255/35/18 tyre brand advice

[Anmarube]

Had Michelin PS4 fitted last weekend and they have transformed the car from the Bridgestone runflats. A lot softer tread and sidewall giving much more feel through the steering and loads of confidence wet or dry. They were crap in the snow this week though....
Most expensive tyres I've ever purchased but so worth it. The look of the sidewall is nice too if that matters.

How are you finding the Ps4 tyres in general. I'm wavering between those and the vredestein vorti as there is only a £16 difference

The difference between the PS4 and any other tyre I’ve driven is night and day.

Try Blackcircles or Tyreleader if you’re looking to cut costs.

To be totally honest they are the most expensive tyres ive purchased for my own car and definitely the best.
Totally different to the Bridstone runflats and give more feel and loads more confidence..I had the fronts fitted a week earlier than the rears so was still on runflats at the rear and the front was so planted and the rears were stepping out everywhere...Can't rate this tyre high enough...always had premium bike tyres but always mid range car tyres even on quick cars as never drove that fast but these just want you to push them on and find out whether I have the talent or not..
The tyres certainly have but not too sure about me.

 

[mr nurburgring]

Bridgestone pozenza RE050. Run flat.

 

[Scrobes]

Hey guys I am considering alternative options to the Bridgestone Potenza runflats, and am just wondering something. Apologies if this is a stupid question, but does the speed rating value not matter too much? The 88W/90W etc. I was looking at Michelin PS4 and wasn't sure about the possibilities of it. Thanks in advance!

 

[ben g]

Hey guys I am considering alternative options to the Bridgestone Potenza runflats, and am just wondering something. Apologies if this is a stupid question, but does the speed rating value not matter too much? The 88W/90W etc. I was looking at Michelin PS4 and wasn't sure about the possibilities of it. Thanks in advance!

88W and 90W both have the same speed rating as the speed rating is the W, which is 168mph according to Google.

The 88 and 90 are the load ratings, 88 being 560kg per corner and 90 being 600kg.

The Z4 will easily fit in the lower of those weights, so it's not an issue.

 

[Scrobes]

Thank you ben. So as long as I am looking at tyres with W rating, it''s fine? (But not Y for example..)

 

[R60BBA]

Y is a higher speed rating (186mph).

I reckon a 3.0si Z4 could do over 168mph down a hill with a slight tailwind and so I would invest in a tyre with a Y speed rating should you wish to test this.

I changed to Michelin PS4s in Feb (225/40/R18Y + 255/35/R18Y)

No regrets!

 

[Scrobes]

Hey, it just occurred to me. With changing from runflats to normal, does it count as a modification? Did you guys update your insurance?

 

[R60BBA]

Hey, it just occurred to me. With changing from runflats to normal, does it count as a modification? Did you guys update your insurance?

Technically it does count as a modification as a mod denotes any changes made to the car which differs from factory specification.

However, it’s not that big of a deal and I doubt an insurance company would refuse to pay out a claim because you upgraded to Michelin non run flats.

Nevertheless, from a peace of mind perspective, it wouldn’t hurt to inform your insurance company.

 

[mjennings23]

Regarding load ratings, is there any benefit to a lower rating?

I only ask as I recently changed tyres and the rears could be had in 93 and 97 load. However the 97 was £20 a tyre cheaper and so I went for them. Can't imagine any reason not to, after all load rating generally means a tyre can take more pressure, and thus more weight. At 2.5 bar the maximum load was pretty much identical.

 

[Mandotim]

I changed wheels and tyres a couple of months ago, and ditched the runflats. My rears are now 255/35 18 on 8.5 CSL reps. I went for Uniroyal Rainsport 3 all round, a mid-range tyre with good reports for wet grip. Couldn't be happier with these. They may lack the ultimate dry weather grip of the high end tyres, but they are closer than the price would suggest (I've driven a Z with PS4s before deciding on the Uniroyals). Where they really score is in the wet. Forget all the marketing rubbish about 'sharkskin technology' and so on; the wet grip is the best I've ever driven, and my coupe feels absolutely planted, even in heavy rain and standing water.

 

[philbo909]

Hey, it just occurred to me. With changing from runflats to normal, does it count as a modification? Did you guys update your insurance?

I let my insurer know and they were confused why I did... Better safe than sorry I suppose

 

[kis]

They probably were thinking "you're just changing the tyre" why you telling us?