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[Turbod]

So I had one of my stock runflats blow out on me after 20,000 miles and just ordered some new Michelin Pilot Super Sports. I have been reading the forms all day and now I am concerned that my rear tire may be too tall.

What I ordered
Front - 235/40/r19
Rear - 265/35/r19

What I have
Front - 225/35/r19
Rear - 255/30/r19

My car is a 2011 335i LCI E92 with stock suspension on the style 230.

Style 230's
Front - 19x8 ET 37
Rear - 19x9 ET 39

My goal was to keep the stock rims and get a little more tire to have a softer ride, fill a little bit of the wheel gap, and make the speedometer a little more accurate. I think that I should be fine as far as width is concerned but I don't know if gaining about half an inch in tire will be too tall. Does anyone know if these will rub the wheel well?

According to http://www.willtheyfit.com/index.php? I will gain 16.25 mm in tire height which is 0.64 inches.

Some photos of the tire that let go and current vehicle stance.

[Twin_Snails]

I think you'll be fine as long as you aren't lowered and don't have any spacers.

[Turbod]

Well I guess I'll find out. Install is set for next Wednesday.

[Turbod]

Well I think I am going to try and cancel my current order and go with 235/35/r19 and 265/30/r19 because I know those sizes will work.

[VMRWheels]

Probably better to go with the 35/30 profiles rather than 40/35 for 19s. It probably wouldn't cause any serious issues since you're on stock suspension but it would mess with your speedo and odometer.

[Turbod]

Originally Posted by VMRWheels

Probably better to go with the 35/30 profiles rather than 40/35 for 19s. It probably wouldn't cause any serious issues since you're on stock suspension but it would mess with your speedo and odometer.

Thanks for the feedback. I think going with a larger diameter would actually dial the speedometer in more since it already shows higher than actual speeds. After looking at my car more closely I think it could work but I would probably need a spacer in the front and more negative camber in the rear.

We'll see what the tire shop says since I already placed my order.

[Alen E90]

It's funny, I'm in the same position as you are at the moment. I've also placed an order for tires for my 230's but the tire specs that I went with are 235/35 and 265/35. This way I will have the same amount of sidewall all around. As for a 235/40 in the front, I had kept going back and forth about this but I beleive that a 40 sidewall will rub even with stock suspension.

[Fundguy1]

Originally Posted by Turbod

Well I think I am going to try and cancel my current order and go with 235/35/r19 and 265/30/r19 because I know those sizes will work.

+1. These sizes will make your speedo almost perfect. Your ordered sizes will make it slower than you are going instead of faster like it was stock. Too much sidewall.

[Fundguy1]

Originally Posted by Alen E90

It's funny, I'm in the same position as you are at the moment. I've also placed an order for tires for my 230's but the tire specs that I went with are 235/35 and 265/35. This way I will have the same amount of sidewall all around. As for a 235/40 in the front, I had kept going back and forth about this but I beleive that a 40 sidewall will rub even with stock suspension.

Another person who doesn't understand tire sizing. Your rears will have more sidewall. 35 is a ratio, not a measurement. Your front sidewalls will be 235/35= 82.25 mm. Or 3 1/4". Your rears will be 265/35= 92.75mm or 3.66". Your rears will be almost an inch taller than your fronts. If you ordered 265/30-19 you'd have more equal sizes. Those will have 3 1/8" sidewalls or 1/4" shorter tires. 235/40-19 will have the same diameter as your 265/35-19 rears. They'll be 26.4" stock is about 25.1.

25.7" is about perfect speedo. Mine are 25.6".

[Alen E90]

Originally Posted by Fundguy1

Another person who doesn't understand tire sizing. Your rears will have more sidewall. 35 is a ratio, not a measurement. Your front sidewalls will be 235/35= 82.25 mm. Or 3 1/4". Your rears will be 265/35= 92.75mm or 3.66". Your rears will be almost an inch taller than your fronts. If you ordered 265/30-19 you'd have more equal sizes. Those will have 3 1/8" sidewalls or 1/4" shorter tires. 235/40-19 will have the same diameter as your 265/35-19 rears. They'll be 26.4" stock is about 25.1.

