Ratio2.75:1
Estimated speed At 90 RPM
Gear
Rear tire: 20×1.95.
Velopedia Bicycle Archive
2001 Diamondback Assault T1
Original specifications: 20" wheels · legacy reference geometry.
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At a glance
Archive #36059- Model year
- 2001
- Category
- BMX
- Original MSRP
- $249.99
- Sizes
- Pro
- Colors
- Piston Blue, Scorch Red
- Geometry
- Legacy reference
- In this record
- 21 specifications · archived image · original MSRP · geometry
Model history 1 other year
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Identification clues
2001 archived details
- Published colors
- Piston Blue, Scorch Red
- Frame
- Chromoly
- Original equipment
- N/A
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildChromoly · 20" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Chromoly |
| Fork | Diamondback RMX |
| Fork Material | Chromoly, unicrown crown |
Drivetrain
| Crankset | 1-piece 180mm, 44 teeth |
|---|---|
| Bottom Bracket | Steel retainer style |
| Rear Cogs | 1-speed, 16 teeth |
| Chain | KMC Z410, 1/2 x 3/32" |
| Pedals | Aluminum platform |
Brakes
| Brakes | ProMax 295l rear brakes, ProMax 63l rear levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Tange Seiki TG-3 |
|---|---|
| Handlebar | Chromoly BMX |
| Handlebar Extensions | Not included |
| Stem | Aluminum |
| Saddle | Padded BMX |
| Seatpost | Aluminum micro-adjust, 26.0mm diameter |
Wheels & Tires
| Hubs | Sealed mechanism |
|---|---|
| Rims | Alex X-303, 36-hole |
| Front Tire | 20 x 2.125" Diamondback Crazy Train |
| Rear Tire | 20 x 1.95 Diamondback Crazy Train |
| Wheel Size | 20" 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 · 4 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 533.4 mm |
| Head-tube angle | 74° |
| Seat-tube angle | 71° |
| Chainstay / rear center | 387.3 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
Aluminum micro-adjust
26.0mm diameter
Alex X-303
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
- Front: 20 x 2.125" Diamondback Crazy Train, Rear: 20 x 1.95 Diamondback Crazy Train
- Drivetrain
- 1-speed
- Seatpost diameter
- 26 mm
- Bottom bracket / shell
- Steel retainer style
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: Diamondback RMX · Chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Crankset: 1-piece 180mm, 44 teeth · Bottom bracket: Steel retainer style · Rear cogs: 1-speed, 16 teeth · Chain: KMC Z410, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: ProMax 295l rear brakes, ProMax 63l rear levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Alex X-303, 36-hole · Hubs: Sealed mechanism · Front tire: Front: 20 x 2.125" Diamondback Crazy Train, Rear: 20 x 1.95 Diamondback Crazy Train
Controls and contact points
Archived: Headset: 1 1/8" threadless Tange Seiki TG-3 · Handlebar: Chromoly BMX · Stem: Aluminum · Seatpost: Aluminum micro-adjust, 26.0mm diameter · Saddle: Padded BMX · Pedals: Aluminum platform
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.