Tyranin

Can I get a second opinion on tyre pressure?

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Hi everyone, I have a Ford Fiesta 2015 model with tyres which are 195/50 R16.

I've always put them at front 2.3 bar (33 psi) and rear 1.8 bar (26 psi) because that's what my manual says and the placard in the car says they should be.

https://www.puretyre.co.uk/vehicle-placard-for-ford-Fiesta-13-17-195/50R16/

My mechanic has put them at the "correct spec" saying it's front 2.1 bar (30.5 psi) and rear 1.9 bar (27.5 psi). I'm really confused where these numbers come from. Searching around I can't find these alternative numbers anywhere and they can't give an answer other than insisting "That's the standard across all Fiestas"

Can I trust the mechanic with these pressures? They are an actual Ford dealership.

Are these numbers you would have used or would you go with what's on the Placard?

Many thanks in advance

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I have these tyres and put 30 psi in the rears and 37 psi in the front which is ford recommend eco pressure for a lightly loaded vehicle. Ment to increase fuel economy over standard pressure.

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I would stick to what is states on the B post and manual.

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"That's the standard across all Fiestas", I don't see how there can be standard psi for all of them when there are different size wheels with different profile tyres. let alone the different reccomended figures for  how many people are in the car. 

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Your pressures (front 2.3 bar (33 psi) and rear 1.8 bar (26 psi)) are correct.   If you were to change them to any significant degree your insurance company might not pay out in the event of an accident.

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2.3 front, 1.8 rear for all fiestas except 1.25, 1.4 petrol and 1.6 ecoboost which is 2.1 front 1.8 rear

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One of fords fuel saving tips is to increase pressures by 4 psi but no more On what the plate states. I don't see them doing this if there were any legal or safety issues in doing so.

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I had an accident some years ago when a guy ran into the side of me.   I claimed on his insurance and they sent an inspector round to examine my car.   The first thing he did was to check my tyre pressures.

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Thanks for all the responses. This is frustrating to hear. The garage is run by Hendy Ford, a ford dealership in the UK. I have no idea why he's done this, but he's set the TPMS at his unofficial settings so if I put the pressures on the B pillar on it's just going to trigger the TPMS.

Is there a way I can change this setting back myself? I'm looking at OBD2 tools but its unclear which ones allow you to change this setting and I don't want to break the bank. Would be nice if we could just set this on the dash. Can it be done in ForScan?

I guess with the insurance I can claim the dealership has liability if the insurance doesn't want to pay out. They represent Ford after all. They also sent me a video with the mechanic stating the tyre pressures he set them to.

Oh and it's a 1.0 Ecoboost 99bhp Titanium. Sorry I forgot to add that to my first comment.

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A tyre at high pressure saves fuel by basically not touching the road as much.

Some have said manufacturers spec pressures overly high to make their mpg figures look good.

 

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7 hours ago, Tyranin said:

Thanks for all the responses. This is frustrating to hear. The garage is run by Hendy Ford, a ford dealership in the UK. I have no idea why he's done this, but he's set the TPMS at his unofficial settings so if I put the pressures on the B pillar on it's just going to trigger the TPMS.

Is there a way I can change this setting back myself? I'm looking at OBD2 tools but its unclear which ones allow you to change this setting and I don't want to break the bank. Would be nice if we could just set this on the dash. Can it be done in ForScan?

I guess with the insurance I can claim the dealership has liability if the insurance doesn't want to pay out. They represent Ford after all. They also sent me a video with the mechanic stating the tyre pressures he set them to.

Oh and it's a 1.0 Ecoboost 99bhp Titanium. Sorry I forgot to add that to my first comment.

All you need to do is set the tyre pressures to the correct values( assuming you have an accurate tyre inflater/gauge) then reset the tpms in the settings menu in instrument cluster or sync radio display depending on age of fiesta. 

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Thanks iantt!

I'm taking that to mean devices like 'Autel Maxitpms TS508' don't support Fiesta because Fiesta don't have those options to begin with. Will go ahead and put it back to the manual settings then.

Best wishes

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Increasing tyre pressures does reduce rolling resistance, at the expense of reduced contact patch area.

If you live in Hampshire, would you not take your Ford to Tremona in Southampton ?

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20 hours ago, Bobr said:

I had an accident some years ago when a guy ran into the side of me.   I claimed on his insurance and they sent an inspector round to examine my car.   The first thing he did was to check my tyre pressures.

Did he claim that you hit the front of his car with the side of yours? 😁 Seriously, I would imagine he has a list of items to check. A 'one-size fits all' assessment.

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10 hours ago, Paulkp said:

If you live in Hampshire, would you not take your Ford to Tremona in Southampton ?

Never heard of them. Any good? I'm more East Hampshire but would love to check out an alternative specialist to Hendy

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A bit of a drive for you then, (especially with "Smart Motorway" work on M27 !!!) as they are in Millbrook, Southampton, but some customers come further than that to use them. I have been using them for about twelve years. Specialist Ford, especially RS cars. they are very good, Google them.

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"The tyre pressures stated in the manual are minimum pressure one should use." Said a tyre shop owner.  In my experience the values in the manual are quite low and if one follows them the tires are pretty soft. Previously I've followed the manual pressures with all three of my cars but I've always wondered that those are quite low. Nowadays i have higher pressure.

You can have higher pressure and you'll get better mileage with the cost of less comfortable ride and more tyre noise. Mine are currently 2,6 bar in front and 2,4 in back. More road noise but better economy. Tyre wear is uniform and there is not any excess wear in the middle area. For now my pressures seem to be ok but obviously one should still be cautious and not add too much pressure. In a couple of months I'm changing to winter tyres and I'll do a more thorough check of tyre wear. 

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