Post by
SolaraOnBronze »
https://forums.nicoclub.com/solaraonbronze-u107872.html
Mon Feb 22, 2010 1:36 pm
You may be correct, and I am considering what you have to say. However, I don't like to rely on those tire calculator websites when stretch is involved. Please keep in mind that the rear tire is going to be stretched over a 9.5" wide wheel and the front will be stretched over a 9" wide wheel. While this may not make a HUGE difference, there will be a difference in circumference. a 225/45 on a 9.5 will have a smaller overall diameter than a 225/45 on a 9, but I'm sure you know this.
I will do some more research and reevaluate my choice. I chose those sizes based on what I was planning to run with 17s all around, which was 225/45/17 R and 215/45/17 front. You're probably right, though- maybe the sidewall should drop to a 40 series out back with the larger wheel in the rear. I've never really been one to be obsessed with the numbers that those tire calculators spit out.
For example, it said that my previous tire sizing was all within about .2% of stock diameter. However, my speedometer was off by 6-7mph last summer. This has to do with the tires being put on a wheel that is wider than they are intended for. Since all tires stretch differently, there really isn't a way to use these calculators accurately in this situation.
I think a 40 is probably a better choice out back though, despite you calling me a dumbass. The decision to run an 18 only came to life a couple of days ago, so I should have done some more research. Luckily, the wheels won't be here and ready for tires for at least a month, so I have plenty of time to change the tire size I ordered. Thanks for the input!