rrounds

I have 245/45-17 out back(had a 1/4 in. bolt go into one of my rear 255/40-17 tires and had to replace both rears) and the town that I was in only had the 245/45-17 tires on hand(on vacation) so that is why that size tire is on my car.

I like the way the car rides and handles, so to get the tires closer to the same diameter can I run a 235/45-17 tire(have 225/45-17 now) up front on a stock '06 with out having the tire rub on the front fender?

ROD

newchapter

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
235/45-17 4.2in 12.7in 25.3in 79.6in 796 0.0%
215/45-17 3.8in 12.3in 24.6in 77.3in 819 -2.8%
225/35-17 3.1in 11.6in 23.2in 72.9in 869 -8.4%
225/40-17 3.5in 12.0in 24.1in 75.7in 837 -4.9%
225/45-17 4.0in 12.5in 25.0in 78.5in 808 -1.4%
235/40-17 3.7in 12.2in 24.4in 76.7in 827 -3.7%
245/40-17 3.9in 12.4in 24.7in 77.6in 816 -2.4%
245/45-17 4.3in 12.8in 25.7in 80.7in 785 1.4%
255/35-17 3.5in 12.0in 24.0in 75.5in 839 -5.1%
255/40-17 4.0in 12.5in 25.0in 78.6in 806 -1.2%
255/45-17 4.5in 13.0in 26.0in 81.8in 775 2.8%

newchapter

You can see above that a 235/45 to a 245/45 is a 1.4% difference.

rrounds

I know that, but I would still like to know if a 235/45-17 tire up front will rub on a stock '06.
Here is the size of the tires that I want to run(already have the 245/45-17 out back)

235/45ZR17
Speed Rating “W” = 168mph (270kph) 93W SL Treadwear: 360
Traction: A
Temperature: A360 A A 1433 lbs.
25.5" Diam.

245/45ZR17
Speed Rating “W” = 168mph (270kph) 95W SL Treadwear: 360
Traction: A
Temperature: A360 A A 1521 lbs.
25.7" Diam.

So that is only 2/10 of one inch difference between the front and back tires.


ROD

TTMartin

If you want 235s up front you are better off going with a 235/40 tire.
http://www.tirerack.com/tires/TireSe...40&diameter=17

If you like the way the car handles why are trying to go with a wider, larger diameter tire up front?

You realize that will change the way the car handles?

If you like the way the car handles stick with what you have.

For what it's worth, I had 225/40 18s up front on my stock '06 on 18X7.5 plus 50s and had occasional rubbing. That tire is narrower and has a smaller diameter than the 235/45, so yes the 235/45 will rub.

rrounds

I think I'll try this tire up front, its the same width(even though its a 235mm) and its 4/10 of a inch taller than my 225/45-17 so it will match up better with my new rear tires(245/45-17).

http://www.tirerack.com/tires/tires....=yes&tab=Specs

ROD

Froth.

The reason you found 245/45/17's is because that's OEM fitment size for 99-03 Mustangs. Almost every tire shop worth a damn carries at least one set of them.

-Froth

Jim@tirerack

The tires you have on the rear are about 1" taller than stock. They are not a good option on the car. The speedometer, odometer and gear ratio are all off on the car. I would try to get back to the 255/40R17. The 235/45R17 could fit on the front but depending on suspension travel they could hit.

rrounds

My speedometer was the first thing I notice, my speedometer is right on with the 245/45-17 rear tires @ 65 mph(the speedometer was always 2 mph fast with the 255/40-17 tires according to my GPS).

ROD