[V8MAN]

Hey guys,

For those that have gone the 265/40/21 fronts and 295/35/21 rears route, what tire pressure are you using?
Just got this done yesterday but I am not sure where I should take the pressure to.

[X3MCRN]

Originally Posted by V8MAN

Hey guys,

For those that have gone the 265/40/21 fronts and 295/35/21 rears route, what tire pressure are you using?
Just got this done yesterday but I am not sure where I should take the pressure to.

I literally posted the same thing last night. I'm just signing in to see responses.

[V8MAN]

LOL, I will delete this, but looks like 38 all around is fair....I usually like to run 2 over anyway.

Originally Posted by X3MCRN

I literally posted the same thing last night. I'm just signing in to see responses.

[spta97]

I run much higher pressures on my OEM 2020 wheels/tires. 39F/46R.

I think the manual calls for this for speeds over 100 MPH - there is a chart but def staggered pressures.

[kyleb350]

Going to a slightly larger width shouldn't require any difference in psi, all else being equal.

Originally Posted by spta97

I run much higher pressures on my OEM 2020 wheels/tires. 39F/46R.

I think the manual calls for this for speeds over 100 MPH - there is a chart but def staggered pressures.

I think you're right. I changed my tire settings for the first time yesterday from <100 mph to >100 mph just to see what was different, and my low tire pressure warning came on. I confirmed I was at 34 psi on the fronts and 37 psi on the rears, and I thought it might be due to the higher speeds needing higher psi.

[spta97]

Originally Posted by kyleb350

Going to a slightly larger width shouldn't require any difference in psi, all else being equal.



I think you're right. I changed my tire settings for the first time yesterday from <100 mph to >100 mph just to see what was different, and my low tire pressure warning came on. I confirmed I was at 34 psi on the fronts and 37 psi on the rears, and I thought it might be due to the higher speeds needing higher psi.

That’s exactly why BMW calls for the higher pressure.

I’m imagining that the tires could heat up too much at high speeds for long periods of time. That and increased handling.

I don’t always drive over 100, but it’s nice to know I’m in spec when I do. Down side is a rougher ride 99% of the time lol.

[X3MCRN]

Originally Posted by kyleb350

Going to a slightly larger width shouldn't require any difference in psi, all else being equal.

I think you're right. I changed my tire settings for the first time yesterday from <100 mph to >100 mph just to see what was different, and my low tire pressure warning came on. I confirmed I was at 34 psi on the fronts and 37 psi on the rears, and I thought it might be due to the higher speeds needing higher psi.

What do you mean "changed your tire settings?"

[pluckydks]

Originally Posted by spta97

That’s exactly why BMW calls for the higher pressure.

I’m imagining that the tires could heat up too much at high speeds for long periods of time. That and increased handling.

I don’t always drive over 100, but it’s nice to know I’m in spec when I do. Down side is a rougher ride 99% of the time lol.

I put the average that the car tells me for <100 and >100, so it might help a bit with the rougher ride

[kyleb350]

Originally Posted by X3MCRN

What do you mean "changed your tire settings?"

If you go to the Tire Pressure menu, there is a submenu for tire settings. There's a preset for summer and winter tires. If you have non-stock sizes, it looks like you can change that there too.