Yah 265/45s on and 18 inch rim is gonna give you a monster truck

 

Jumping onto the thread. If I went with WORK 18x8.5 front and rear or 18x9 f/r, what offset would I be looking at gettingto have them sit flush or close to it? With and with out rolled fenders. Include tire size as well. Thanks for any info.

Just to keep everything in one post. May also be considering 17's as well with the width listed above. If you have the time please include. Thanks again.

 

Ok first thing's first:

Offsets:

I have 17x9's and they are almost EXACTLY flush with +17,

so I would say anywhere from +14-->+20 would be pretty good for a 9" rim

For a 8.5" rim, then, I would say flush would be in the range of +9-->+13


Next, tire size:

Stock tires are 205/55/16

This gives you a total wheel height of:

16 inches*25.4=406.4 mm

Sidewall height= 0.55*205=112.75 mm

Combined height= wheel +2 sidewalls = 631.9 mm


Now, to keep your speedometer correct, you should pick tires for the new rims that give the same overall height....

Option 1: 18x8.5

631.9-18*25.4=174.7 mm, or 87.35 mm per sidewall

8.5*25.4= 215.9 mm wheel width

Lets say you run 245/35 tires

Then, 0.35*245=85.75 mm

Each sidewall will be within 1.6 mm, or the total height of wheel and tire will be within 3.2 mm (out of a total height of about 632 mm)


For a more "stretched" look, you could run 215/40/18, which gives a sidewall height of 86mm, or a toal error of only 2.7 mm compared to stock (practically nothing)



Option 2: 18x9

Same calculations as above.....

9 inch wheel = 228.6mm

245/35/18 will look really good, not stretched, but not "beefy" either

215/40/18 will be a bit stretched



Option 3: 17x9

This is what I have...

I run 245/40/17, gives total height of 627.8mm

They look neither stretched nor bulky, the edge of the sidewall is almost perfectly flush with the edge of the wheel lip

I have yet to be able to find anything that is wider and lower profile (i.e. xxx/35/17)



Option 4: 17x8.5

again, 8.5 inches= 215.9 mm wide wheel

you can do 225/45/17, which again will not be stretched, nor bulky

There isn't much use in going lower than 225, just because why would you want wider rims, but then only having the stock size tire?

You could also run 255/40/17, these will look a bit bulky, but not terribly bulky



Hope this all helped, and I hope you see how I did the calculations...it makes it much easier to buy wheels and tires when you understand the numbers