Velopedia Bicycle Archive

2008 Diamondback Viper

Original specifications: BMX Mix drivetrain · 20" wheels.

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At a glance

Archive #24074
Model year
2008
Category
BMX
Original MSRP
$150.00
Sizes
19.5" top tube
Colors
Black, Green
In this record
23 specifications · archived image · original MSRP
Model history 13 other years

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Identification clues

2008 archived details

Published colors
Black, Green
Frame
Hi-tensile steel
Original equipment
BMX Mix

Clues, not proof of model year. Colors vary and components may have been replaced.

Campaign
Original buildHi-tensile steel · BMX Mix · 20" wheels

Historical catalog variants

Archived sizes and colors

2 item records

Item-level catalog entries recovered from Velopedia’s original bicycle archive. They document how this model was listed historically; they do not identify the frame size associated with legacy reference geometry or indicate current availability.

Published sizes

19.5" top tube

Published colors

BlackGreen
View 2 archived size/color combinations
SizeColor
19.5" top tubeBlack
19.5" top tubeGreen

Historical catalog evidence. Exact specifications and naming may vary by market, production run or manufacturer revision.

Frameset

Frame ConstructionTIG-welded
Frame MaterialHi-tensile steel
ForkDiamondback
Fork MaterialHi-tensile steel, unicrown crown

Drivetrain

Component GroupBMX Mix
Crankset165mm steel 1-piece, 44 teeth
Bottom BracketLoose ball
Rear Cogs1-speed, 16 teeth
ChainKMC Z410, 1/2 x 1/8"
PedalsResin Platform

Brakes

BrakesRush linear brakes, Rush RX2.1 levers

Cockpit & Contact Points

Headset1 1/8" threadless FSA
HandlebarHi-ten steel 2-piece
Handlebar ExtensionsNot included
StemDB Alloy 4-bolt
SaddleDB BMX padded
SeatpostSteel pillar

Wheels & Tires

HubsSteel 3/8" axle
Rims30mm wide aluminum, 36-hole
Spokes14ga. (2.0mm) straight gauge
Front Tire20 x 2.125" Comp III-style
Rear Tire20 x 1.75" Comp III-style
Wheel Size20" wheels

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

Published build44T · 16T · 1-speed
Ratio2.75:1
Estimated speed At 90 RPM Gear14.4 mph

Rear tire: 20×1.75.

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 other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

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" Comp III-style, Rear: 20 x 1.75" Comp III-style
Drivetrain
1-speed
Bottom bracket / shell
Loose ball
Campaign
Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
0 of 10 checked Progress stays in this browser for this record.

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 · Hi-tensile steel, unicrown crown

Drivetrain

Check drivetrain wear →

Archived: Group: BMX Mix · Crankset: 165mm steel 1-piece, 44 teeth · Bottom bracket: Loose ball · Rear cogs: 1-speed, 16 teeth · Chain: KMC Z410, 1/2 x 1/8"

Brakes

Inspect the brakes →

Archived: Brakes: Rush linear brakes, Rush RX2.1 levers

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 20" wheels · Rims: 30mm wide aluminum, 36-hole · Hubs: Steel 3/8" axle · Front tire: Front: 20 x 2.125" Comp III-style, Rear: 20 x 1.75" Comp III-style

Controls and contact points

Archived: Headset: 1 1/8" threadless FSA · Handlebar: Hi-ten steel 2-piece · Stem: DB Alloy 4-bolt · Seatpost: Steel pillar · Saddle: DB BMX padded · Pedals: Resin Platform

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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