I have a set of 20" rims that I originally bought for my 92 300zx but I never ended up buying tires, so they have been sitting in my garage and the 300zx is long since sold. I am thinking about putting them on my G35 but the roads where I am from are pretty rough in some places. I was talking to a guy at a tire shop and he said that the tires are going to be so low profile that I am going to be ruining tires every time I hit a decent bump in the road. I need to hear from some people with 20's on this issue so I can decide if I want to buy some tires and mount em up or if I just want to sell the rims. Any of you poeple out there with 20's on your G have trouble ruining tires? Thanks!

 

I just bought 20" ADRs for my G. Its sitting on a stock suspension (non sport package) and i havent had any problems yet (its been 1 month). However, i do feel the ride to be a lot bumpier than before (i had the 17" OEMs). Hope that helps.

I know lots of people who run 20" wheels and they have no problems. I think the tire shop is BSing cuz if you have the right set up (camber, ride height) theres no problems with running 20" rims on our g35s.

Thats my 2 cents correct me if im wrong

ps. theres quite alot of construction where i live - vancouver bc

 

I have 20s and no problem at all. Though there is some relation between tire wear and low profile, the effect is not that significant. You should be more concerned about the amount of drop, therefore camber numbers. This will wear out tires considerably faster. I dropped my car by 1.5" all around and was able to bring everything back to stock alignment spec with some camber kits.

I'm thinking the tireshop meant to say that you will ruin your rims not tires when you hit bumps.

HTH

 

Running 20's for a few years with no issues. Little harsher ride compared to my oem 19's. You do run a greater chance damaging the wheel if you smack potholes real hard though. I've been lucky so far no damage with the ones I've hit. Alignment specs is most important no matter what set-up/wheel dia running concerning tire life.

 

If I do decide to buy some tires, I will get tires that will keep the same overall diameter so that it won't effect my ride height, camber, or any of my 'ometers'. I think I will need 245/30/20 (all 4 rims are 20x8.5, not staggered fitment, and the offset is +32mm). Let me know if I am wrong.

 

I have 20s as well, I do have a staggered fitment.. I LOVE it.. I've dropped my car .6 in the rear and 1" in the front.. Didn't even need a camber kit to bring it back to spec alignment (National Tire and Battery) and it's warrantied for 6 months... I have 245/35/20 in the front on my 8.5 and 285/30/20 on the rear on my 10s... You prolly wanna run the same so you can get some more sidewall on your tires.. It'll also fill up your wheel well more if you're not planning on dropping. I don't think I've ever seen a Coupe w/ all 4 tires the same size before.. Even stock, they're staggered tire fitments, I had 225/45/18 in the front and 245/45/18 in the rear...

 

I bought the rims for another car but they have the same lug pattern and offset to fit the G, so I figured I might want to just use them. Going with the 245/35/20 tires will give me more sidewall but I am not sure that they will be the same overall diameter as the stock wheel and tires, and I want to keep the overall diameter the same. Anyone know the exact tire size to accomplish this with 20's?

 

Tire Rack and think Discount Tire are a good resource with their tire calculators for different wheel size scenarios compared with oem.

 

Much like the OEM 18" coupe wheels and tires. The wheels are all the same width, but the OEM rear 18" tires are larger profile then the front for the staggered setup our coupes are designed to run from the factory... My example is spelled out below:

OEM 18" Coupe wheel Dimensions:
18" x 8" (ALL AROUND)

OEM 18" Tire Dimensions:
225/45/18 (FRONT)
245/45/18 (REAR)

You should try to mirror the same OEM specs when going up in wheel size.

I suggest using the following online calculator in helping you determine which size tires you would need to keep closest to OEM spec.

http://www.miata.net/garage/tirecalc.html

This is all spelled out in another very in depth thread, but I figured I'd point you in the right direction here.

 

I just bought tein 1.5'' lowering springs and after reading this thread was wondering if I would end up needing to get a camber kit?

 

i have 20's now.. and like kin said.. they ride will be a lot harder and u will hear more road noise, but other than that u should be fine... i went from 17's OEM to 20's and no problems

 

Thanks guys. I appreciate all of the info.

 

Get the camber bud.. Biggest mistake I did was install the 20s and lowering kit without the camber.. I was running through rubber every 6 month on decent driving...

 

Hey if you have bad roads then dont go for 20" wheels you will bump the wheels and tires everywhere

 

22s or go home