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 2002 Diamondback Assault T1.
- Gearing
2002 Diamondback Assault T1 has a 12% lower climbing ratio than 2001 Diamondback Assault T1.
A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.
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: 20×1.95.
Ratio2.41:1
Estimated speed at 90 RPMGear
Uses front tire 20×1.95; rear size isn’t listed.
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
2001 Diamondback Assault T1
2002 Diamondback Assault T1
Overview
Model Year
2001
2002
Brand
Diamondback
Diamondback
Model
Assault T1
Assault T1
Bicycle Type
BMX
BMX
Original MSRP
$249.99
Not documented
Colors
Piston Blue, Scorch Red
Grey
Sizes
Pro
Expert
Weight
—
—
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Chromoly
Chromoly
Fork
Diamondback RMX
—
Fork Material
Chromoly, unicrown crown
Chromoly, unicrown crown
Drivetrain
Crankset
1-piece 180mm, 44 teeth
3-piece chromoly, 41 teeth
Bottom Bracket
Steel retainer style
Loose ball
BB Shell Width
—
68mm English
Rear Cogs
1-speed, 16 teeth
1-speed, 17 teeth
Chain
KMC Z410, 1/2 x 3/32"
KMC Z-510HX, 1/2 X 3/32"
Pedals
Aluminum platform
Wellgo LU-A8U
Brakes
Brakes
ProMax 295l rear brakes, ProMax 63l rear levers
Aluminum linear-pull rear brakes, aluminum linear-pull rear levers
Cockpit & Contact Points
Headset
1 1/8" threadless Tange Seiki TG-3
1 1/8" threadless aluminum
Handlebar
Chromoly BMX
Chromoly BMX
Handlebar Extensions
Not included
—
Stem
Aluminum
Aluminum
Saddle
Padded BMX
Diamondback BMX
Seatpost
Aluminum micro-adjust, 26.0mm diameter
Aluminum, 25.4mm diameter
Wheels & Tires
Hubs
Sealed mechanism
Aluminum
Rims
Alex X-303, 36-hole
Aluminum, 48-hole
Spokes
—
Stainless steel, 14ga. (2.0mm) straight gauge
Spoke Nipples
—
Brass nipples
Front Tire
20 x 2.125" Diamondback Crazy Train
20 x 1.95" Kenda K-195
Rear Tire
20 x 1.95 Diamondback Crazy Train
—
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.