Bicycle Archive · Specification report

1999 Jamis Bossy 20

Velopedia Archive ID 88105

Overview

Model year	1999
Brand	Jamis
Model	Bossy 20
Bicycle type	Juvenile
Archive ID	88105
Original MSRP	$139.95
Colors	Grape Purple, Pearl Aqua

Frameset

Frame construction	TIG-welded
Frame material	Hi-tensile steel
Fork material	Hi-tensile steel, unicrown crown
Rear shock	N/A

Drivetrain

Component group	Juvenile Mix
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece 5 1/2", 36 teeth
Bottom bracket	One piece
BB shell width	American
Rear cogs	1-speed, 18 teeth
Chain	KMC 410, 1/2 x 1/8"
Pedals	Union

Brakes

Brakes	Coaster rear

Cockpit & contact points

Headset	1" steel
Handlebar	Jamis cruiser
Handlebar extensions	N/A
Stem	Alloy 4 bolt
Saddle	Jamis cruiser
Seatpost	Pillar, aluminum, 25.4mm diameter

Wheels & tires

Hubs	Front: steel, nutted, Rear: coaster brake
Rims	Weinmann 4019, 36-hole
Spokes	Stainless steel, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 2.125" CST C-640
Wheel size	20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 27, 2026.