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.
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.
Ratio2.75:1
Speed unavailable: wheel or tire size is missing or unclear.
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
1999 Diamondback Reactor
1997 Diamondback Reactor
Overview
Model Year
1999
1997
Brand
Diamondback
Diamondback
Model
Reactor
Reactor
Bicycle Type
BMX
BMX
Original MSRP
$424.99
$400.00
Colors
Ball-Burnished, Orange
Brushed
Sizes
Pro XL
Boys 9.5"
Weight
27.8 lb
22.8 lb
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
6061 T6 aluminum
7005 aluminum
Fork
Diamondback
Diamondback
Fork Material
Chromoly, unicrown crown
Chromoly, unicrown crown
Drivetrain
Crankset
Diamondback, 44 teeth
1-piece 3 1/2", 44 teeth
Bottom Bracket
Diamondback
Victor VPB-35
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 3/32"
Pedals
Platform, aluminum
Wellgo LU-313
Brakes
Brakes
Tektro linear-pull rear brakes, Tektro alloy linear-pull rear levers
Tektro 867A brakes, Dia-Compe MX-101 levers
Cockpit & Contact Points
Headset
1 1/8" threadless Tioga TG
1 1/8" threadless Dia-Compe Kontak Aheadset ST-2
Handlebar
Diamondback 4130 chromoly
Hsin Lung
Stem
Forged alloy ahead
Lee Chi
Saddle
Padded saddle
Velo VL-247
Seatpost
Alloy, 27.0mm diameter
Kalloy SP-257, 27.0 mm diameter
Wheels & Tires
Hubs
Diamondback Slasher
King Kong 370
Rims
Mavic double wall, 36-hole
Weinmann 4019, 36-hole
Spokes
Shuhn Lih stainless steel, 2.0mm straight gauge
Chung Nan stainless steel, 2.0mm straight gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
20 x 2.125" Ritchey Speed Max
20 x 2.125" Tioga Comp III
Rear Tire
20 x 1.95" Ritchey Speed Max
20 x 1.75" Tioga Comp III
Wheel Size
20" wheels
20" wheels
Geometry · choose a size for each bicycle
Geometry size
Head-tube angle
75°
75°
Seat-tube angle
71°
71°
Chainstay / rear center
393.7 mm
393.7 mm
Wheelbase
965.2 mm
965.2 mm
Fork offset / rake
20 mm
30.5 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.