sonic113 Posted July 28, 2015 Share Posted July 28, 2015 Ok I Have a little issue over tyre psi. On my door sticker it states front 30 rear 33. I have noticed that car is a little bouncy on road and I was thinking maybe because rear tyres had a little more psi that front so now in trying 33 psi all round. All shocks and suspensions have been checked and are ok so was think maybe tyre pressure may help. Every to e I come out of tyre centre they never have same psi in wheels as always two different t guys do each side of car each if you know what I mean onetime ds was 34 and ps was 28 so I always check psi after tyre changes now. Does this sound like an ok psi (33) to use a car is mostly always loaded with family of 4 and boot full of stuff lol! What pressures do you guys run and what psi do you find gives the better overall ride vs tyre wear ext. Quote Link to comment Share on other sites More sharing options...
james_60 Posted July 28, 2015 Share Posted July 28, 2015 Hi I find the tyre pressures on the door sticker a tad conservative. I tend to put 36psi all round I stuck to the proper lower figure and got told that my tyres are wearing at both edges and not in the middle (too low pressure) Cant Win Jamie Quote Link to comment Share on other sites More sharing options...
RSFSS Posted July 28, 2015 Share Posted July 28, 2015 Estate or hatch? I have estate, always loaded up and I generally have 35 front, 35-38 back depending on weight. Tyres fitted may be different to the sticker on door, check what psi is marked on tyre, its all trial and error, just watch for uneven wear and if you gave alloy wheels air will leak Quote Link to comment Share on other sites More sharing options...
Phil 87 Posted July 28, 2015 Share Posted July 28, 2015 I've always stuck to the recommended pressures and never had a problem, but each car is different. For my car the recommended pressures are 36 front and 26 rear, probably because of the low profile of the tyres. I've noticed my rear tyres seem to be wearing more at the edges too, but there's hardly any wear on them at all from over a year and 13k miles (althrough the fronts are ready for replacement). Having said that I've noticed the debris picked up by the tyres goes all the way to the edge of the front tyres, but not quite to the edge of the rears. I guess that's normal on a front-heavy car even with the huge difference in psi, so I'm not worried unless I start to see a real problem with uneven wear. Quote Link to comment Share on other sites More sharing options...
south_bound Posted July 28, 2015 Share Posted July 28, 2015 Fronts ready for replacement at 13k miles? Thats insanely early. I run mine at 38-40psi all round, mainly motorway or A road driving and find the ride better than at lower pressures. Tyre walls state max 51psi so theres no issue with over-inflating I use Michelin Primacy or Energy+ and get better mpg at those pressures, and they last 45-50k miles between changes. Quote Link to comment Share on other sites More sharing options...
Phil 87 Posted July 28, 2015 Share Posted July 28, 2015 Yeah it is a bit early, I could get some more miles out of them but don't like to let them get much lower than 3mm. And it is an ST so you can imagine the kind of driving that the front tyres have to deal with ;) You're probably right about running at higher pressures if you get a better ride, but you might have a bit less grip when you really need it. Quote Link to comment Share on other sites More sharing options...
Enduser Posted July 28, 2015 Share Posted July 28, 2015 In my motorcycle days we had a talk from a guy from Avon Tyres. He said that the manufactures stated tyre pressures are for average use, he suggested that you should experiment with raising or lowering pressures a little to see what suits you best. Quote Link to comment Share on other sites More sharing options...
south_bound Posted July 28, 2015 Share Posted July 28, 2015 Yeah it is a bit early, I could get some more miles out of them but don't like to let them get much lower than 3mm. And it is an ST so you can imagine the kind of driving that the front tyres have to deal with ;) You're probably right about running at higher pressures if you get a better ride, but you might have a bit less grip when you really need it. Fair enough, I probably don't even push my 1.6TDCi as hard as I could but can imagine they wouldn't last as long on something with more go. Quote Link to comment Share on other sites More sharing options...
sonic113 Posted July 29, 2015 Author Share Posted July 29, 2015 Well been driving around all day with 33 psi all round and i can say it makes a great difference to the car. Like some mention above I used to go by the sticker on the door and found my front tyres where wearing early around the edges and not much in the center. I see some of you felas are running higher psi readings like 36 and 38 ect will this not wear tyres faster or does this give a better ride? Quote Link to comment Share on other sites More sharing options...
artscot79 Posted July 29, 2015 Share Posted July 29, 2015 On mine its 30 front 32 rear based on 3 people weighing 12 stone etc on the road ive experimented with it I run 28 front 30 rear with no impact on mpg if I overinflate I find the steering too light no issues with tyre wear Experiment till you find a balance you're happy with 1 Quote Link to comment Share on other sites More sharing options...
