Changing tyre pressure to psi

[redwood98]

I know there is a lack of a way to change the way the tyre pressure is measured on an mg4 but has anyone found a way? Mine is kpa and I know others are measured differently so surely there is some way to do it, maybe in the hidden settings behind the passcode?

 

[siteguru]

Nobody knows, to my knowledge. If yours is in kPa then at least it means you have a touch more granularity than those of us restricted to bar ... yours will show changes in 4 kPa increments whereas ours will only show in 0.1 bar increments. (0.1 bar = 10 kPa)

 

[Scotsman]

Hi try this if you go onto your centre screen and side scroll and it will show how to set the time etc scroll down and it has the function to change tyre pressures to psi bar or kpa , that's how it's done on my new zs hybrid. hopefully the same for you .

 

[redwood98]

Nobody knows, to my knowledge. If yours is in kPa then at least it means you have a touch more granularity than those of us restricted to bar ... yours will show changes in 4 kPa increments whereas ours will only show in 0.1 bar increments. (0.1 bar = 10 kPa)

other than knowing my car needs 250 I know nothing else about kpa though

 

[ReintjeWA]

other than knowing my car needs 250 I know nothing else about kpa though

250 kPa = 2.5 bar. So it’s easy to read between the two, but it takes more mental math to get psi. For the MG4 though I would say the most important thing to remember is that the TPMS threshold appears to be around 2.4 bar, so if you run 2.5 you may start getting warnings on cold mornings.

A lot of people run more than 2.5 to stop this issue from happening. I normally top up to 2.8 bar (roughly 40 psi) and the pressures increase to 3.0 while driving as the tyres heat up. The highest they’ve gotten while driving is 3.1, which equates to about a 5 psi difference. That is pretty much the limit for pressure difference between cold and warm tyres, more than 5 psi is a strong indication you are under inflated and the tyre is flexing too much (hence more heat hence more pressure difference)

It’s possible your pressures don’t increase by more than 5 psi as well, but I prefer running a harder tyre regardless, so I don’t know if 2.5 bar heats up too much or not.

 

[redwood98]

250 kPa = 2.5 bar. So it’s easy to read between the two, but it takes more mental math to get psi. For the MG4 though I would say the most important thing to remember is that the TPMS threshold appears to be around 2.4 bar, so if you run 2.5 you may start getting warnings on cold mornings.

A lot of people run more than 2.5 to stop this issue from happening. I normally top up to 2.8 bar (roughly 40 psi) and the pressures increase to 3.0 while driving as the tyres heat up. The highest they’ve gotten while driving is 3.1, which equates to about a 5 psi difference. That is pretty much the limit for pressure difference between cold and warm tyres, more than 5 psi is a strong indication you are under inflated and the tyre is flexing too much (hence more heat hence more pressure difference)

It’s possible your pressures don’t increase by more than 5 psi as well, but I prefer running a harder tyre regardless, so I don’t know if 2.5 bar heats up too much or not.

I think mine are running around 232 kpa

 

[Rolfe]

I've just topped mine up to 2.6 cold, because I was getting boings. I also have a pinprick slow puncture on the off fore which needs a bit more air every couple of weeks. Hopefully it will all do till I have the summer tyres off in a couple of weeks, although I do have a 900-mile road trip before that.

My tyres were around 2.8 warm when I had the punctures on the Hardknott Pass and I wondered if that had anything to do with it, but my garage guru says he thinks not, it was just bad luck I hit something sharp. Twice.

 

[redwood98]

I've just topped mine up to 2.6 cold, because I was getting boings. I also have a pinprick slow puncture on the off fore which needs a bit more air every couple of weeks. Hopefully it will all do till I have the summer tyres off in a couple of weeks, although I do have a 900-mile road trip before that.

My tyres were around 2.8 warm when I had the punctures on the Hardknott Pass and I wondered if that had anything to do with it, but my garage guru says he thinks not, it was just bad luck I hit something sharp. Twice.

Just got in mine and they are actually around 2.4/2.5 but one is 2.8 (meant to reply to myself but it won’t let me delete this and repost it, I guess it sort of makes sense as you were talking about 2.8 tho)

 

[tsedge]

It is hard to tell if overinflated tyres contributed to a specific puncture.

In general, the harder the tyre, the less able it is to deform around sharp objects and the greater the puncture risk. Ride also suffers because of reduced sidewall flex.

I tend to inflate to 2.65bar (indicated 2.7 with 0.5bar relaxation after inflating). I have tried 2.8/2.85, but that affects the (not brilliant in the first place) ride too much for me. I've simply reconciled to inflating them more often.

I do wonder how many people have ever followed the advice to check and inflate your tyres regularly.

 

[MG Clive]

I do wonder how many people have ever followed the advice to check and inflate your tyres regularly.

I think us oldies tend to do it more than younger drivers, I know I check mine once a month, but I'll admit it sometimes stretches to nearer 2 months. I know many people who never ever check them though.