual Pivot brakes, Shimano RSX STI levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Mavic CXP 11, 32-hole · Hubs: Shimano RSX · Front tire: 700 x 23c Michelin Axial Sport
Controls and contact points
Archived: Headset: 1" Tange-Seiki Passage · Handlebar: Modolo · Stem: Aluminum · Seatpost: Aluminum micro-adjust · Saddle: GT, chromoly rails · Pedals: Shimano PD-M515 SPD
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.