For years, I've had a set of factory 300F photos that I got from Chrysler after getting my 300F. In this set of photos includes the car above, which I nicknamed the Zig Zag car due to the flooring seen in the several photos of it. One of the photos in the set is a close up of one of the tires, and I could see that looks like the sidewall fill valve used on the Goodyear Captive-Air tires that were available in the 1950s-1960s. Captive-Air tires had an inner "Safety Spare" liner that would let you drive along if you had a loss of air in the main tire due to a puncture or other cause, as long as the inner liner was not punctured. The inner liner was filled with the regular tire valve and the main tire was filled through a blue rubber tire valve in the sidewall. Filling the main tire was accomplished with a special inflator tool on the air hose, much as you would fill a football. This inflator tool, and an instruction booklet, would have been provided in the glove box of each car equipped with Captive-Air tires.
I was always curious about this photo but assumed it was an early press car that they had fitted Captive-Air tires to instead of the standard Blue Streak tires. The fact that the tire looked like it was a little low on pressure reinforced this idea. While looking at some other Captive-Air tire information related to my 1960 Chrysler New Yorker Town & Country wagon, I came across some documentation that showed that Goodyear did actually make Blue Streak Captive-Air tires in 1959 and 1960. I went back to these photos and under further examination, it does indeed say Blue Streak on the sidewall. It doesn't say Captive-Air on the front of the tire though.
This lead me to ask 300 club members to see if anyone had an original Blue Streak tire in their 300F to try and get some clarification. The following information is a summary of what was found. Some of the statements below are my own assumptions and opinions as factory information is very limited. While this started out to just be about the 300F, it appears that the 300E used the same tires and falls under these conditions, so it is included here as well.
Original Blue Streak 9.00x14 tire. Shows the blue filler valve in sidewall. Also shows text on back of tire stating that the valve is for use with optional Captive-Air Safety Shield. Note that no Safety Shield liner is visible between rim and tire.
Blue Streak tire in 300F convertible that appears to have Captive-Air Safety Shield liner installed. Note space between whitewall and rim. Car was coded 96 for the standard Blue Streak tires. Unfortunately, the tire was lost during restoration of car.
Blue Streak tire on a 300E project car. Note that no Safety Shield liner is visible between rim and tire.
Captive-Air tire label found on 300F driver door. Decal was reproduced by Gary Goers. Car was coded 96 for the standard Blue Streak tires. Jack instruction label was in trunk.
Vintage classified ads for 300Es and 300Fs from 1959-1963 that mention Captive-Air tires. Note that one states it has 5 tires.
This is the Safety-Shield inner liner that was used in the Captive-Air tires in this era. There would have been different sizes to match the tires.
Thanks to the following members for providing photos and information used in researching this article; Bob Merritt, Dave Mason, Marshall Larson, Steve Beard, Dan Reitz, Steve Albu, John Cote, Noel Hastalis and Randy Guyer.
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