im picking up my 06 g35x in a few hours....a friend of mine told me he would sell me his rims for real cheap, just to get rid of them. 19' HP lightning silver rims, 5x114.3...19 x 8.5 38 offset with 235/55/19 tires. Sorry for the newb question, i did a search and couldnt find anyone running these tires so I assume they are no good. Any feedback is greatly appreciated!

 

I think you're safe with those rims & offset; however, not sure about the wheels...I don't have my calculator to convert mm to inches, but I believe those tires w/ 19" rims may put you way over OEM diameter.

I'm running 245/40/19's on 19" wheels, and I'm slightly larger than OEM diameter, but it works, as it's within 2%. 245/40 tires have a wheel sidewall height of 98 mm and 235/55 tires have a height of 129 mm. My quick math puts that at a 3 centimeter difference (and that's just one side, so you'd have to multiply by two (2), giving you a total diameter of 6 cm bigger than OEM...now that I say that, you sure 235/55 isn't a typo? Those are like SUV tires!

Let me know.

 

your right...215/35 is the right size

 

245/35/19 all around.

 

215/35/19 is way under the oem diameter.

 

Yea, you definetly need a lower profile tire.

 

Actually you are running smaller than the overall OEM diameter. Your total diameter is 678.60 mm and the stock diameter is 689.80. You need to factor in the diameter of the wheels as well as the tire sidewall. For those that want to go through the calcs, 1 inch = 25.4 mm.

For the example above, a 245/40/19 would amount to this:

245 X.4 = 98mm

(98X2) + (25.4 X 19) = 678.60mm

 

This is a great one:

LINK

 

245/40/19 no rubbing and a great ride

 

ok 245/40/19 seems to be the best all around..guess i need a different rim and offset. whats the best offset for this car? thanks again! by the way, PICKED UP MY CAR THIS AFTERNOON!!! tty guys soon!!!

 

Congrats!!!

Yeah I think I would have 245/40's and 275/35's if I had 19's.

 

i have a 19x8 wheel, a +45 offset with 245/20/19 with no problems

 

Are you sure? I'm not challenging that you're right or wrong, but just want to make sure I'm calculating it right. I think there may be an error in your stock diameter calculation. Here's my math:

STOCK 215/55/17 yields 118.25mm sidewall = 4.66 in. = 26.3 in total
AFTER 245/40/19 = 98mm = 3.86 in. = 26.72 total

or in Metric like you have it:

STOCK 215/55/17 yields 118.25mm sidewall, therefore (118.25 x 2) + (17 x 25.4) = 668.30 mm diameter

AFTER 245/40/19 = 98mm sidewall, therefore (98 x 2) + (19 x 25.4) = 678.60 mm diameter

 

wtf?? 245/20/19?? do they even make tires in that size???

 

haha WOOPS meant to say 40....that would be pretty gangster with a 20 profile tho haha