Quote:
Originally Posted by macdude357
It's a balancing act. While the spacer gives you more clearance on the inside, it takes away clearance on the outside.
I can fit the 10.5 Titan7's with 275 tires up front fairly comfortably (depending on tire brand) but I run -3.5* camber and have JRZ RS2 coils which have more clearance than stock.
I currently have my 18x10 ET25 ARC8's on my car with 265/35/18 tires. I have about 15mm of clearance on the outside. A 10.5" wheel would would push the sidewall out another couple of mm, then add another ~10mm on each side for the difference between a 265 and 285 tire and now I'd have about 3mm left. Not enough room for a 5mm spacer and I'm at -3.5* camber.
So, I highly doubt you'll fit a 285 tire up front with < 2* camber regardless of what spacer you run. You are going to start running out of room on the outside.
Best thing for you to do is to mount some tires on your Titan7 wheels, and do some measurements. Or measure your clearance with whatever wheels/tires are on your car now and do some calculations.
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First of all, I think this is academic there's no reason to try and cram a 285/35-18 up front when a 275/35-18 on a 10.5 is going to work just as well as a 285/35 on a 10, and fit better. The wider wheel is more important than a couple mm of extra width or diameter for keeping whatever tire you choose up front happy.
There's room to run a 285/30-18 all day long on a 10.5, so let's be careful about which tire size we're talking about. The 285/35 is a bit tall and wide for a 10.5 I agree, but I think it's doable, if you don't mind some rubbing.
I think the hottest street tire/wheel setup you can get on one of these cars, if NA, is the 285/30-18 RE71R on a 10.5, square. You get a gearing bump, you get the fastest 200tw tire, and you maximize the amount of tire you can get on the car up front where it needs it most. IF you're supercharged that's not a whole lot of rear tire to take all that extra oomph
So... to sum up - take it from me, who has done it, don't bother cramming the 285/35-18 up front, it can be done, it works fine, but why when 275/35-18 and 285/30-18 tires exist?