245/45-18 for Genesis 4.6?

[jy104]

I need to replace my tires soon and want to go one size wider.
Will it fit to 4.6 rims?

 

[homeofstone]

The 245 45 18 should work ok. Revs per mile are very close and the diameter is close to 235-50-18. Best way to check actual tread width is to comparre specs at tirerack.com

 

[wallymn]

I think the 255/45 18 would be better.

The stock do'nots turn 770 times per mile

most 255/45 18s turn about the same....

 

[msitter]

At a 255 section width, I would think about a wider wheel. Trying to squeeze an over 10" section width on to a 7.5" wheel might pinch the tire too much. Most factory wheels for that tire are at least 8.5" I don't think it will be as much of a safety issue as it will be a tire performance issue. Look up the specs on Tire Rack website, find the tire you desire on the spec chart for that tire and the rim width recommendations will be listed. A tire on a too narrow rim will tend towards uneven wear at the center of the tire and little wear on the edges at the proper pressure.

 

[motorsportsauthority]

235/50 18 have a 27.3" diameter. 245/45 18 have a 26.7" diameter. The 245's will fit the OE wheels. At 60mph on the speedometer, you'll actually be traveling approx 58.7mph.

If you got with 255/45 18 as suggested, you're looking at a 27.0" diameter which is MUCH better. At 60pmh on the speedometer, you'll actually be traveling approx 59.5mph. 255 tires may overhang since you're looking at a 0.79" increase in width.

 

[homeofstone]

235/50 18 have a 27.3" diameter. 245/45 18 have a 26.7" diameter. The 245's will fit the OE wheels. At 60mph on the speedometer, you'll actually be traveling approx 58.7mph.

If you got with 255/45 18 as suggested, you're looking at a 27.0" diameter which is MUCH better. At 60pmh on the speedometer, you'll actually be traveling approx 59.5mph. 255 tires may overhang since you're looking at a 0.79" increase in width.

Good info, however, brands vary somewhat in diameter and width within the same size. So its best to compare the exact specs on the new larger tire to the oem Dunlop specs.

 

[jy104]

Thank you all for your help.
Recently my wife put Hankook V12 evo on her car and it has good grip and very quiet. After reading all your posts, I am leaning towards 245/45-18.

 

[motorsportsauthority]

Good info, however, brands vary somewhat in diameter and width within the same size. So its best to compare the exact specs on the new larger tire to the oem Dunlop specs.

I know. That always drove me nuts. It's just a good "generalization".

 

[joedoe]

Thank you all for your help.
Recently my wife put Hankook V12 evo on her car and it has good grip and very quiet. After reading all your posts, I am leaning towards 245/45-18.

Actually the 245/50R18 is better fit than 245/45R18. Speedometer difference is 1.435% too slow vs 2.135% too fast for the later.