Tyre pressures

I’m also happy to report I seem to be gaining an extra 3/4 MPG , so if I can keep them a few years they should pay for themselves, happy days :thumbsup:
 
Did anyone notice a drop in mpg going from RFT to nonRFT.
We should because the RFT were so hard causing tramlining yet were they less grippy, less rolling resistance?
 
I came to a 35iS from an AWD Porsche 911 and was disappointed. I then took off the runflats and felt much better. The BM still doesn't road-hold as well as the porker (of course), but doesn't have a chocolate engine and the roof's a joy, albeit with the occasional heart-stopping moment.
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The Porsche taught me some key lessons, though, the most obvious of which was the critical importance of tyres: buy the best and, if you're going drive them fast and 'actively', use the maximum recommended pressures (which I did in the porker for 60k miles and have done in the BM for 90k).

A side advantage of these pressures is longevity, which the annual pre-MoT service reveals.
 
Yes reading about high pressure for track use.
It reminded me today, quick ride out, the effect of ambient temperature.
It's been near freezing last 2 weeks (months) about 3-4 degrees C daytime at best. Frosty cold soaked tyres.
Today i drove out and temperature was 8-10 degrees. What a difference the car felt, warmer tyres and road.
Might explain why driving roof down so good, not the roof, but fact temp. has to hit 10 C before i put the roof down!
(Brilliant flying weather though, high pressure, cold clear skies).
 
B21 said:
I trust you haven’t had a relapse and are on the pop again?
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Considering I am on your 'ignore list', you seem to know a lot about me. Should I be worried?
I gave up the 'pop'. Have you given up the 'pies'? :lol:

I didn't read the rest of your post TBH, as I just know it will be exceedingly boring (mostly researched from Google) and a load of bollox to justify yourself to the crowd because some (not many IMO) still think you know what you are talking about.

But, of course, this won't be read because I am on your 'foe' list. Oh well, never mind. :roll:
 
Other aspects of tyre pressure are consistency and longevity of wear, of course. My experience of both at 10k miles/annual measurements is very good. The tyres not only perform well, but last well, too.
 
on another note, my car got towed to the local pound yesterday (apparently parked in suspended bay) now my lovely new tiers are tracking to the right, probably where they just dumped in on the back of the truck, gonna have to take it back and have the alignments done again. so angry
 
Ouch! Reminds me of seeing an Istanbul policeman open a BMW - in order to tow it away - by inserting a big screwdriver between roof and door.
 
Update: After taking the car back for realignment they realized that they had set it up as a different year Z, so they redone it and it has transformed the car comfort level, so in conclusion the Sport 7s are great and 34/38 PSI works extremely well ,also you can get better than a Kwick Fit Fitter!!!!
 
Kane1234! said:
Update: After taking the car :thumbsup: back for realignment they realized that they had set it up as a different year Z, so they redone it and it has transformed the car comfort level, so in conclusion the Sport 7s are great and 34/38 PSI works extremely well ,also you can get better than a Kwick Fit Fitter!!!! :thumbsup: :driving:
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Kane1234! said:
Update: After taking the car back for realignment they realized that they had set it up as a different year Z, so they redone it and it has transformed the car comfort level, so in conclusion the Sport 7s are great and 34/38 PSI works extremely well ,also you can get better than a Kwick Fit Fitter!!!!
Click to expand...


Good to know 34/38 works for you ..FWIW I don’t find my car, which is heavily modified seems very sensitive to tyre pressure, maybe the mods mask the tyre pressure changes…currently on 32/34 but will try 34/38..just to see..
 
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