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[noremaC]

Originally Posted by SoCalRPM

So what tire pressures are everyone running on 255/35 front and 275/35 MP4S?

AFAIK, I've been running the stock 33F/34R cold pressures. If there is something more optimal, I'm open to hearing the benefits. This is strictly for street-use. I need a pancake compressor at home so I can actually get an accurate cold reading. Driving to the gas station, even if just a mile, warms the tire.

[SoCalRPM]

Originally Posted by noremaC

I need a pancake compressor at home so I can actually get an accurate cold reading. Driving to the gas station, even if just a mile, warms the tire.

I've been looking into portable compressors like the Milwaukee M12 or the new Rigid Inflator as a mobile alternative. I tried the EPAuto 12v but it was junk.

[Bubbles]

Finding available MP4S in the 255/275 size is always a PIA. It’s always a piecemeal process from 2-3 distributors for full msrp. Supply is tedious, in hindsight I would have gone with squared 18 set up for pricing and availability.

[Scharbag]

Originally Posted by SoCalRPM

So what tire pressures are everyone running on 255/35 front and 275/35 MP4S?

I run 36F 37R with 255/275

With 275/30/19 square I run 37 on all 4.

[mapster37]

im running 255/275 MPS4s w/ hr springs, no spacers, no rubbing here

[SilverSlug]

Why do 90% of people upsize to 255/275?

I'd like to upgrade to 4S, and run OEM sizes (245/265), but also comfort is a top priority…

Will the upsized tires be noticeably more comfortable on horrendous inner city roads?

[ES BMW]

You'll get a tad bit more sidewall to absorb bumps in the road. Upgraded to 255/275 Conti Extremecontact Sport and like the extra bit of dampening. Great grip too, just make sure you get an alignment.