I just bought a 1914 Touring. It has the wrong front wheels. They are square felloe with 30x3-1/2 tires. I can not find any info as to what years used 30x3-1/2 clincher front tires. I have not measured yet, but I was under the assumption that 30x3 and 30x3-1/2 use different rim diameters.
Export Model T's used 30 X 3 1/2 wheels on all four as early as 1909. Those wheels, being square fellow, are no earlier than 1918. If the tire size is 30 X 3 1/2 then you can calculate the rim size as follows:
Assembled wheel + tire diameter = 30 inches.
Tire cross section = 3 1/2".
30 - (3.5 + 3.5) = 23 inches.
Yes, different wheel diameters are required...
To the best of my knowledge, 30 x 3.5 were never used as front tires ex factory...unless the car was Canadian Walkerville built and then tires were 30 x 3.5 all the way around.
If you have front wheels for 30 x 3.5, and you are not a Canada built, then there is a silver lining if you keep them that way...you only have to have one spare tube and one spare tire
do you mean my wheels are not correct for a Ford Ranger?
Does your car have front doors on both sides? If so, it is Canadian and the 30X3 1/2 wheels are correct.
Unless you want to be 100% authentic, it doesn't make any difference. Either size will serve you just as well and you won't need two size spare tires.
It's not Canadian. the rear wheels have the correct rounded fellow, and are in better condition. The fronts have a square fellow.
My unrestored 1917 roadster has 30 x 3.5 square felloe front wheels.
They were installed by the original owner. He drove the car until 1947. One guess as to the reason is, as the car got older, new and used 30 x 3.5 tires may have been more readily available than 30 x 3 tires.
The original wheels on my 1917 runabout were round fellow. It had all four of the original Ford script tires on it when dad bought it from the original owner in 1951. Note that the wheels on the car in this photo are not the originals, they are 5 lug Firestone demountables that dad put on the car because the original tires were not roadworthy.
Some folks used to stretch a 30 X 3 1/2 tire onto a 30 X 3 rim when the 30 X 3 tires were not available. Best to measure the rim itself. BTW a friend had a pair of 30 X 3 1/2 tires that had been stretched, they would just fall onto the 30 X 3 1/2 rims.
I repaired a T where that had been done, left the tires unmounted in a warm place for a few days; they remounted on a 3x3-12 rim, no problems.
My roadster has its original round felloe rears.
My dad has the original round felloes on his '17 touring.
Gary. They are the wrong color
I thought that the rims were an inch larger in diameter for the 30x3 tires.
30 - 3 - 3 = 24 inch wheels
30 - 3.5 - 3.5 = 23 inch wheels
I find it very hard to believe that a tire meant for a 23 inch rim can be stretched onto a 24 inch rim.
I have seen it done. It does make a difference the age, maker, and condition of tires. Some are tighter fits than others. A softer, looser, 30X3 1/2 will stretch onto a 24 inch rim easier than a heavier, or older, tire will.
The reverse also works. A 24 inch 30X3 tire can be carefully made to hold onto a 30X3 1/2 23 inch clincher rim. I watched it being done on a tour one time when a fellow had a blow-out on his T, and the only spare available was a 30x3 carried by an early car.
Very common as alot of car were kept rolling down the road with whatever parts can be had