[Igobuk]

This is a handy website for tire size changes...

http://www.tiresizecalculator.info/

You put in your current tire size and a table appears with all comparable tires up and down in size and the % changes to your speedo, etc. Everything you'd need... here's an example of your results. Now that you see the results, cross-reference the sizes with the make/model of tire you want and see what you can put on the Ody and what will happen to the speedometer. More than a 3% difference is bad for any vehicle so stay within this range. Try the website, many more sizes than this sample comes up.

Hope this helps.

215 70/16, diameter diff: -0.63% , speedometer will read faster than actual.
335 45/16, diameter diff: -0.56% , speedometer will read faster than actual.
275 55/16, diameter diff: -0.42% , speedometer will read faster than actual.
305 50/16, diameter diff: -0.07% , speedometer will read faster than actual.
235 65/16, CURRENT SIZE
255 60/16, diameter diff: +0.07% , speedometer will read slower than actual.
205 75/16, diameter diff: +0.28% , speedometer will read slower than actual.
195 80/16, diameter diff: +0.91% , speedometer will read slower than actual.
285 55/16, diameter diff: +1.12% , speedometer will read slower than actual.

 

[Igobuk]

You can also compare against a specific size. And if you punch in the 2 sizes you want to compare you get a comparison chart. Doesn't look like it'd be a good size to get.

Original tire
Sidewall: 6.01 in
Radius: 14.01 in
Diameter: 28.03 in
Circumf: 88.05 in
Revs/mile: 719.58

New Tire
Sidewall: 5.55 in
Radius: 13.55 in
Diameter: 27.10 in
Circumf: 85.14 in
Revs/mile: 744.15


Speedometer reading with new tire is 3.30% too fast.
When your speedometer is reading 60mph you are actually traveling 57.95mph.

 

[valestrand1]

Thanks for you help. I guess I will look at the trz or the p4.

 

[Igobuk]

I sent you a PM.