I’m looking for technical help or recommendations on: tyre pressures
I have just had a new pair of Yokohama Advan 105 V85 195x50x16 tyres fitted to the front of my ND. The old ones had 3mm left but as they were original 2016 tyres with 41,000 on them and were beginning to perish it was time for new boots. Got the tyres from my local back street tyre guy who fitted them all ok. Then he went and inflated them to 36psi? I queried this saying the book says ( these are OEM) 30psi? We agreed to differ. Who is right? I’ve been running at 30 since I got the car in September?
I run mine at 29 PSI which is what the manual says? Or the one I have anyway. Page 9-9.
36 PSI is way too high and I’d say would lead to excessive wear to the centre of the tread due to over inflation. As well as less than precise handling and a harder ride!
I don’t understand this trend for overinflation by tyre fitters, leak integrity check maybe, if you’re doing a proper job then set it back to the correct level!
My view has always been similar Ian - they inflate them to a higher level to make sure the bead seals correctly etc, and also check the tyre will hold air.
Yet they never seem able to let that excess air out again!
36psi is too high and will affect wear and handling. Had mine changed a few months ago and the garage set them at 38 all round. Car felt unbalanced and too twitchy around corners
It sounds like you made a wise choice in replacing your old tires, especially considering their age and condition. As for the recommended tire pressure, manufacturers typically provide guidelines in the owner’s manual for optimal performance and safety. Running at 30 psi, as per the OEM recommendation, is generally a safe bet unless there are specific reasons (like heavy loads or driving conditions) to adjust slightly. It might be worth checking with a trusted mechanic or referring directly to Mazda’s specifications to ensure you’re getting the best performance and longevity out of your new Yokohama Advan tires. Safe driving!
And do check and adjust the pressures when the tyre is cold. Best first thing in the morning or when cooler in the evening as there could be a difference of something like 3 psi warm v cool.
I went up the M1 back in Dec and the TPMS showed a problem. Having checked all were correct at 29psi only an hour earlier, and none had needed a top up since I bought the car a couple of months before, this signalled a serious problem.
Sure enough when I called into the services and checked them, the right rear was 29, but all three others were 34 as expected from 70mph. I had another twenty minutes of driving to do before fitting four new tyres, so put that one up to 40 and hoped it would last.
I checked them on arrival and sure enough 34 on three, and still 40 on the odd one. The tyre was undamaged and showed no sign of a puncture when taken off.
I reckon I might have disturbed how the 10 year old valve sealed shut before setting out, and it had been leaking ever since.
I’d forgotten to do my usual spit-test to check the valve was sealing! Never again.
I also fully agree on the 29psi level. The car handles absolutely fine at that pressure. And as stated, deciding to change your ‘old’ tyres was a good move.
Great, the ole’ tyre fitters, huh
I good idea for anyone who hasn’t built up a trust relationship with one, is bring in a price of paper with the tyre pressure, and wheel torque values required, and give it to him. Still mind, don’t bet on them still not being 8psi out, different for every wheel, and torqued incorrectly. Doing otherwise, see, takes effort and some sort of customer care.
