[Nykrayz]

Originally Posted by mjr24

No worries bud, I’m not either. I wanted to go with different size tires since there are no all season options for those rim sizes and I got scared off by the 1 percent thing. The one percent thing might just be a myth.

this whole tire thing has driven me nuts, there is really no hard evidence that i could find. I generally use caution when not sure

Honestly i got tired of wasting time on this and said F it i am going to try it and be guinea pig and deal with consequences afterwards

Certainly there a few posts on forums where people feel jerking motion or traction sets off with high variance. So far i have not felt that.

[nZtiZia]

Originally Posted by Nykrayz

not what i was trying to say i guess it just came across
apologies

no apologies necessary, mate!

for something like this, you just wanna use the correct value. imagine physicists using the diameter of the moon when calculating the Apollo’s time to travel around the back side of the moon when calculating its burn time to return to Earth. not good!

like you, I’m willing to walk the edge to see the limits of our vehicles. I just hope this isn’t a bad experiment for you. keep us posted…

[tkept149]

Originally Posted by Nykrayz

295 35 21 front
315 30 22 rear

To confirm per your picture, your rears show 295/40ZR22? This is the largest size available for 22s in PSAS4. No issues to date with fitment on OEM wheels?

[Nykrayz]

Originally Posted by tkept149

To confirm per your picture, your rears show 295/40ZR22? This is the largest size available for 22s in PSAS4. No issues to date with fitment on OEM wheels?

I replaced stock with
Front 295 40 21.
Rear. 295 40 22

I have had zero issues since I made switch on stock rims. I put them on as winter tires and drove maybe 3000 or so miles. I just changed back to stock pirellis last week for summer

[bmwarg]

Originally Posted by Nykrayz

I replaced stock with
Front 295 40 21.
Rear. 295 40 22

I have had zero issues since I made switch on stock rims. I put them on as winter tires and drove maybe 3000 or so miles. I just changed back to stock pirellis last week for summer

I like how the tires fill the tire well gap better.

For winter setup I can get same size but up the sidewall from stock: 295/40r21 and 315/35r22. The diameter/circumference difference goes up from 1% to 1.3%. Does this setup sound acceptable?

Could also do 295/35r22 for a -0.7% difference but negative sounds problematic

[georgeo75]

I'm on my 3rd set of tires. Bought a 2020 x5mc with 26k and stock pirelli tires which rode terribly. Got a flat in the right rear and switched out all 4 to Accelera iota in stock size on 818m wheels and did Dinan springs and ride and handling kit.Rode way better and got another 14k before the rears were largely bald, fronts were pretty worn inside. Switched to Toyo STIII, stock front size and 335 25 22 rears. Best combo so far, great ride, better handling than the Accelera. Got all 4 tires for $880.

[Nykrayz]

Originally Posted by bmwarg

I like how the tires fill the tire well gap better.

For winter setup I can get same size but up the sidewall from stock: 295/40r21 and 315/35r22. The diameter/circumference difference goes up from 1% to 1.3%. Does this setup sound acceptable?

Could also do 295/35r22 for a -0.7% difference but negative sounds problematic


I personally think you would be ok with the 1.3% variance. But i am no way an expert. There is so many opinions on proper variance.

From my original post i rocked those tires for about 4 months last year i just traded my x5m for a LCI

It was a short while while maybe i put about 3000 or so miles on them, no transfer case issue.

winter is almost upon us, i still have same tires and will put them on again

[Nykrayz]

Originally Posted by georgeo75

I'm on my 3rd set of tires. Bought a 2020 x5mc with 26k and stock pirelli tires which rode terribly. Got a flat in the right rear and switched out all 4 to Accelera iota in stock size on 818m wheels and did Dinan springs and ride and handling kit.Rode way better and got another 14k before the rears were largely bald, fronts were pretty worn inside. Switched to Toyo STIII, stock front size and 335 25 22 rears. Best combo so far, great ride, better handling than the Accelera. Got all 4 tires for $880.

i had the accelera iota they are ok tires for rain, snow not the greatest

i took off my fairly new pirellis and just put on the iota when i traded the ride last month. i am set for tires for the next 3 years with pirellis and new Michelin on my lci and for winter time mich ps4as

[Alan l.]

Be mindful that having a larger varience from stock Front/Rear Diameter could impact your warranty on the center diff.

It might be ok for a certain time period but fail down the line. I'm starting to see more people post about center diffs failing and the first thing they check is wheel/tire size.