Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
2004 Diamondback Octane 20
Value Guide market data · 2004 Diamondback Octane 20
12-month trend
— %
Direction and magnitude, not judgment
vs. category average
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Price over time - 2004 Diamondback Octane 20
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Octane model years
2004 Octane 20 lineup
Overview
About this bike
2004 Diamondback Octane 20 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame Construction
- TIG-welded
- Frame Tubing Material
- Aluminum
- Fork Brand & Model
- SR Suntour M-2000, 20inch, 30mm
- Fork Material
- Aluminum, single crown
- Rear Shock
- Not applicable
Drivetrain
- Groupset
- 2004 Diamondback Octane 20
- Component Group
- Mountain Mix
- Shift Levers
- Shimano Revo, Right Only
- Crankset
- OPC w/chainguard
- Bottom Bracket
- One piece
- Rear Cogs
- 6-speed, 14 - 28 teeth
- Chain
- KMC, 1/2 x 3/32inch
Brakes
- Brakeset
- Coaster w/aluminum linear-pull rear brakes, resin/aluminum, w/reach adjust rear levers
Cockpit
- Seatpost
- Steel Post
- Saddle
- DB Jr. ATB Padded
- Handlebar
- Jr. ATB Riser
- Handlebar Stem
- Alloy, adjustable rise
- Headset
- 1 1/8inch Aheadset
Wheels & Tires
- Hubs
- Front: steel, nutted, Rear: steel, coaster brake
- Rims
- Alloy MTB, 36-hole
- Tires
- 20 x 2.00inch Jr ATB
- Spoke Brand
- UCP, 14ga. (2.0mm) straight gauge
Pedals
- Pedals
- BMX style resin
Accessories
- Colors
- Black/Red (Boys), Periwinkle/Silver (Girls)
- Extensions
- Not included
Weight & Sizing
- Sizes
- 20inch, Boys and Girls
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.