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.
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
2009 Diamondback Viper X
2007 Diamondback Viper X
Overview
Model Year
2009
2007
Brand
Diamondback
Diamondback
Model
Viper X
Viper X
Bicycle Type
BMX
BMX
Original MSRP
Not documented
$180.00
Colors
Black, Red
Silver, Blue
Sizes
20.5" TT
—
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly seat tube/hi-ten steel
Remington Hi-Tensile steel
Fork
—
Diamondback
Fork Material
High-tensile steel, unicrown crown
Steel, unicrown crown
Drivetrain
Component Group
BMX
BMX Mix
Crankset
1-piece chromoly, 44 teeth
175mm cromo 1-piece, 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
Pedals
DB Sound alloy w/traction pins
Alloy platform
Brakes
Brakes
Rush U-brake w/SST DC Amplifier rear brakes, Rush 2-finger rear levers
Rush U-brake w/ SST DC Amplifier brakes, Rush 2 finger levers
Cockpit & Contact Points
Headset
1 1/8" FSA Threadless
1 1/8" threadless FSA
Handlebar
Hi-Ten 2-piece
Hi-Ten Remington steel 2-piece
Handlebar Extensions
Not included
Not included
Stem
Alloy 4-bolt
DB Alloy 4-bolt Ahead
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
Front: Aluminum shell w/ 3/8" axle, Rear: Steel shell w/ 3/8" axle
Rims
Aluminum, 36-hole
Aluminum, 36-hole
Spokes
14ga. (2.0mm)
14ga. (2.0mm) straight gauge
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
Geometry · choose a size for each bicycle
Geometry size
—
Head-tube angle
—
74°
Seat-tube angle
—
71°
Chainstay / rear center
—
387.3 mm
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run. Legacy reference geometry is model-level historical data whose corresponding frame size is not identified; compare those dimensions as reference values rather than size-normalized fit data.