25.7" is about perfect speedo. Mine are 25.6".

Yes I agree with you that if I was to go with a 265/30 in the rear I would have more equal sizes, but the only problem would be that I would have less sidewall in the rear and that is what I'm avoiding cause I want the rear wheels to have more meat.

[Fundguy1]

Originally Posted by Alen E90

Yes I agree with you that if I was to go with a 265/30 in the rear I would have more equal sizes, but the only problem would be that I would have less sidewall in the rear and that is what I'm avoiding cause I want the rear wheels to have more meat.

Sidewall on the 265/30-19 will be the same as sidewall on the 235/35-19. Sidewall on a 265/35-19 will be MUCH bigger. Didn't you read how it's calculated? The big problem you are going to have is they may be so much bigger they throw off the traction control and shut down your car. They need to be within a few percent of each other front to back or the car doesn't like it. I think it's 5% difference max it will allow. More and it thinks you're skidding etc. You want meat get 275/30-19 like me instead.

[Alen E90]

Originally Posted by Fundguy1

Sidewall on the 265/30-19 will be the same as sidewall on the 235/35-19. Sidewall on a 265/35-19 will be MUCH bigger. Didn't you read how it's calculated? The big problem you are going to have is they may be so much bigger they throw off the traction control and shut down your car. They need to be within a few percent of each other front to back or the car doesn't like it. I think it's 5% difference max it will allow. More and it thinks you're skidding etc. You want meat get 275/30-19 like me instead.

Everyone that has had these 230's have said that their rears have cracked on a 30 sidewall, so that is the reason why I decided to get 35 for the rear. Also, how would a 265/35 in the rear have a taller sidewall than the fronts if the fronts are also on a 35 sidewall?

[vespa]

"35" means 35% of 265mm.

I have the same car/wheels and just put 265/30/19 PSS's on the rear and they fit perfectly. Plenty of sidewall and no ghetto look.

[Alen E90]

Originally Posted by vespa

"35" means 35% of 265mm.

I have the same car/wheels and just put 265/30/19 PSS's on the rear and they fit perfectly. Plenty of sidewall and no ghetto look.

I know that 265/30 looks really good but I just hate how the sidewall is not a 35 or higher. Lots of people have had problems with their 230's when they were on 265/30's.

[Turbod]

Originally Posted by Fundguy1

I think it's 5% difference max it will allow. More and it thinks you're skidding etc.

Everything I have read said to keep it within 1%.

[snedanator]

I have 255 35 19 with no problems...with 245 35 19 in front. Same offsets as you. Speedo is near perfect..

[Turbod]

Well I went back to the local shop and change my order to the 235/35/19 and 265/30/19. The tires were cheaper but there was a restocking fee so it was about a wash.

[Turbod]

I had the 235/35/19 & 265/30/19 installed today and they are great tires. I now have traction again in second gear. So far I have only ran 16 psi in second so I don't know if they will hold 18+ yet. As for fitment they are much better than the stock wheels. I think if I were to buy spacers I could run into issues with rubbing which I would rather just avoid.

If you were considering the tires in the original post I would say stick with the 225 and 255 if you are planning to go with a higher aspect ratio. If not, these sizes work just fine. There is a little bit of room for spacers if you want to have a more aggressive stance.

[Fundguy1]

Originally Posted by Alen E90

I know that 265/30 looks really good but I just hate how the sidewall is not a 35 or higher. Lots of people have had problems with their 230's when they were on 265/30's.

AGAIN YOU AREN'T READING WHAT WE ARE SAYING!!! 35 sidewall isn't a dimension like 3.5". It is a percentage of the treadwidth. If a 205 tire has a 30 sidewall, the sidewall is 62mm high. If a 305 tire has a 30 sidewall, the sidewall is 92mm high. Using the same sidewall numbers with different treadwidth tires me and automatically different size sidewalls. A 265/30 tire has basically the same height sidewall as a 235/35 sidewall. If you use a 265/35 tire with a 235/35 front you will achieve the hopped up rear look of a 60s muscle car. READ!!!!!!