- Frame
- Chromoly/hi-tensile steel
- Brakes
- Dia-Compe VC-1 brakes, Lee Chi 315A-1 levers
Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
No key difference could be established from the available data. Check the full table for the details.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.69:1
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
1996 Diamondback Assault
1999 Diamondback Assault
Overview
Model Year
1996
1999
Brand
Diamondback
Diamondback
Model
Assault
Assault
Bicycle Type
BMX
BMX
Original MSRP
$240.00
$244.99
Colors
Chrome-plated
Ball-Burnished, Green
Sizes
Boys 12"
Pro XL
Weight
26.2 lb
26.5 lb
Frameset
Frame Construction
TIG-welded steel
TIG-welded
Frame Material
Chromoly/hi-tensile steel
6061 T6 aluminum
Fork
Diamondback
Diamondback
Fork Material
Hi-tensile steel, unicrown crown
Chromoly, oversize, unicrown crown
Drivetrain
Crankset
1-piece chromoly 6 1/2", 43 teeth
1-piece chromoly, 44 teeth
Bottom Bracket
Victor VPB-35
YST BB 621
BB Shell Width
68mm Threadless
68mm Threadless
Rear Cogs
1-speed, 16 teeth
1-speed, 16 teeth
Chain
KMC HP-20, 1/2 x 3/32"
KMC HP-20, 1/2 x 1/8"
Pedals
HTI P-71
Platform, aluminum
Brakes
Brakes
Dia-Compe VC-1 brakes, Lee Chi 315A-1 levers
Lee Chi ProMax linear-pull rear brakes, Lee Chi ProMax rear levers
Cockpit & Contact Points
Headset
1" Victor VP-755
1 1/8" threadless Tioga TG
Handlebar
BMX steel
Diamondback steel
Stem
Diamondback BMX
Alloy Ahead type
Saddle
Diamondback BMX
Padded saddle
Seatpost
Steel, 26.0 mm diameter
Alloy, 27.0mm diameter
Wheels & Tires
Hubs
—
Alloy
Rims
Weinmann 4019, 36-hole
Alloy, 36-hole
Spokes
Steel, 2.0mm straight gauge
Shuhn Lih steel, 2.0mm straight gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
20 x 2.125" Cheng Shin C-714
20 x 2.125" Comp III style
Rear Tire
20 x 1.75" Cheng Shin C-714
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
75°
75°
Seat-tube angle
70°
71°
Chainstay / rear center
395 mm
393.7 mm
Wheelbase
—
965.2 mm
Fork offset / rake
30 mm
20 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.