Ratio2.28:1
Estimated speed At 90 RPM
Gear
Uses front tire 24×1.75; rear size isn’t listed.
Velopedia Bicycle Archive
At a glance
Archive #31453- Model year
- 2004
- Category
- BMX
- Original MSRP
- $399.90
- Sizes
- Pro XL
- Colors
- Blue
- In this record
- 22 specifications · archived image · original MSRP
Model history 5 other years
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Identification clues
2004 archived details
- Published colors
- 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 · 24" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 6061 T6 aluminum |
| Fork | GT |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Crankset | TruVativ Racing XR, 41 teeth |
|---|---|
| Bottom Bracket | TruVativ GIGA pipe DH |
| BB Shell Width | 68mm English |
| Rear Cogs | 1-speed, 18 teeth |
| Chain | KMC Z610HX, 1/2 X 1/8" |
| Pedals | GT BMX Design Aluminum |
Brakes
| Brakes | Tektro 930AL rear brakes, Tektro 313A rear levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Semi integrated threadless |
|---|---|
| Handlebar | GT BMX |
| Stem | GT Piston |
| Saddle | GT Pro Lite |
| Seatpost | Aluminum micro-adjust, 27.0mm diameter |
Wheels & Tires
| Hubs | GT Rhythm System II |
|---|---|
| Rims | Alex DM-24, 36-hole |
| Spokes | Steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 24 x 1.75" IRC Siren |
| Wheel Size | 24" 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
24 x 1.75" IRC Siren
Aluminum micro-adjust
27.0mm diameter
Alex DM-24
36-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.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 24 x 1.75" IRC Siren
- Drivetrain
- 1-speed
- Seatpost diameter
- 27 mm
- Bottom bracket / shell
- TruVativ GIGA pipe DH · 68mm English
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: TruVativ Racing XR, 41 teeth · Bottom bracket: TruVativ GIGA pipe DH · Rear cogs: 1-speed, 18 teeth · Chain: KMC Z610HX, 1/2 x 1/8"
Brakes
Inspect the brakes →Archived: Brakes: Tektro 930AL rear brakes, Tektro 313A rear levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 24" wheels · Rims: Alex DM-24, 36-hole · Hubs: GT Rhythm System II · Front tire: 24 x 1.75" IRC Siren
Controls and contact points
Archived: Headset: 1 1/8" threadless Semi integrated threadless · Handlebar: GT BMX · Stem: GT Piston · Seatpost: Aluminum micro-adjust, 27.0mm diameter · Saddle: GT Pro Lite · 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.