I have this range of offsets:

FRONT 19x8.5 offsets from -15 to +55
REAR 19x10 offsets from -30 to +75

What is the maximum positive offset to run the widest possible tires for both of those sizes on a sedan?

 

I have no idea, however, it might help to list some details about your ride height. Interesting question.

 

if you're dead set on 8.5/10 setup, there are still many variables like your fender (rolled or pulled), ride height, camber settings that can really change the offset of the wheels.

I'd say, generically, i wouldn't put wider than 255 front and 285 rear on 8.5/10

with that said, assuming you're rolled flat, no pull, at a conservative drop and camber (1.5 drop all around with -1.5 camber), i'd say you shouldnt do lower than +35 front and +40 rear

 

That's not right though. On a 9.5" rim +49 offset with stock camber 295s fit with rolled fenders. So what offset do I need to go to 305s or more? I know it's possible but need to know offset required. It's something higher than +49, like maybe +55.

 

you said 8.5 and 10, where did 9.5 come from?

 

Well 295s are wider than a 10" rim. 295mm is equal to 11.6 inches. So it doesn't matter if the rim is 9.5" or 10" because 295mm is wider than both rims.

I'm guessing 305s fit with a +59 offset. Since 295s with a +49 offset fits, to go to 305s I need to add 10mm to the offset to make it +59.


305mm is 12" wide which means the foot print will be 11" at least the hole entire time I'm driving the car. That's a huge foot print.

Also it seems that the lower the car is the more positive offset I can run to fit wider tires and wheels? The only thing in the way is the strut but it angles toward the middle of the car the higher it goes so that means that if I lower the car I get more clearance for positive offset. I could be wrong.

 

I have a sedan and my spare set up i have is, 8.5+37 245-40-18 and rears are 10+44 with 295-35-18. Runs perfect with no rub. I believe if you run any higher offsets with a full tire mounted on the wheel you will rub on the inside.

 

That's why I need to know how much positive offset I can run.

Can you please tell me exactly how much space you have between the top of the tire and the strut measured in inches? And also, and this more important, the space between the top of the rim and the strut? All of that while the car is on the ground not lifted and measured right in the middle at the top.

This is what it looks like. The lower the car is the more positive offset you can run. The strut angles toward the middle of the car and it's the first thing it could rub against. But also it cant be too low before rubbing above but there is room above as long as the car is not crazy low.

 

I can let you know exactly as soon as i receive my car back from the shop. (^^)

 

Much appreciate it. Just please remember to measure the rim from the inside edge, in the middle, at the top, to the strut. And tire the same way.

I'm guessing that you have very little room between the inside edge of the rim and strut (maybe 1"-2") but room increases as the suspension compresses.

 

For sure. I estimate at most to be 1/2 inch or a little less.

 

Aaron is running +38 on an 11 (possibly a +36 just can't remember)

And I recall him being pretty close to the strut, base your offset off that.

I suggest running a wider wheel if you want to put a 295 or bigger on.

 

But Aaron is running too much negative camber and the tires are stretched. Stock camber at -1.0 to -1.2 is optimal for traction and handling. A 295 or 305 is perfect for a 10" rim as the tire sidewall will protect the rim during cornering as it should.

 

Aaron is running -1.6 and 1 degree of camber is often equal to 7-10mm of offsets difference.

So like 11+4x is what you're looking at.

 

I could risk it and get +59 offset and get a 10mm spacer to push it out if it hits the strut and make the fenders fit the 305s. I might just go ahead and do that. Should be okay.