[jdub486]

My M2C arrives in a few days. So does a set of 763m wheels with no tires. I've read many threads. This will be a weekend car, canyon carver, back roads, maybe a little auto-x. I get a lot of rain in my area and wild temperature variations so I plan to stick the the Michelin PS4s. I probably won't tune past stage 1.

The m2C is clearly under-tired. On my old e92 m3 I ran 255/35 and 275/35 19 inch Michelin PSS which worked well but the m2c has more power and way more torque. The 763m is supposed to save 17lbs compared to the stock m2c wheels, and I don't want to offset all of this with heavy tires.

I am looking for the best balance of grip, weight, and NO rubbing. Suspension will probably stay stock. Here are my options and comparison:

Stock: 245/35 and 265/35=23 and 26 lbs (Not enough meat and dated PSS)

Opt 1: 255/35 and 275/35=24 and 27 lbs (A bit more grip? )

Opt 2: 255/35 and 285/35=24 and 28 lbs (Will the rears rub?)

Opt 3: 265/30 and 285/35=24 and 28 lbs (Too far from stock diameters, but 20mm stagger is good?)

Opt 4: 265/30 and 295/30=24 and 29 lbs (Heavy, too wide in rear, overkill?)

Thoughts and suggestions welcome. Thanks.

[Uncledanny6]

Originally Posted by jdub486

My M2C arrives in a few days. So does a set of 763m wheels with no tires. I've read many threads. This will be a weekend car, canyon carver, back roads, maybe a little auto-x. I get a lot of rain in my area and wild temperature variations so I plan to stick the the Michelin PS4s. I probably won't tune past stage 1.

The m2C is clearly under-tired. On my old e92 m3 I ran 255/35 and 275/35 19 inch Michelin PSS which worked well but the m2c has more power and way more torque. The 763m is supposed to save 17lbs compared to the stock m2c wheels, and I don't want to offset all of this with heavy tires.

I am looking for the best balance of grip, weight, and NO rubbing. Suspension will probably stay stock. Here are my options and comparison:

Stock: 245/35 and 265/35=23 and 26 lbs (Not enough meat and dated PSS)

Opt 1: 255/35 and 275/35=24 and 27 lbs (A bit more grip? )

Opt 2: 255/35 and 285/35=24 and 28 lbs (Will the rears rub?)

Opt 3: 265/30 and 285/35=24 and 28 lbs (Too far from stock diameters, but 20mm stagger is good?)

Opt 4: 265/30 and 295/30=24 and 29 lbs (Heavy, too wide in rear, overkill?)

Thoughts and suggestions welcome. Thanks.

https://jalopnik.com/here-are-the-di...umm-1828555813

[jdub486]

Going to test fit the 788m and pss on my e90 daily. If they don’t fit I may pull off the PSS and burn through them in the m2c.

[jagged]

In the same situation myself...

I’m thinking if option2 might be best solution as I’ve read in another thread that 285 rear will have no issues.

But I’m unsure if option1 seems more balanced since its the stock configuration of the M4.

Hope to see more feedbacks!

[jdub486]

After consulting with Apex wheels and HP Autosport, I decided to go with the 255/35 and 275/35 set up. Both said a 285/35 would work but recommended the 275. If Michelin made a 285/30 in the PS4S I would go with that. In combination with the lighter 763m wheels and the newer PS4S tire I feel a nice improvement in grip, ride quality, noise levels, and turn in.

I think the tire set up depends on how much power you plan to push.

[jv2]

I know this is an old post, but it comes up early in search results, and was influential in my recent tire purchase decision, so I want to post in it for future tire-buyers.

I went with PS4S, 255/35 on the front and 285/35 on the rear.

I think it was a mistake.

They fit fine, and they look great. However the car absolutely does not need more tire for more grip. Making the tire wider doesn't increase the size of the contact patch anyway.

What it did do is increase the tread width relative to the wheel and introduce a small but noticeable amount of tread squirm. It makes the ride feel a little softer and less harsh, but the overall feel in terms of connection to the road is worse.

My next set, I'm going back to the original widths.

[DanG]

Originally Posted by jv2

I know this is an old post, but it comes up early in search results, and was influential in my recent tire purchase decision, so I want to post in it for future tire-buyers.

I went with PS4S, 255/35 on the front and 285/35 on the rear.

I think it was a mistake.

They fit fine, and they look great. However the car absolutely does not need more tire for more grip. Making the tire wider doesn't increase the size of the contact patch anyway.

What it did do is increase the tread width relative to the wheel and introduce a small but noticeable amount of tread squirm. It makes the ride feel a little softer and less harsh, but the overall feel in terms of connection to the road is worse.

My next set, I'm going back to the original widths.

I think your problem is the rear tire size. You should have gone with 275/35/19. The wheels were initially speced for the M3/4. Their stock size was 255/35/19 and 275/35/19.

[chris719]

Originally Posted by DanG

I think your problem is the rear tire size. You should have gone with 275/35/19. The wheels were initially speced for the M3/4. Their stock size was 255/35/19 and 275/35/19.

While this is true, the rear usually doesn't have nearly the impact on steering feel. Going from 245 PSS on the front to 255 PS4S can definitely feel soft because standard PS4S is a softer tire, too.