Lowest1.18:1
Highest2.54:1
Total range215%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 20×1.95; rear size isn’t listed.
Velopedia Bicycle Archive
2002 Diamondback Octane 20
Original specifications: Shimano Tourney · 6-speed · mechanical rear derailleur · 20" wheels · legacy reference geometry.
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At a glance
Archive #91393- Model year
- 2002
- Category
- Kids
- Original MSRP
- $179.99
- Sizes
- 20" Boys, 20" Girls
- Colors
- Black, Blue
- Geometry
- Legacy reference
- In this record
- 26 specifications · archived image · original MSRP · geometry
Model history 8 other years
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Identification clues
2002 archived details
- Published colors
- Black, Blue
- Frame
- Hi-tensile steel, oversize
- Original equipment
- Juvenile Mix
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildHi-tensile steel, oversize · Juvenile Mix · 20" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | Hi-tensile steel, oversize |
| Fork | RST 181 CL, 2.4" travel |
| Fork Material | Hi-tensile steel, oversize, single triple-clamp crown |
Drivetrain
| Component Group | Juvenile Mix |
|---|---|
| Shifters | Shimano Revo |
| Rear Derailleur | Shimano Tourney TY-22 |
| Crankset | 1-piece 5 1/2", 33 teeth |
| Bottom Bracket | Sealed cartridge, one-piece spindle |
| BB Shell Width | American |
| Rear Cogs | 6-speed, 13 - 28 teeth |
| Chain | KMC Z-51, 1/2 x 3/32" |
| Pedals | Wellgo resin |
Brakes
| Brakes | Aluminum linear-pull brakes, aluminum linear-pull levers |
|---|
Cockpit & Contact Points
| Headset | 1" steel |
|---|---|
| Handlebar | Steel, 30mm rise |
| Handlebar Extensions | Not included |
| Stem | Steel |
| Saddle | Avenir Jr MTB |
| Seatpost | Aluminum, 25.6mm diameter |
Wheels & Tires
| Hubs | Steel, nutted |
|---|---|
| Rims | Weinmann CN-520, 36-hole |
| Spokes | Chung Nan UCP, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 20 x 1.95" Kenda K-850 |
| 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 · 6 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 464.8 mm |
| Head-tube angle | 70° |
| Seat-tube angle | 71° |
| Chainstay / rear center | 381 mm |
| Wheelbase | 883.9 mm |
| Fork offset / rake | 38.1 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
20 x 1.95" Kenda K-850
Replacement search: 20x1.95 bicycle tire Before ordering: Check rim type and tire clearance.
Aluminum linear-pull brakes
aluminum linear-pull levers
More parts (2)Fewer parts
Shimano Tourney TY-22
Aluminum
25.6mm diameter
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 1.95" Kenda K-850
- Drivetrain
- 6-speed
- Seatpost diameter
- 25.6 mm
- Bottom bracket / shell
- Sealed cartridge, one-piece spindle · American
Equipment inspection checks 11 checks based on 6 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: RST 181 CL, 2.4" travel · Hi-tensile steel, oversize, single triple-clamp crown
Suspension
Evaluate the suspension →Archived: Fork: RST 181 CL, 2.4" travel
Drivetrain
Check drivetrain wear →Archived: Group: Juvenile Mix · Shifters: Shimano Revo · Rear derailleur: Shimano Tourney TY-22 · Crankset: 1-piece 5 1/2", 33 teeth · Bottom bracket: Sealed cartridge, one-piece spindle · Rear cogs: 6-speed, 13 - 28 teeth · Chain: KMC Z-51, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Aluminum linear-pull brakes, aluminum linear-pull levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Weinmann CN-520, 36-hole · Hubs: Steel, nutted · Front tire: 20 x 1.95" Kenda K-850
Controls and contact points
Archived: Headset: 1" steel · Handlebar: Steel, 30mm rise · Stem: Steel · Seatpost: Aluminum, 25.6mm diameter · Saddle: Avenir Jr MTB · Pedals: Wellgo resin
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.