What size tires for 18s?

[lanechurch920]

Hi have a set of nice 18s i wanna put on my 2wd 85 720 a friend has some new 225/60/18 Will they Fit?

[Wide14u]

thats a tall tire

[nismo24096]

nope thats almost what my wifes stock Murano runs.. way too tall...

[datzenmike]

You have 18" rims and friend has 18" tires???

 

 

Your stock tire and rim is 195/75R14s that are... 25.5" tall and 7.7" wide

Those 225/60R18 are ..................................... 28.63 tall and 8.86 wide.

 

So go take a look at your tires and imagine them being just over 1.5" larger all the way round the edge.

 

How wide are the other rims????? Those other tires are almost 9" wide so you don't want to try stretching them onto a 7" wide rim.

 

Now the big question. What is the rim off set??? Too much positive off set and the tire insides will rub the leaf springs on the back or the frame on turns. Too much negative off set and they will stick out past the wheel wells and on big bumps the body will come down on the tread. Won't even fit a lowered truck.

 

The other tire is also 12% larger, throwing the speedo off and it makes for poor acceleration too.

 

 

Never fall in love with a woman (or rim) that isn't a good fit. Make the rim fit the truck, not the other way round.

[lanechurch920]

Ok thank you guys I wont be using those tires than.. Next question what size should I get? As of now stock height but eventualy wanna just lower t bars and bock rear nothing crazy

[h190]

235/40-18  Do not let ANYBODY tell you that a 225/40-18 is the way to go, it is TOO skinny any the lip of the rim will stick out and the tires will look stretched. The 235's sit flush.

[lanechurch920]

Cool Thanks for the advice

[datzenmike]

How wide are the other rims????? Those other tires are almost 9" wide so you don't want to try stretching them onto a 7" wide rim.

 

Now the big question. What is the rim off set??? Too much positive off set and the tire insides will rub the leaf springs on the back or the frame on turns. Too much negative off set and they will stick out past the wheel wells and on big bumps the body will come down on the tread. Won't even fit a lowered truck.

 

Still need the width of rim and the offset.

 

 

Assuming they are say 8" wide a close match to the stock tire but in 18" rim size is...

 

210/45R18.... about 8.25" wide and same height so your speedo stays accurate.

215/45R18.... about 8.5" wide

235/40R18... about 9.25" wide.

 

 

235/40-18  Do not let ANYBODY tell you that a 225/40-18 is the way to go, it is TOO skinny any the lip of the rim will stick out and the tires will look stretched. The 235's sit flush.

.

How can you say that when you don't know the rim width???? Once again you need to know the rim width.... what if it's 5.5" what if it's 10"!!!!!

[h190]

Still need the width of rim and the offset.

 

 

Assuming they are say 8" wide a close match to the stock tire but in 18" rim size is...

 

210/45R18.... about 8.25" wide and same height so your speedo stays accurate.

215/45R18.... about 8.5" wide

235/40R18... about 9.25" wide.

 

 

.

How can you say that when you don't know the rim width???? Once again you need to know the rim width.... what if it's 5.5" what if it's 10"!!!!!

Lets assume these are titans, as they usually are. But yes we do need to know the width  if it is an aftermarket wheel.

[lanechurch920]

There Ultras 9" wide not sure of back spacing 

[h190]

There Ultras 9" wide not sure of back spacing 

THEN A 235/40-18" WOULD BE IN ORDER.