Tyre Pressures

ZTec

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Hi all,
Since I've changed my wheels and tyres I'm not sure what the pressures should be as my handbook doesn't cover the new size nor does the label inside the drivers door.
Pirelli P Zero Nero all round, 225/40/18 Front, 255/35/18 Rear
Can anyone help please.
 

t-tony

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Hi all,
Since I've changed my wheels and tyres I'm not sure what the pressures should be as my handbook doesn't cover the new size nor does the label inside the drivers door.
Pirelli P Zero Nero all round, 225/40/18 Front, 255/35/18 Rear
Can anyone help please.
First thing I would do is check what pressure the tyre fitter left them at, mostly it's at whatever the tyre "popped" onto the rim at ! (could be as much as 40 psi). Personally I would start with 34 front and 38 rear and see how that feels.

Tony.
 

Redline

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First thing I would do is check what pressure the tyre fitter left them at, mostly it's at whatever the tyre "popped" onto the rim at ! (could be as much as 40 psi). Personally I would start with 34 front and 38 rear and see how that feels.

Tony.
Nice to know tyre fitters know their job and send you out with completely the wrong pressures. I assumed they would put set them correctly. I'll be checking mine before I drive off now.
 

billz

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I have the same size tyres and run 33psi all round
 

Bozzy

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Hi all,
Since I've changed my wheels and tyres I'm not sure what the pressures should be as my handbook doesn't cover the new size nor does the label inside the drivers door.
Pirelli P Zero Nero all round, 225/40/18 Front, 255/35/18 Rear
Can anyone help please.
My fronts are same size as yours Tec,the rears 245's and I run them at 33psi same as Billz.
Edit : Mine are 17 inch rims.
Steve
 

Grumps

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I run at 32psi all round. Same size tyres as @ZTec
 

mwpe

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I never trust tyre fitters or car dealers, When I bought my Zed from a well known BMW dealer, one of the first checks on getting home was tyre pressures. They were all about 28 psi. I have just had two new rears fitted and on checking at home they were both about 30.
 

ZTec

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Many thanks to you all for your responses, duly noted. Have a great day.

Tec
 

t-tony

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Please note I did say see how you go from there. Personally I think 28 all round on a rear wheel drive car is wrong and too soft, but, if it suits your driving style that's ok. If you run pressure too low you will roll the edges off your tyres way before you run out the centre. I run my tyres a couple of pounds higher at this time of year than during the cooler months too.

Tony.
 

miller1098

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M
Hi all,
Since I've changed my wheels and tyres I'm not sure what the pressures should be as my handbook doesn't cover the new size nor does the label inside the drivers door.
Pirelli P Zero Nero all round, 225/40/18 Front, 255/35/18 Rear
Can anyone help please.
32 for me all round exactly same set up as yours,although my engine is a little heavier than yours
 

Sean d

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Please note I did say see how you go from there. Personally I think 28 all round on a rear wheel drive car is wrong and too soft, but, if it suits your driving style that's ok. If you run pressure too low you will roll the edges off your tyres way before you run out the centre. I run my tyres a couple of pounds higher at this time of year than during the cooler months too.

Tony.
I initially set the pressure at 32 when I put the 18s on but took advice off a mechanic to drop the pressure to alleviate the tram lining issue as it would give a little movement in the narrow side walls, it worked
 

oldcarman

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Have found over the years that tire brand play a big part in tire pressures I run. Finding their sweet spot takes some time and patience but some are softer and some are harder compounds so it's a no perfect pressure for all!! JIM
 

Redline

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32 front and 38 rear for me if I remember correctly. Haven't played around with the pressures to be honest - just set as recommended.
Just done one of the kids bikes 50 front and rear :eek: and that was with a hand pump. :arghh:
Am amazed they don't explode! :nailbiting:
 

t-tony

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Only reason I put mine up to 34 front was it was starting to take out the tyre edges.

Tony.
 

Stevo7682

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Door sticker on mine says 2.0 bar front and rear for 225/45/17 and 245/40/17 that's what I'm running my 18 " at with Michelin ps3 front ps4 rear drives great can't comment on wear rate not had them on long.
 
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