History of 10.50-16 tyres

[Andrew H.]

Originally Posted by mlombard

I've seen photos of Bagnold running around the Libyan desert pre WWII in old Ford Model A's with ballon tyres , but they were not 9.00-13's, from memory.
Its all interesting history.

See attached photos for Model A balloon tyres in the Egyptian desert in the early 1930s (Some are Bagnold and some Arkwright).

[mlombard]

Originally Posted by Andrew H.

See attached photos for Model A balloon tyres in the Egyptian desert in the early 1930s (Some are Bagnold and some Awkwright).

Oh ok, maybe I was wrong these look like or pretty similar to a 9.00x13 tyre, wish I could blow the pictures up enough to read the sidewalls.

[mlombard]

Originally Posted by Andrew H.

See attached photos for Model A balloon tyres in the Egyptian desert in the early 1930s (Some are Bagnold and some Awkwright).

hi Andrew the lower photo, was of the type I'd seen on other Bagnold photos, the first three I had not seen before

[Mike K]

Another possible user of 9.00-13 tyres would have been the oil exploration teams , these guys pre WW2 , explored what is now present day Iran and Iraq , roaming across the desert .

[Andrew H.]

Originally Posted by mlombard

hi Andrew the lower photo, was of the type I'd seen on other Bagnold photos, the first three I had not seen before

Yes, the first photos (with fatter tyres) are of the British army (ie the Sudan Defence Force) expedition Model A Fords, under Captain Arkwright in the early 1930s and the last photo (with slightly less-fat tyres) are of Bagnold's Model A's. As fat tyres were adopted for desert use by Arkwright and Bagnold in the early 1930s they were probably the forerunner of the 10.5 X 16 tyres later developed for British army CMP trucks in the desert. I do not know the dimensions of the balloon Model A tyres in the photos, but for what its worth, standard Model A wheel rims from the factory had an outer diameter of 21 inches (1928-29 cars) and 19-inches (1930-31 cars) and Model AA trucks were probably larger.

[Phil Waterman]

Hi Guys

Took me awhile to find it but here is a link to older thread post with Prewar Fords with balloon tires.

http://www.mapleleafup.net/forums/sh...2&postcount=12

Cheers Phil

[cliff]

have deleted unnecessary posts for you guys

[Tony Smith]

Also, the Wartime 10.50-20 tyres were replaced post-war with 11.00-20, but it seems to be just a name change as dimensions and ratings remained the same.

And 9.00-16 and 9.26-16 tyres have identical carcass dimensions, but the 9.00 size is for "British" rims, while the 9.25 is for the tapered seat rim used on the C8A and Lynx, aka "American" rim.

[lynx42]

Originally Posted by Tony Smith

Also, the Wartime 10.50-20 tyres were replaced post-war with 11.00-20, but it seems to be just a name change as dimensions and ratings remained the same.

And 9.00-16 and 9.26-16 tyres have identical carcass dimensions, but the 9.00 size is for "British" rims, while the 9.25 is for the tapered seat rim used on the C8A and Lynx, aka "American" rim.

Tony, Not to sure you are right to say the carcass dimensions are identical. The Lynx 9:25 tyres are a low profile tyre and are many inches smaller in diameter than the 9:00 tyre. I have been told that the extra:25 is actually the width difference of the tread.

Here is a photo of my new 9:00x16 tyres next to a slightly worn 9:25x16 tyre off my Lynx. You can see the 9:00 is taller and also narrower than the 9:25 tyre.

Lynx Continues Tyres 024.JPG

The new 9:00x16 tyres did drop onto the Lynx rims very easily.

Regards Rick.

[Hanno Spoelstra]

Originally Posted by Tony Smith

Also, the Wartime 10.50-20 tyres were replaced post-war with 11.00-20, but it seems to be just a name change as dimensions and ratings remained the same.

As posted before, this actually was a wartime change - see the bold quote:

Originally Posted by Hanno Spoelstra

Indeed. I have even seen a tyre sidewall marked "11.00-20 replaces 10.50-20". I have since learned this was a "new alternative size marking" for the 10.50-20 tyres listed in the wartime Data Book of Wheeled Vehicles, so it must have been a wartime change.

Interestingly, while this tyre originally had Dunlop TrakGrip tread, it was recapped at least twice, the last time with NDCC bar tread.