Quote:
Originally Posted by VisualEcho
1. Deals were made for specific tires for this platform.
2. If you think you're guaranteed to get the power to the ground better with a bigger, heavier tire, you're wrong. If you want to get the power down better, lower the pressure, and/or choose a different tire.
3. The 245/265 combo gives the best overall performance for the car, all things considered. Bigger isn't always better.
4. The correct larger size for the car would be 265/30 & 285/30, and the PSS isn't made in 265/30.
5. Tires are cheap, buy bigger ones and figure out what BMW already knows...
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Dedicated thread about M2/M2C tire size increase:
here.
See also this overview by forum fellow
mToronto:
My former M2 and current M2C setup: Michelin PS4S | 255/35 R19 (F) | 275/35 R19 (R) (
i.e. 1 size up):
Quote:
Originally Posted by Artemis
It's all kinda subjective. I upscaled PSS to PS4S in 2017. Especially wet-handling got improved (improved safety too). When I upscaled PS4S 1 size in 2019 (from 245/35 R19 + 265/35 R19 to 255/35 R19 + 275/35 R19), I also upscaled from 437M to 763M wheels. That complicates (subjective) comparisons.
But here's what I can say: especially once up to temp, DSC nannies are quieter than ever (especially when accelerating out of hairpins) and the set gets you a fraction more grip. Turn-in improved, but for sure the credit for that mainly belongs to 763M (reduced unsprung weight / rotational mass).
As regards technical control of vehicles: upscaling from 245/265 to 255/275 stays within the 'tolerances' band, and, hence, gets a pass over here.
In my book (city + highway + mountain driving), 255/275 PS4S + 763M wins.
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A couple of videos about the PS4S tires:
- PSS vs PS4S (2017): here
- PS4S vs Cup2 (2018): here
- PS4 vs PS4S vs Cup2 (2018): here
- PS4S vs Continental SportContact 6 vs Eagle F1 SuperSport (2019): here
Do wider tyres give you more grip ? (conclusion: from 09:41 onwards):