G35 sedan- new 18" tires and rims?

[rayman]

Sorry if a stupid question.
I have a 2003.5 6mt sedan.
Should I get new 18" tires and rims or stick with the stock 17" 5 spoke wheels and get lower profile tires?

[some.devil]

Good question, I just bought a 03.5 6mt... I would love some opinions on the wheels.. I do like the 5 spoke sport wheels on it now but I feel that it will need some beefier tires for the summer

[dholly]

Wheel/tire style/size are a personal choice. If you search around a bit you will see some nice examples and suggestions. The only 'non-negotiable' issue; whatever size combination of new wheel and rubber you use, it must equal the same rolling diameter as the OEM tire/wheel for the ECU, TCS and ABS to function properly. Actually, past member experience has shown up to 2%-3% rolling diameter difference is acceptable and safe. Use THIS TIRE CALCULATOR to test for compatibility. Then, learn about offsets. That's where the real fun begins. Good luck!

[MikeG356MT]

Thanks for that calculator! I actually found that 235/50-17 are preferable to 45 series when I upgrade (still with 17 inch wheels) from 215/55-17's. They are most compatible! The speedo differences and overall sizes with the 235/50-17's are very very slight. Thanks!

[kfreefall]

Hey Mike, you might want to keep an eye on this post as it is attempting to provide some answers about stepping up to wider tire. I am of the philosophy that more rubber on the road is better and have been very happy with the 235/50/17 P-Sport A/S I have right now.

http://www.6mt.net/forum/viewtopic.php?t=13355

Ken

[MikeG356MT]

Thank you Ken for the link and the update. I agree with you as far as tire size goes, more rubber on the road the better!