Velopedia Bicycle Archive
Compare Bicycles
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.
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
2006 Diamondback Viper
Overview
Model Year
2008
2006
Brand
Diamondback
Diamondback
Model
Viper
Viper
Bicycle Type
BMX
BMX
Original MSRP
$150.00
$139.00
Colors
Black, Green
Blue, Black
Sizes
19.5" top tube
—
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Hi-tensile steel
Steel
Fork
Diamondback
Db
Fork Material
Hi-tensile steel, unicrown crown
Steel, unicrown crown
Drivetrain
Component Group
BMX Mix
—
Crankset
165mm steel 1-piece, 44 teeth
Chromoly one-piece, 44 teeth
Bottom Bracket
Loose ball
Loose ball
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
Resin Platform
Resin
Brakes
Brakes
Rush linear brakes, Rush RX2.1 levers
Rush linear-pull rear brakes, Rush aluminum rear levers
Cockpit & Contact Points
Headset
1 1/8" threadless FSA
1 1/8" threadless FSA
Handlebar
Hi-ten steel 2-piece
DB 2-piece JR
Handlebar Extensions
Not included
—
Stem
DB Alloy 4-bolt
Aluminum
Saddle
DB BMX padded
DB Padded
Seatpost
Steel pillar
Steel, 25.4mm diameter
Wheels & Tires
Hubs
Steel 3/8" axle
Steel
Rims
30mm wide aluminum, 36-hole
Alex C303, 36-hole
Spokes
14ga. (2.0mm) straight gauge
14ga. (2.0mm) straight gauge
Spoke Nipples
—
Brass nipples
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
—
70°
Chainstay / rear center
—
368.3 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.