Really, what happened to that thread? I can't find it anymore

Anyway, there are quite a few people using oversized tires on their Max. I am asking you guys, could you please provide some more data?

1. What is exactly the size of your tire (including section width, tread width, revs per mile).
2. Do you notice any unusual treadwear?
3. What about your cornering ability (increased/decreased)?
4. Any measurable (>1 psi/week) air bleeding?
5. (Too early, but could happen) Do you feel tire needs re-balancing after a while?

For all you fighters: I KNOW IT MIGHT/MIGHT NOT (pick appropriate) BE SAFE TO DRIVE WITH LARGER TIRES SO PLEASE SPARE YOUR FLAMES FOR OTHER FORUMS. I WOULD REALLY APPRECIATE SOME CONSTRUCTIVE DATA INSTEAD OF PURE EMOTIONS.

Thank you

They don't. Case closed.

Correction:

They fit on a 17x7, but the answer is are they safe? Probably not. If the tire manufacture doesn't recommend it, then its not safe. But doesn't mean we will stop you or anyone else from using them. There are a few here who have them, which haven't noticed any issues (YET). But I would recommend going 235x45 not 245 to be on the safe side if you need to go wider.

Here we go again!

There are no tires manufactured in sizes 235/45R17 or 245/45R17 that are approved for use on 7.0" wide rims. Manufacturer specifications that indicate otherwise are a misprint. The minimum approved rim width for those tire sizes is 7.5". Don't believe me? Contact the United States Tire and Rim Association (T & RA). They can be reached at 330-666-8121.

hey,

can someone post the little program that calculates the differences in speedo and odometer readings when changing tire or rim sizes?

thanks

What do people think of 225/45/17?? I know kumho makes a tire this size for like a 100 bucks and my friend works at discount tire so thats probably what i will get.. Wont i get better acceleration and handling with the smaller tire?? But my speedo will be off a tiny bit and ride might be a tad more harsh., right? How wide of a tire would i have to get to keep the sidewall size 50??

Adam

Still is : www.5thgenmaxima.com

jack

Well, let me seem to get this through your head. You just repeated WHAT I SAID. I put it in nice terms and leave it up to there decision what they would like to do. You said flat out it won't work when it will. So you were wrong. If you said it the way I did, then you will let the other person make the decision and make them understand its really there choice if they want to be unsafe not yours.

Nothing starting again. You just love pushing that info into peoples faces...maybe you need to stop.

This time I am not recommending it. I just basically said, it fits, but its not safe.

This is all Nissan's fault for choosing a size spec for 5th gens that is nearly impossible to find... just pointing that out. How many tires are made in 225/50/17, like 3? I only know of Nitto, Michelin Pilots ($$$$$), and the crappy Bridgestones.

Fair enough, Russ. Let's leave it at that.

Other than speedo error, the only thing I've heard about running a tire that doesn't maintain the proper geometry is that it may adversely affect the Antilock Braking System (ABS). What that effect might be is a mystery to me. I haven't seen anything in writing that has a bearing on it other than the following statement:

"The antilock brake system is speed sensitive, and will not activate at very slow speeds." [Slow is defined as under 10 mph.]

[Source: http://www.nhtsa.dot.gov/cars/proble...ABSBRAKES.html.]

Nevertheless, I do think that it's important to remain as close as possible to the OEM tire geometry. And I've seen at least one tire manufacturer (Dunlop) claim that it's not a good idea to exceed the OEM geometry by more than 3.0%.

Unfortunately, changing from a 225/50R17 tire to 225/45R17 tire changes the geometry by 3.42%. Whether you consider that excessive is up to you.

The best upsize match for the 225/50R17 is the 245/45R17. But as we've discussed ad nauseum in this and other threads, to mount a tire of that size safely, you'll need to purchase a set of rims with a width of at least 7.5".

Last but not least, selecting a 235/45R17 to replace your stock 225/50R17s doesn't make a great deal of sense. Although 235/45R17s are a very popular upsize, they cannot be mounted safely on our stock rims. And if you elect to purchase wider rims, the 245/45R17 tire size becomes an option. The selection in 245/45R17 tires is just as broad as the selection in 235/45R17, the speedo error is less, and the price delta between the two tire sizes is extremely narrow. Thus, regardless of protests to the contrary, there appears to be no good reason to select the 235/45R17 as a replacement for the 225/50R17.

Check out Pirreli's site they have a section that shows what tire fits on what wheel... 245 is truly safely ment for 8" -9.5 wide wheels. They will fit 7.5 -10 but it's not a good idea.

There it is: http://www.miata.net/garage/tirecalc.html