“How long does it take to eat a tire?”/“A good year.”

A popular riddle on a famous tire company is:
 
Q: How long does it take to eat a tire?
A: A good year (Goodyear).
 
“How long does it take an elephant to eat a tire? A good year (Goodyear)” was incuded in a 1993 joke book. “How long does it take to eat a tire?  A GoodYear”—without the elephant—was posted to the newsgroup alt.teens.penpals on October 29, 1999.
 
 
Wikipedia: Goodyear Tire & Rubber Company
The Goodyear Tire & Rubber Company is an American multinational tire manufacturing company founded in 1898 by Frank Seiberling and based in Akron, Ohio. Goodyear manufactures tires for automobiles, commercial trucks, light trucks, motorcycles, SUVs, race cars, airplanes, farm equipment and heavy earth-mover machinery.
 
The company was named after American Charles Goodyear, inventor of vulcanized rubber. The first Goodyear tires became popular because they were easily detachable and required little maintenance.
 
Google Books
Kids’ Funniest Jokes
Edited by Sheila Anne Barry
Illustrated by Jeff Sinclair
New York, NY: Sterling Publishing Company, Inc.
1993
Pg. 19:
How long does it take an elephant to eat a tire?
A good year (Goodyear).
MATT KELLER, 8
 
26 October 1999, Los Angeles (CA) Times, “The Kids’ Reading Room: Pint-Sized Punch Lines,” pg. E8, col. 3:
How long does it take an elephant to eat a tire? A good year.
(LeLand, 9, St. Patrick’s Day School. Thousand Oaks)
   
Google Groups: alt.teens.penpals
Indigestion.
merry mcgrath
10/29/99
How long does it take to eat a tire?  A GoodYear.
     
Twitter
Valerie C. Laganiere
‏@vlaganiere
La blague poche de jour qui fait rire en plein traffic montréalais: “How long does it take to an elephant to eat a tire? - A “goodyear”...!
3:34 PM - 27 Sep 2011
 
Twitter
Dylan.
‏@powers_dylan
How long would it take to eat a tire? Probably about a Goodyear. #ClassicJokeTuesday
2:20 PM - 10 Sep 2013
 
Twitter
Ellen DeGeneres
‏@TheEllenShow
How long does it take to eat a tire? A good year. #ClassicJokeFriday
4:41 PM - 30 Jan 2015
 
Reddit—Jokes
How long does it take to eat a tire?
submitted January 31, 2015 by IRateThingsYup
A Goodyear