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 1999 Jamis Bossy 20 and 2000 Jamis Bossy 20.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Ratio2.00:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.125; rear size isn’t listed.
Ratio2.00:1
Estimated speed at 90 RPMGear
Uses front tire 20×2.125; 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
1999 Jamis Bossy 20
2000 Jamis Bossy 20
Overview
Model Year
1999
2000
Brand
Jamis
Jamis
Model
Bossy 20
Bossy 20
Bicycle Type
Juvenile
Juvenile
Original MSRP
$139.95
$150.00
Colors
Grape Purple, Pearl Aqua
Metallis Periwinkle, Rose Pedal Pink
Sizes
—
Girls 11"
Weight
—
—
Frameset
Frame Construction
TIG-welded
Pulse-welded
Frame Material
Hi-tensile steel
Hi-tensile steel, oversize
Fork
—
Jamis
Fork Material
Hi-tensile steel, unicrown crown
Hi-tensile steel, unicrown crown
Drivetrain
Component Group
Juvenile Mix
—
Crankset
1-piece 5 1/2", 36 teeth
1-piece 5 1/2", 36 teeth
Bottom Bracket
One piece
One piece
BB Shell Width
American
American
Rear Cogs
1-speed, 18 teeth
1-speed, 18 teeth
Chain
KMC 410, 1/2 x 1/8"
KMC 410, 1/2 x 1/8"
Pedals
Union
Wellgo resin
Brakes
Brakes
Coaster rear
—
Cockpit & Contact Points
Headset
1" steel
1" steel
Handlebar
Jamis cruiser
Jamis Cruiser
Stem
Alloy 4 bolt
Alloy 4 bolt
Saddle
Jamis cruiser
Jamis Bossy Cruiser
Seatpost
Pillar, aluminum, 25.4mm diameter
Alloy, 25.4mm diameter
Wheels & Tires
Hubs
Front: steel, nutted, Rear: coaster brake
Front: aluminum, nutted, Rear: Shimano Coaster Brake
Rims
Weinmann 4019, 36-hole
Weinmann 4019, 36-hole
Spokes
Stainless steel, 2.0mm straight gauge
Stainless steel, 2.0mm straight gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
20 x 2.125" CST C-640
20 x 2.125" Jamis Bossy Streat Tread
Wheel Size
20" wheels
20" wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.