Thread: Need advice on agx's and tire size

I currently have my ser on b14 wheels with 195/55 15 i want to buy some tires but ive had the problem when i ran 205 55 15 it was rubbing on my agx's. I am buying some dunlops but i dont want to buy 205 50 15 because i feel as if i will have too much wheel gap between the fender and tire.

My question is whats the biggest size tire i could run without rubbing if i buy a 5 mm spacer? just to be clear i dont want that hellaflush look or stance i simply want to buy a chubby tire.

also a local guy is selling some enkie rs's for $575 they are 15x8 +25 i love those wheels but if i buy these wheels are they going to pop out of my fenders? i have a fender roller available but i dont want to go that route.

thanks,manny

First off
15x8 with that offset wont work...it will rub your agx'es even more. If you look in my sig I'm running a 15x8 but they are 15mm offset...and they rub the rear fenders of my NX if I push the car too hard.
Second, 5mm in my opinion is not a huge amount that would cause a huge gap. If you were happy with the 205-55's then go with the 205 -50's. That's kinda the go-to size for a 15" tire for se-r's.
Stay away from the spacer unless you absolutely need it.
I take it you are running traditional-sized springs...because if you weren't, and had coilovers, you could grind away the area of the AGX that was rubbing.

Agreed. I would run 205-50-15s and space out accordingly if it still rubs the spring perch.
Also, the second number in the tire size is a percentage, not a measurement in millimeters.

It isn't a percentage, it is a ratio.

In the research I have done, the "50" in standard US tire code means that the sidewall is 50% of the entire width of the tire at it's widest point. You could certainly calculate the ratio based on that info but I think it is best described as a percentage of width.

I can be referred to as the "Sidewall aspect ratio" but the ratio is represented our of 100 not the number representing mm of width. When ratio's are out of 100 I personally refer to them as percentages (ie. per cent) meaning per 100.

Copied from Wikipedia:

Examples
The tires on a BMW Mini Cooper might be labeled: P195/55R16 85H
P — these tires are for a passenger vehicle. However 'P' denotes P metric size load and speed rating changes for P tire & non-P tires.
195 — the nominal width of the tire is approximately 195 mm at the widest point
55 — indicates that the height of the sidewall of the tire is 55% of the width (107 mm)
R — this is a radial tire
16 — this tire fits 16 in (410 mm) wheels
85 — the load index, a maximum of 515 kg (1,140 lb) per tire in this case
H — the speed index, this means the maximum permitted speed, here 210 km/h (130 mph).

Other sources corroborate.

You learned me good. Why did I never know that? Here's basically why: Tire Section Width - Sidewall Aspect Ratio

It is called an aspect ratio, and it is a ratio... It is also a percentage... =/

Yeah I realized that was what you were referring to and edited my post accordingly.

The ratio is out of 100 so its confusing. Ratio's to 100 and percentages are by definition interchangeable.

Yah... I was being a total idiot. I wish I'd found better explanations of it 10 years ago when I was doing my research. =(

The thing is I can probably. Fit 205/50 15 but 205/55 15 will rub I'm buying tires today. A 5 mm spacer isn't much if I run a 10mm spacer what would be the widest tire I can run?

Wheel wells can fluctuate in mm from car to car. It is almost impossible for us to answer your question with any reasonable level of certainty.

That being said, you shouldn't run a 5 or 10 mm spacer unless you need it to clear the spring perch.
The only benefit you will be getting (real word) from spacing a few millimeters is fitment. Spacers should be used to make something fit. You shouldn't fit something to the car just to use the spacers.