Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Data limitation
No geometry is recorded for 2008 Diamondback Viper X and 2009 Diamondback Viper X.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.75:1
Estimated speed at 90 RPMGear
Rear tire: 20×1.75.
Ratio2.75:1
Estimated speed at 90 RPMGear
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.
Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
Specification
2008 Diamondback Viper X
2009 Diamondback Viper X
Overview
Model Year
2008
2009
Brand
Diamondback
Diamondback
Model
Viper X
Viper X
Bicycle Type
BMX
BMX
Original MSRP
$190.00
Not documented
Colors
Silver, Cyan Blue
Black, Red
Sizes
20.5" top tube
20.5" TT
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly/hi-tensile steel
Chromoly seat tube/hi-ten steel
Fork
Diamondback
—
Fork Material
Hi-tensile steel, unicrown crown
High-tensile steel, unicrown crown
Drivetrain
Component Group
BMX Mix
BMX
Crankset
175mm chromoly 1-piece, 44 teeth
1-piece chromoly, 44 teeth
Bottom Bracket
Loose ball
Loose ball
Cassette
—
Freewheel
Rear Cogs
1-speed, 16 teeth
1-speed, 16 teeth
Chain
KMC Z410, 1/2 x 1/8"
KMC Z410, 1/2 x 1/8"
Pedals
DB Sound Alloy
DB Sound alloy w/traction pins
Brakes
Brakes
Rush U-brake w/SST DC Amplifier brakes, Rush 2-finger levers
Rush U-brake w/SST DC Amplifier rear brakes, Rush 2-finger rear levers
Cockpit & Contact Points
Headset
1 1/8" threadless FSA
1 1/8" FSA Threadless
Handlebar
Hi-ten steel 2-piece
Hi-Ten 2-piece
Handlebar Extensions
Not included
Not included
Stem
DB Alloy 4-bolt
Alloy 4-bolt
Saddle
DB BMX padded
DB BMX padded
Seatpost
Steel micro-adjust, 25.4mm diameter
Steel micro-adjust, 25.4mm diameter
Wheels & Tires
Hubs
Aluminum 3/8" axle
Aluminum 3/8" axle
Rims
30mm wide aluminum, 36-hole
Aluminum, 36-hole
Spokes
14ga. (2.0mm) straight gauge
14ga. (2.0mm)
Front Tire
20 x 2.125" Comp III-style
20 x 2.125" Comp III style
Rear Tire
20 x 1.75" Comp III-style
20 x 1.75" Comp III style
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.