Prototype Racing Tire, circa 1960
01
Artifact Overview
Bobby Unser made his reputation in the Pikes Peak International Hill Climb. The course had a dirt surface when Unser raced it, so he searched for ways to improve tire traction. Unser tried grinding up various substances and mixing the results into rubber to produce a tire with more grip. The most effective material turned out to be ground walnut shells.
Artifact Details
Artifact
Tire
Date Made
circa 1960
Place of Creation
Creator Notes
Made by Goodyear Tire and Rubber Company based on specifications from Bobby Unser.
Collection Title
Location
Not on exhibit to the public.
Object ID
2009.171.13
Credit
From the Collections of The Henry Ford. Gift of Bobby and Lisa Unser.
Material
Rubber (Material)
Metal
Color
Black (Color)
Blue
Dimensions
Diameter: 28 in
Thickness: 7.25 in
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