ledzz10 Posted April 26, 2021 Share Posted April 26, 2021 Hey guys Had 4 pilot sports fitted 200 miles ago but the steering inputs barely anything at speed Would this be normal Alignment done and tyre pressures are right Thankyou Quote Link to comment Share on other sites More sharing options...
unofix Posted April 26, 2021 Share Posted April 26, 2021 24 minutes ago, ledzz10 said: but the steering inputs barely anything at speed Hi James, can you explain your problem a little more ? Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 26, 2021 Author Share Posted April 26, 2021 Yeh sure On b roads at speed the steering feels very vague and have no idea what the front ends doing Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 26, 2021 Author Share Posted April 26, 2021 1 hour ago, unofix said: Hi James, can you explain your problem a little more ? Thankyou Quote Link to comment Share on other sites More sharing options...
unofix Posted April 26, 2021 Share Posted April 26, 2021 Hi James, I know you say the tyre pressures have been checked but it does sound like the front tyre pressure is a couple of pounds too high. Have you looked at the tyre label stuck on your car (inside door post?) Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 26, 2021 Author Share Posted April 26, 2021 The right pressure is 36 and 26 and these have been done with a digital tyre pressure and then used an analogue gauge to make sure Quote Link to comment Share on other sites More sharing options...
Matt Alsop Posted April 26, 2021 Share Posted April 26, 2021 I have Michelin Pilot Sports on my Red Edition Zetec S (ST Line) (17 inch wheels) and find about 31 or 32 PSI on the front feels about right for me..........if that helps at all. The rears are set to 30 on mine. Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 26, 2021 Author Share Posted April 26, 2021 Would of thought the manufacturers would of been best Thanks though May experiment bud Quote Link to comment Share on other sites More sharing options...
Tiexen Posted April 26, 2021 Share Posted April 26, 2021 6 hours ago, ledzz10 said: Hey guys Had 4 pilot sports fitted 200 miles ago but the steering inputs barely anything at speed Would this be normal Alignment done and tyre pressures are right Thankyou Found this on another forum: New tyres are coated in a releasing agent to stop them sticking to the mould during manufacture. This releasing agent acts as a barrier between the tyres rubber and the road surface, thus reducing the tyres initial grip level (especially on damp/wet roads!). This can lead to owners thinking that the tyres are defective when they are not. Next, new tyres are not perfectly round when they come out of the moulds and the tread blocks are not all at the exact same height. The tyres have slight high spots on them that wear away after the first couple of hundred miles or so. This can also make a car feel skittish on new tyres. Finally, new tyres need to bed-in to suit your cars chassis/suspension setup. No two cars will have the exact same geometry/alignment etc., and again, new tyres need a couple of hundred miles for their tread blocks to wear down to suit the car. 1 Quote Link to comment Share on other sites More sharing options...
wordchild Posted April 26, 2021 Share Posted April 26, 2021 1 minute ago, Tiexen said: Found this on another forum: New tyres are coated in a releasing agent to stop them sticking to the mould during manufacture. This releasing agent acts as a barrier between the tyres rubber and the road surface, thus reducing the tyres initial grip level (especially on damp/wet roads!). This can lead to owners thinking that the tyres are defective when they are not. Next, new tyres are not perfectly round when they come out of the moulds and the tread blocks are not all at the exact same height. The tyres have slight high spots on them that wear away after the first couple of hundred miles or so. This can also make a car feel skittish on new tyres. Finally, new tyres need to bed-in to suit your cars chassis/suspension setup. No two cars will have the exact same geometry/alignment etc., and again, new tyres need a couple of hundred miles for their tread blocks to wear down to suit the car. Yeah, in a similar vein I was wondering if your tyres just need another 100-odd miles to bed in fully? Could be wrong... Quote Link to comment Share on other sites More sharing options...
Zico Posted April 26, 2021 Share Posted April 26, 2021 I have noticed a little less feedback in my PS4's but they have far more than 200 miles on them (must be just over 2 years since I had them fitted but not sure on the mileage done). I had been trying to stick to 36 front and 28 rear (mainly as I have had a slow leak on the valve/alloy somewhere). One time I used my Ryobi tyre inflator to inflate (from cold) my tyres before heading out. I did notice at that point that control did seem lacking and re-checked the levels at the local Sainsburys and found that the readings were almost 3 PSI higher (39 front instead of 36). Not sure if the Ryobi dial is positioned incorrectly as it was reading 36 when I used it that morning. After letting out some of the air at the petrol station the car felt much more in control. Quote Link to comment Share on other sites More sharing options...
Bobr Posted April 27, 2021 Share Posted April 27, 2021 14 hours ago, ledzz10 said: The right pressure is 36 and 26 and these have been done with a digital tyre pressure and then used an analogue gauge to make sure I think 36 is a bit high for the fronts. I think it should be 33. Quote Link to comment Share on other sites More sharing options...
