I thinking of switching from my stock 17" to a set of 18" wheels. One of the tire packages I am looking at has 245/45zr and the other has 255/40zr. Now which tire height can be used without effecting the TCS and speedo? The difference is 677mm vs 661mm, so a 1.6cm difference. Which do you guys recommend?
Thanks

 

Front, Rear, both? Width and offset of wheels? Need more information.

Lou

 

all new 18 " wheels/tires. fronts will be either 40's or 45's. offset is 35, not really worried about the wheels fitment, just need to know which sidewall size to get to keep things normal....
thanks

 

Lou ;I think you have a Z with g35 tires and wheels 225/45R 18 245/45R 18s YES? If so I have an 04 Z AUTO and would like to make the same swich. Are there any speedo or computer issues? please advise. Thanks RON

 

lawnmore

No, I have a "G" with Nismo 18s. Dunlop SP9000 245/40 and 275/40. However, I did sell my old 18" "G" wheels to a "Z" owner. He had no issues (speedometer, computer or otherwise). He has an Enthusiast.

Lou

 

Lou; Thanks for the reply,just one other question-did that Z owner have an auto or 6mt? I know the final drive ratios are different 3.54-6mtand 3.36 auto Is that too small to matter?
Thanks
PS I spent the first two years of my life in Tucson,60 years ago!

 

Hey lawnmore

You're my age huh? I'm 65. The Enthusiast was a 6MT. Glad to hear you bought the 18" "G" wheels. They are nice, and handle well with the Michelins. Transmisson type and final drive ratio, don't matter. I just wanted something wider and lighter, hence my switch to the Nismos.

Lou

 

Hey lowrider!
Yea 8-28-40 Phoenix,but Im told I lived in Tucson. You know the first couple of years are a blurr. Anyway I got moved to So Cal in 42 thanks to WW2.My car is on order to arive in early Feb I hope.C Silver Touring- Aero- Mats- etc.My other car is a Viper and I have met the nicest people through the Viper Club.I am glad to see Nissan brings out quality people like yourself. Thank you for your thoughts and for helping me, and other people.
Ron

 

vfr350

you can check all that here
http://www.miata.net/garage/tirecalc.html

 

Thanks for your help!

 

the correct profile size depends on width and front or rear.

245/40 275/40 are the same as 225/45 and 245/45. all on 18" rims.

 

Thanks for your help. Now tell me about the led bulbs etc.