Ratio2.75:1
Estimated speed At 90 RPM
Gear
Uses front tire 20×2.125; rear size isn’t listed.
Velopedia Bicycle Archive
No archive photo is available for this record.
At a glance
Archive #38639- Model year
- 2003
- Category
- BMX
- Original MSRP
- $399.99
- Sizes
- One
- Colors
- Avus Blue
- In this record
- 22 specifications · original MSRP
Model history 7 other years
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Compare side by side
Identification clues
2003 archived details
- Published colors
- Avus Blue
- Frame
- 6061 T6 aluminum
- Original equipment
- N/A
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build6061 T6 aluminum · 20" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 6061 T6 aluminum |
| Fork | GT |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Crankset | GT 3-piece chromoly, 44 teeth |
|---|---|
| Bottom Bracket | Sealed cartridge |
| BB Shell Width | American |
| Rear Cogs | 1-speed, 16 teeth |
| Chain | KMC Z610HX, 1/2 X 3/16" |
| Pedals | GT BMX Design Aluminum |
Brakes
| Brakes | Tektro 920AL rear brakes, Tektro 313A rear levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Tange-Seiki TGMX |
|---|---|
| Handlebar | GT BMX |
| Stem | GT Piston |
| Saddle | GT Dropnose |
| Seatpost | Aluminum micro-adjust, 27.0mm diameter |
Wheels & Tires
| Hubs | GT Rhythm System II |
|---|---|
| Rims | Alex DX-2418 |
| Spokes | Steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 20 x 2.125" GT Brody Knobs |
| Wheel Size | 20" 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
20 x 2.125" GT Brody Knobs
Replacement search: 20x2.125 bicycle tire Before ordering: Check rim type and tire clearance.
Aluminum micro-adjust
27.0mm diameter
Alex DX-2418
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
- 20 x 2.125" GT Brody Knobs
- Drivetrain
- 1-speed
- Seatpost diameter
- 27 mm
- Bottom bracket / shell
- Sealed cartridge · American
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: GT · Chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Crankset: GT 3-piece chromoly, 44 teeth · Bottom bracket: Sealed cartridge · Rear cogs: 1-speed, 16 teeth · Chain: KMC Z610HX, 1/2 x 3/16"
Brakes
Inspect the brakes →Archived: Brakes: Tektro 920AL rear brakes, Tektro 313A rear levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Alex DX-2418 · Hubs: GT Rhythm System II · Front tire: 20 x 2.125" GT Brody Knobs
Controls and contact points
Archived: Headset: 1 1/8" threadless Tange-Seiki TGMX · Handlebar: GT BMX · Stem: GT Piston · Seatpost: Aluminum micro-adjust, 27.0mm diameter · Saddle: GT Dropnose · Pedals: GT BMX Design Aluminum
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.