Frembrit Posted April 27, 2021 Share Posted April 27, 2021 Wow! 😲 36psi on the front of a Fiesta ST...seems to be correct as per Ford specs. (only 35psi in my Mondeo with a massive/heavy diesel engine 😂) As mentioned above, they may need longer to bed in. What tyres did you have previously? As you know different manufacturers make tyres to their own specs, and although I don't have experience of the PS4 I do have the PS4S tyres on my car. In comparison to the Bridgestone RE050 (OE fit on my car), the Michelin's are no where near as direct because they have a much softer sidewall than the Bridgestone's. I also find that the PS4S tyres need a bit of warming up before they start to feel better. So, maybe your previous tyres had a harder sidewall? Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 28, 2021 Author Share Posted April 28, 2021 On 4/26/2021 at 9:46 PM, Zico said: I have noticed a little less feedback in my PS4's but they have far more than 200 miles on them (must be just over 2 years since I had them fitted but not sure on the mileage done). I had been trying to stick to 36 front and 28 rear (mainly as I have had a slow leak on the valve/alloy somewhere). One time I used my Ryobi tyre inflator to inflate (from cold) my tyres before heading out. I did notice at that point that control did seem lacking and re-checked the levels at the local Sainsburys and found that the readings were almost 3 PSI higher (39 front instead of 36). Not sure if the Ryobi dial is positioned incorrectly as it was reading 36 when I used it that morning. After letting out some of the air at the petrol station the car felt much more in control. Hey buddy Petrol stations are famous for not having a urate tyre pressures Maybe you felt more due to the pilot sports having a soft sdewall and over inflation does help with feel Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 28, 2021 Author Share Posted April 28, 2021 On 4/27/2021 at 10:25 AM, Frembrit said: Wow! 😲 36psi on the front of a Fiesta ST...seems to be correct as per Ford specs. (only 35psi in my Mondeo with a massive/heavy diesel engine 😂) As mentioned above, they may need longer to bed in. What tyres did you have previously? As you know different manufacturers make tyres to their own specs, and although I don't have experience of the PS4 I do have the PS4S tyres on my car. In comparison to the Bridgestone RE050 (OE fit on my car), the Michelin's are no where near as direct because they have a much softer sidewall than the Bridgestone's. I also find that the PS4S tyres need a bit of warming up before they start to feel better. So, maybe your previous tyres had a harder sidewall? Strange how the st have so much pressure for a light vehicle yeh agreed Had Bridgestones before probably why they feel soft Sort of getting used to them have a feeling pumping them to 38 would help with the steering though Quote Link to comment Share on other sites More sharing options...
Ad@m Posted April 28, 2021 Share Posted April 28, 2021 Ford recommend the front PSI on the ST 180 to be 36 or 40, and the rears at 26 or 30. If the sidewall is too soft, 40 PSI on the front will help make it firmer. The OE Potenza RE050A did seem to have a hard sidewall. About 2 years ago I replaced all my tyres with Hankook Ventus Evo 2 K120's and I regret it. Jelly sidewall, really affected the handling. Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 28, 2021 Author Share Posted April 28, 2021 Where have you heard 40 buddy Not seen that anywhere Yeh heard about the ventus tyres More of a soft road tyre Quote Link to comment Share on other sites More sharing options...
Ad@m Posted April 28, 2021 Share Posted April 28, 2021 https://www.fordservicecontent.com/Ford_Content/catalog/owner_guides/14fstst1e.pdf On Page 21, I was slightly wrong. + 3PSI for high speed driving . Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 29, 2021 Author Share Posted April 29, 2021 21 hours ago, Ad@m said: https://www.fordservicecontent.com/Ford_Content/catalog/owner_guides/14fstst1e.pdf On Page 21, I was slightly wrong. + 3PSI for high speed driving . Thank you buddy never knew that Quote Link to comment Share on other sites More sharing options...
MarksST Posted April 29, 2021 Share Posted April 29, 2021 23 hours ago, Ad@m said: https://www.fordservicecontent.com/Ford_Content/catalog/owner_guides/14fstst1e.pdf On Page 21, I was slightly wrong. + 3PSI for high speed driving . That’ supplement is for the US STs which use different pressures. US B pillar decal UK B pillar decal 1 Quote Link to comment Share on other sites More sharing options...
ledzz10 Posted April 30, 2021 Author Share Posted April 30, 2021 11 hours ago, MarksST said: That’ supplement is for the US STs which use different pressures. US B pillar decal UK B pillar decal Legend What would you recommend if say you went to Germany and did a lot of speeds above 100mph but also a lot of normal speeds Would you say 39 and 28 would still be best without messing up the handling Asked this on the fiesta st owners but the admins are karens who still sleep with mumma and deleted it Thanks buddy Quote Link to comment Share on other sites More sharing options...
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