VelopediaBicycle Archive · Specification report

1997 Jamis Bossy 20

Velopedia Archive ID 69314

Overview

Model year1997
BrandJamis
ModelBossy 20
Bicycle typeJuvenile
Archive ID69314
Original MSRP$159.95
ColorsPink, purple
Sizes12"
Weight33 lb

Frameset

Frame constructionTIG-welded
Frame materialHi-tensile steel
ForkAkisu
Fork materialHi-tensile steel, unicrown crown
Rear shockN/A

Drivetrain

Component groupN/A
ShiftersN/A
Front derailleurN/A
Rear derailleurN/A
Crankset1-piece 5 1/2", 36 teeth
Bottom bracketOne piece
BB shell width68mm Threadless
Rear cogs1-speed, 18 teeth
ChainKMC 410, 1/2 x 1/8"
PedalsVictor VP-810

Brakes

BrakesKT coaster brake

Cockpit & contact points

Headset1" Chin Haur CH60-1
HandlebarCruiser Bend
Handlebar extensionsN/A
StemHsin Lung MX-552
SaddleViscount 5034
SeatpostPillar, steel, 25.4 mm diameter

Wheels & tires

HubsFront: Kung Ten aluminum, nutted, Rear: Kung Ten coaster brake
RimsCMC 7X steel, 36-hole
SpokesShuhn Lih steel, 105g straight gauge
Spoke nipplesBrass nipples
Front tire20 x 2.125" Cheng Shin C-640
Wheel size20" wheels

Geometry · Legacy reference

Top tube457.2 mm
Head-tube angle73°
Seat-tube angle71°
Chainstay / rear center373.4 mm
Wheelbase901.7 mm
Fork offset / rake35.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.