I couldn't remember if this was on before, but worth a second look
Double whitewalls on a T truck. Now that is something!
That's the standard tires Ford equipped the T's with for a few years by the end of the teens, I think? The Rip Van Winkle 1917 T has tires like that. Earlier tires were all white or off white natural rubber.
As WW1 made rubber harder to get and more expensive, filler materials were tested and coal powder was found to give the rubber better wear characteristics, so it was kept even after the war ended - but only for the thread area, leaving the side walls in natural rubber color.
Later in the 20's all black tires got popular and most tires stayed all black until the late 40's when white side walls came back in vogue to stay until the early 60's - since then mostly on vintage cars.
Thank you for your numerous great postings and for pointing us to the Rip Van Winkle Ford as an example. It looks like they probably did produce double white side wall tires back in the day (at least during 1917 time frame). Below is a photo of its front tire from page 37 of the May-Jun 1971 “Vintage Ford” (used by permission to promote our hobby and our club).
The caption in the article did not mention the double white sidewalls, but in Bruce’s book on page 274 Bruce stated, “Note the white sidewalls.”
The photo of the van shows the below the axle wishbone and the license plate is 1920. So it is probably a 1919 to 1920 chassis and those might have been the tires supplied new. If it had been a 1918 or earlier chassis photographed in 1920 the tires most likely would have been replaced if the chassis had been used much.
Hap l9l5 cut off
While looking at a few more posting, Dan had also posted a link to another wreck in the woods on Shorpy. That photo of a 1919-1920 electric equipped touring also appears to have the white sidewall. Look at the right front tire at: http://www.shorpy.com/node/15586?size=_original#caption and shown below. It also appears to have accessory hub caps.
Hap l9l5 cut off