View Here : Tire Width Vs Wheel Width
Rim width and tire width are two closely related sizes. Flexible tire sidewalls alow a single tire size to be mounted on a rim of various widths. There is a rim width range for every tire size, but on the other side, there is a tire width range for every single rim size.
Upgrade to Aftermarket Wheels …(a tire's "footprint") is relative to the width of the tires, and being that the width is 225 vs. 205, you have gained 20 mm in width. This will work very similar on most vehicles. As you increase the wheel size, the width of the wheel also increases. To compensate, the width of the tire…
For example, a tire in the P205/60R15 size is measured on a 6.0" wide wheel and this size tire has an approved rim width range from 5.5" to 7.5" wide. The tire has a section width of 8.23" (209mm) when mounted on a 6.0" wide wheel.
Tire width vs rim width Sheldon says 1.5 to 2x tire width to rim width, does that hold true for MTB tires as well as road tires? I wouldn't think so or we'd all be on 50-60mm rims for a basic 2.1 tire.
For anyone interested in some real world data regarding the effect of rim width on tire width and diameter there's an article in the Tech Section of the Gravityworx website showing a side by side comparison of the same tire on two different width rims.
What is an optimal tire to rim width ratio for general trail use. This would be for driving to and from trails, and moderate trail driving. For example, I'm considering a 37x13.5 tire. Should I run a 8" or 10" wheel? All manufactures reccomendations aside, what works best.
Tread width matching rim width is pretty much how i like to run...it gives the best balance between agility and grip from my experience. Right now I'm running 205/45-17 street tires on 17x7.5" wheels with a +40mm offset for my FR-S. Stock tire size is 215/45-17 on 17x7" wheels with a +48mm offset.
The industry rule of thumb is that for every 1/2" change in rim width, the tire's section width will correspondingly change by approximately 2/10". For example: a tire in the P205/60R15 size is measured on a 6.0" wide wheel and this size tire has an approved rim width range from 5.5" to 7.5" wide.
For instance at Mavic, on the CXR 60 clincher, we had to use a 13mm inner rim width to be able to fit our CX01 Blades on the rim wall tips, but the outer rim width is 27mm which is substantially larger than the 23mm tire we’re using on that wheel.