Velopedia Bicycle Archive

2008 Diamondback Viper X

Original specifications: BMX Mix drivetrain · 20" wheels.

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At a glance

Archive #24073

Model year: 2008
Category: BMX
Original MSRP: $190.00
Sizes: 20.5" top tube
Colors: Silver, Cyan Blue
In this record: 23 specifications · archived image · original MSRP

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Identification clues

2008 archived details

Published colors: Silver, Cyan Blue
Frame: Chromoly/hi-tensile steel
Original equipment: BMX Mix

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

Original buildChromoly/hi-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

20.5" top tube

Published colors

SilverCyan Blue

View 2 archived size/color combinations

Size	Color
20.5" top tube	Silver
20.5" top tube	Cyan Blue

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

Frameset

Frame Construction	TIG-welded
Frame Material	Chromoly/hi-tensile steel
Fork	Diamondback
Fork Material	Hi-tensile steel, unicrown crown

Drivetrain

Component Group	BMX Mix
Crankset	175mm chromoly 1-piece, 44 teeth
Bottom Bracket	Loose ball
Rear Cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	DB Sound Alloy

Brakes

Brakes	Rush U-brake w/SST DC Amplifier brakes, Rush 2-finger levers

Cockpit & Contact Points

Headset	1 1/8" threadless FSA
Handlebar	Hi-ten steel 2-piece
Handlebar Extensions	Not included
Stem	DB Alloy 4-bolt
Saddle	DB BMX padded
Seatpost	Steel micro-adjust, 25.4mm diameter

Wheels & Tires

Hubs	Aluminum 3/8" axle
Rims	30mm wide aluminum, 36-hole
Spokes	14ga. (2.0mm) straight gauge
Front Tire	20 x 2.125" Comp III-style
Rear Tire	20 x 1.75" Comp III-style
Wheel Size	20" wheels

Gearing

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

Pedal cadence

RPM

Speed units

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.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

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

Rear tire

Rear tire marking

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).

Rim diameter (BSD, mm) Tire width (mm)

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.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
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

Original specifications

Seatpost · Original

Steel micro-adjust

25.4mm diameter

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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
Seatpost diameter: 25.4 mm
Bottom bracket / shell: Loose ball

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

2008 Diamondback Viper X