Apparently (haven't checked for myself) Mr Musk recommends decreasing the tyre pressures if you want to optimise comfort over consumption (good use of alliteration there
).
I was going to try it anyway so I dropped the pressures to 40psi. I find dropping the pressures tricky as all I can do is let air out then check the pressures, then do it again, etc etc.
Anyway I ended up at 39psi cold which translated into 41-42psi on a run.
The ride is noticeably better. I am probably imagining it, but it feels to me as though the springs, dampers, tyres and seats are working better as a system when you take away the short sharp jabs the hard tyres throw at the suspension.
I'm on the stock Hancook 19" 45 sidewall tyres. They have very soft sidewalls as I know from have a puncture, when the weight of the car settled on a flat tyre there is no sidewall to speak of, so it is the air pressure that provides the strength, not the rubber. I take that to mean that they are sensitive to tyre pressure.
PS - I have seen a few mentions of improving the ride by changing from run flats. The Model Y does not have run flats.
On the same forum as the suggestion to decrease the tyre pressure a little there were also suggestions to change to tyres with bigger sidewalls, from 45 to 50 on the standard 19" wheel, or to 55 on an 18" wheel. It suggested the M3 18" wheels fit.
I no longer feel the need to change the car or to modify the suspension, its good enough now.
PPS - to the degree you can tell (given differing conditions) over an 80 mile motorway journey the change in tyre pressure had no big hit on range.
I was going to try it anyway so I dropped the pressures to 40psi. I find dropping the pressures tricky as all I can do is let air out then check the pressures, then do it again, etc etc.
Anyway I ended up at 39psi cold which translated into 41-42psi on a run.
The ride is noticeably better. I am probably imagining it, but it feels to me as though the springs, dampers, tyres and seats are working better as a system when you take away the short sharp jabs the hard tyres throw at the suspension.
I'm on the stock Hancook 19" 45 sidewall tyres. They have very soft sidewalls as I know from have a puncture, when the weight of the car settled on a flat tyre there is no sidewall to speak of, so it is the air pressure that provides the strength, not the rubber. I take that to mean that they are sensitive to tyre pressure.
PS - I have seen a few mentions of improving the ride by changing from run flats. The Model Y does not have run flats.
On the same forum as the suggestion to decrease the tyre pressure a little there were also suggestions to change to tyres with bigger sidewalls, from 45 to 50 on the standard 19" wheel, or to 55 on an 18" wheel. It suggested the M3 18" wheels fit.
I no longer feel the need to change the car or to modify the suspension, its good enough now.
PPS - to the degree you can tell (given differing conditions) over an 80 mile motorway journey the change in tyre pressure had no big hit on range.