sonic113 Posted July 29, 2015 Author Share Posted July 29, 2015 On mine its 30 front 32 rear based on 3 people weighing 12 stone etc on the road ive experimented with it I run 28 front 30 rear with no impact on mpg if I overinflate I find the steering too light no issues with tyre wear Experiment till you find a balance you're happy with Thanks Arthur. At the moment 33 all round seems to be fine both on steering and actual rise. I will keep an eye on tyre wear but I always thought sticking to manufactures pressures was better but I guess its better to experiment and see what works for yourself. Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted July 29, 2015 Share Posted July 29, 2015 I'm running 34psi all round - but on warm tyres as I don't have a local tyre machine! So probably 32 when cold. I found 30psi (warm) in the fronts far too 'soggy' for B road bashing lol. 2 Quote Link to comment Share on other sites More sharing options...
mrgrumpy88 Posted July 29, 2015 Share Posted July 29, 2015 So is it general consensus that anywhere between 33 and 36 is best. 1 Quote Link to comment Share on other sites More sharing options...
theredfox Posted July 29, 2015 Share Posted July 29, 2015 34 psi for me 1 Quote Link to comment Share on other sites More sharing options...
blue flash Posted July 29, 2015 Share Posted July 29, 2015 34 for me as well.. 1 Quote Link to comment Share on other sites More sharing options...
artscot79 Posted July 30, 2015 Share Posted July 30, 2015 30 cold i only adjust my tyres when they are cold if youre putting 34 in cold that becomes 36 or more with the heat i have thicker sidewalls so no soggy feeling for me 1 Quote Link to comment Share on other sites More sharing options...
Incontro Posted July 30, 2015 Share Posted July 30, 2015 Thanks Arthur. At the moment 33 all round seems to be fine both on steering and actual rise. I will keep an eye on tyre wear but I always thought sticking to manufactures pressures was better but I guess its better to experiment and see what works for yourself. I also have a Mk2.5. Mine is a petrol, and 33 PSI all round works well for me too, the recommended pressures on the sticker are too low in my opinion. 1 Quote Link to comment Share on other sites More sharing options...
sonic113 Posted July 31, 2015 Author Share Posted July 31, 2015 I also have a Mk2.5. Mine is a petrol, and 33 PSI all round works well for me too, the recommended pressures on the sticker are too low in my opinion. yeah 33 psi when cold seems to be going great in the car after a few days of driving. I think I will keep it at 33 all round from now on. I also found that the recommended sticker pressures where too low especially on the front. Quote Link to comment Share on other sites More sharing options...
Enduser Posted August 17, 2015 Share Posted August 17, 2015 My door sticker says 31psi all round. I was surprised at this because on other cars I have owned the front and rear tyres have always had different pressures. Quote Link to comment Share on other sites More sharing options...
Phil 87 Posted August 17, 2015 Share Posted August 17, 2015 It seems like the recommended pressures change so they are further apart on lower profile tyres - the pressure for the front goes up and for the rear it goes down. At least that's what I've seen on my 3 Fiestas. Quote Link to comment Share on other sites More sharing options...
Jeremyc Posted August 17, 2015 Share Posted August 17, 2015 You all say the stickers are too low but mine says 33 psi for 18"/40 and it feels and rolls great. Quote Link to comment Share on other sites More sharing options...
theredfox Posted August 17, 2015 Share Posted August 17, 2015 mine say's increase tyre pressure in rear if carrying 3 or more people crazy info Quote Link to comment Share on other sites More sharing options...
Phil 87 Posted August 17, 2015 Share Posted August 17, 2015 ^ Yeah I've always found the part about increasing the pressure with more people an luggage confusing. It seems to say if you have 3 or more people and quite a lot of luggage, then you need to use these much higher pressures. But what if you have 3 people and not much luggage? That's what I had when I did a long journey for work a few years ago with my 2004 Fiesta, kept it at the default pressures which I think were 29 and 28 because we didn't have that much luggage. It was perfectly fine, but it makes me wonder if there was a higher risk of the tyres blowing out or something with the extra weight in the car lol. Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted August 17, 2015 Share Posted August 17, 2015 It's just to offset the added weight squashing the tyres and causing more wear/rolling resistance. 2 Quote Link to comment Share on other sites More sharing options...
madmole Posted August 17, 2015 Share Posted August 17, 2015 Mines 31/31 officially BUT, its a trade off. higher pressures will give less rolling resistance and faster turn in at the expense of ;lateral grip. Softer with give better grip while cornering, but the sidewall flex will loose control sooner and you are less prone to tramlining So its a personal thing, if you do a ton of moorway cruising then a few PSI extra is good, if you live in the countryside and do a lot of tight twisting bends then lower is better Best way is a G meter, you drive in a tight circle and measure max G when she slides and at what PSI, when you have found the best PSI for lateral grip, you then adjust it slightly up to add turn in and stability Different loads, tyres, tyre size and conditions all alter what is best. My landy uses 36/45 for road and 18/22 off road. I know folks that use 8psi (they have rim locks). I would say anywhere between 28 to 36 is around right for the Focus I have a third party TPMS system fitted and its quite fun to see the changes. Pressure normally rises by 2-5 psi on the motorway and through driving above cold. Tempoerature changes a lot and is more proportional to how hot the road surface is. On the conti's grip drops off considerable below 7C 1 Quote Link to comment Share on other sites More sharing options...
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