I have the G37s wheels and it is time to replace front tires. i am contemplating if i should purchase 225 or 245. Anyone has 245 on front? How does it handle?

The 225 that i have on right now feel really 'heavy' when turning, so I am concern if i put 245 on, it'll be even worst. Comments?

 

In my opinion, you just don't change stuff for the hell of it. If you have a plan for putting + 20 mm tires on all four corners, go for it. But if you replace the fronts now and you have no plan for doing the back end (quickly in case your VDC starts applying the brakes), then you deserve what you get.

 

I would assume that putting 245's in the front will give you more of that "heavy feel" as you have more rubber to get around the corners. I personally don't like to stray from what the factory suggests as far as tire specs. I know many members have played with it with successful results but I guess I am just overly cautious about it.

 

I agree. I don't get how people feel comfortable or confident that they can just modify some factory spec randomly and think they can achieve a better result or even mach the performance of the original factory spec. Nissan has invested a lot of time/money in fine tuning the Gs handling characteristics, and there is reason and R&D work to back up the final set-up- something the average novice cannot match. Nissan went in a more uncommon path with the tire wheel selection for the G sport, using an odd tire size combo with narrower tire up front with a higher aspect ratio, which totally goes against keeping things simple, convenient and inexpensive to maintain (not being able to rotate tires), for a reason- to optomize performance.

This is just my mindset when it comes to modifying my near $40K car. I think we should keep this in mind before we make hasty decisions on how we modify our cars. Just my $.02

 

The OEM wheelson the G35S are staggered, meaning 18x7.5 fronts and 18x8.5 rears. I wouldn't recommend running the same size tire on different wheel widths. You'd be better off getting the same size wheels and tires on all four corners. The added benefit is the ability to rotate your wheels/tires. This can greatly improve your tire longevity 1.5x to 2.0x with proper inflation.

I'm running 18x8.5 wheels with 245/45r18 tires on all four corners without any problems or spacers. The steering may feel a little heavy at first but you get use to it quickly. It may just be the new tread causing a little more resistance. No trouble with VDC either, the system only reacts to wheel spin.

Good Luck

 

I haven't had any problems running 245 in front and 285 in the rear with aftermarket wheels. Just be certain the outside diameter of the tire is close to factory spec.

I also prefer to use a tire width that is matched to the wheel width. That said, I would use the tire width that Infiniti recommends for the stock G37 wheel.

 

got it you guys. Thanks for the advise! I'll stick with 225 for the front then; Infiniti recommended.

 

I have had this setup (rear rims all around and 245 tires all around) for more than two years now on my 6mt g35S and I like it more than the stock setup. I dont get any tramlining or heavy feel. Steering response is as stock and the advantage is being able to rotate the tires and more tire choices. No rubbing or grinding at all, on impact on MPG or noise.

Jpr

 

look into 235 for the front. this is much more managable. 245 in front is overkill

 

more tread on the front also equal better braking. especially since our stock S brakes can easily lock up (or in this case activate ABS) under heavy braking.

 

When I have to replace the rubber on my 37s 19's I going with 245/40's up front and 275/35's in the back. There are a lot of people running that size with no issues.

 

Original factory spec is not always optimized for performance. There's always a trade off between performance, comfort, price, etc... Original factory spec is what Nissan feels is the right balance for the marketplace. Oftentimes, it's not the right balance for us enthusiasts.

 

very true ^

 

stick with the 225's... I have tried the 245's and believe me it will not give you the same performance.. (as I experienced).

 

You can go as fat as you want as long as you keep the same "rolling" diameter. That's what I did. I went from 235 45 18"s to 245 40 19"s and the bigger tires have the exact same diameter as the originals. That way my speedo is the same also, but it looks and handles much better. I did just go up one size on the factory rims with my first tire change. I went from 235's to 245's and never had a problem with the VDC.