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Discussion Starter · #1 ·
I believe this is correct (my offsets may be wrong)

STOCK 20s (what I have now):

235 35Z R20 8x20 et 57
265 35Z R20 9.5x20 et 45


STOCK 19s (if I had bought 19 stock)
235 40Z R20 8x19 et 57
265 40Z R20 9.5x19 et 45

I'm looking at dropping from 20's to 19's and getting new OZ Leggera wheels ... actually already ordered but after some discussion with friends wanted to post a Q before they get inventory and my order goes thru.

I'm current PLANNING
245 35Z R19 8.5x19 et 53
285 35 Z R19 10x19 et 40

However a friend was also thinking fronts might work better as 245/40/19 because it will match the original diameter closer. However that would make the front larger, back smaller and the car would sit flatter vs the normal 3.1-3.6% front to back downwards slant.

Thoughts? I've currently got 7/14mm spacers on my 20s I will remove and leave off with my new setup.

thanks
Comet



 

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Discussion Starter · #2 ·
BTW I've read that some run the fronts with the 255/35/19

This seems like it would be the best option to keep closer front diameters and front to back slant. But.... I have also read one thread where someone felt that those had very slight rubbing. So I am not sure what to believe...

thanks
comet
 

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Discussion Starter · #3 ·
Hey figured I'd post a follow up as I am sure others might search this thread later and want some info.

After more research ... First my original PLAN of 245/35/19 would work however there are two issues. First the delta in diameter is pretty big from stock on the front 2.5% not ideal. In addition the front to back rake then becomes 4.1% so more slanted down than the stock 3.6% on 19s.

I then looked at 255/35/19 with the 285/35/19 plan.. this bring the front diameters closer, tire is only 1.4% smaller however after some helpful PM's from other members there is rubbing on front suspension unless you get the proper offset wheels or spacers. Which I am trying to avoid now.

At the end of the day I've decided to go back to the 40-ratio and just go 10mm wider than stock... so I am going 245/40/19 front and 275/40/19 rears. This should let me get slightly wider, remove my current spacers from my stock 20" wheels I have and keep the look fairly similar. Wheels will be about the same front to back sizes as stock so same tilt and only a percent or so larger than stock.

Thanks to Jim at Tire Rack for helping to confirm this as well.

-comet
 

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I also went 245/275 on stock 19s. No issues with fit or mounting. I'm thinking about 5-10mm spacers to make the wheel well gap look smaller (standard suspension) but I'm concerned about pitting on the quarter panels (no film there).
 
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