How Big Can I Go?

[Ken_OY]

charging the rim size does not charging the tire size?

For example, tire mounted on a wheel,
(1 inch=2.54 centimeter)

P205/60R-15, the whole semidiameter = (205×0.6)+15×1/2×2.54=31.35 cm
P225/35R-19, the whole semidiameter = (225×.35)+19×1/2×2.54=32.01 cm

The size change not more than one cm, but the rim change 4 inch.
The difference between this change will be the rigidity when driving,
AM I RIGHT?
I am also wondering what size of rim I can choose.

[i3o2Matt]

225/35R-19s would be 225mm(8.85" width)*.35=78.75mm(3.1" sidewall)*2(top and bottom)+482.6mm(19" wheel)=640.1mm (25.2" overall size)
compare that to 205/60R-15s, the outcome would be 627 mm, or 24.6" for the overall size, a change in roughly .6 inches, or 1.524cm. so yes, you are close in the idea that the overall tire size doesn't change drastically, but the rim size does. you just took a different path to come to the same answer.

[millrtime]

wow, well im glad i didnt have to break out my mad calculator skills to figure those two out. couldnt u have just said that as the rim size increases, the tire size decreases and that the overall differences is not that much? there. easier to read than math...

[Ken_OY]

Originally Posted by millrtime

wow, well im glad i didnt have to break out my mad calculator skills to figure those two out. couldnt u have just said that as the rim size increases, the tire size decreases and that the overall differences is not that much? there. easier to read than math...

Yeah, U R right,
I just wanna make sure by myself, the more your do, the more you understand