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 2009 Diamondback Viper X and 2011 Diamondback Viper X.
- Data limitation
Only 2009 Diamondback Viper X has enough published drivetrain data for gearing calculations.
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.
Gearing unavailable for this size.
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
2009 Diamondback Viper X
2011 Diamondback Viper X
Overview
Model Year
2009
2011
Brand
Diamondback
Diamondback
Model
Viper X
Viper X
Bicycle Type
BMX
BMX
Colors
Black, Red
Silver
Sizes
20.5" TT
—
Weight
—
—
Frameset
Frame Construction
TIG-welded
Steel
Frame Material
Chromoly seat tube/hi-ten steel
High-Tensile steel
Fork
—
Hi Ten
Fork Material
High-tensile steel, unicrown crown
Steel
Drivetrain
Component Group
BMX
BMX Mix
Crankset
1-piece chromoly, 44 teeth
Chromoly one-piece
Bottom Bracket
Loose ball
Loose ball
Cassette
Freewheel
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 w/traction pins
DB Sound Plastic w/ Chromo Axels
Brakes
Brakes
Rush U-brake w/SST DC Amplifier rear brakes, Rush 2-finger rear levers
—
Cockpit & Contact Points
Headset
1 1/8" FSA Threadless
1 1/8" FSA Threadless
Handlebar
Hi-Ten 2-piece
Hi-Ten 2-piece
Handlebar Extensions
Not included
Not included
Stem
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 shell w/ 3/8" axle
Rims
Aluminum, 36-hole
Aluminum, 36-hole
Spokes
14ga. (2.0mm)
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.