tyre pressures

[Simon Dickens]

:D New there was something that I forgot
whats sort of tyre pressures should i put in for the stratos for road use?
It runs Pirelli P7 225/50/15 at rear and 205/50/15 at front.

Thanks Simon

[chris.richard]

Colin Artus posted tyre pressure suggestion recently.
Check your tyre pressures! You need about a 6 psi differential front to back and probably lower than you might expect ; try 18 front 24 rear as a start.

[Arthur]

Corse I with Alpha V6.

I recently canned a set of 225/45 rears and 205/50 fronts (Falken gr-betas).
I had gradually reduced my first best guess of 24 front / 28 rear over a couple of thousand miles and a track day to the (almost) final 18 psi front / 22psi rear, which I ran for 12K miles plus.
When I finally canned the tyres at 15K plus a bit miles, the front wear was dead even, so 18psi retained. The rear tyres were a little more worn at the crown than the shoulders (allowing what I ground off 'em on track) so I've reduced to 20psi rear.
Incidentally, the rears were still legal, just, but getting skittish if the humidity rose, but the fronts still had, I guess, about 4 or 5K miles life.

I can't see any rationale for a differential front to rear, since the tyre size and section is not likely to be the same. Basically you need to know what the tyre wants to see, and that takes time to find out.

FYI, I'm now running Toyo Proxes T1R all round, 225 rear, 205 front, 50 section all round. Dry grip is hugely more than the old Falkens, wet grip still to be tested. (i've been away some months). Incidentally, the difference in speedo reading changing from 225/45 to 225/50 is not more than 4 mph in the ton. Approx 3 at the legal 70.

[chris.richard]

Welcome home Arthur. Please post often!

[Sando]

I'm now running Toyo Proxes T1R all round,... Dry grip is hugely more than the old Falkens, wet grip still to be tested

Welcome home Arthur.
I agree, I have 205 Proxies on the front of mine and they are great in the dry..... and superb in the wet too.

[Arthur]

Rob

Thanks for the wet advice - I'll maybe be a bit braver leaning on them. It's just the speed this thing will go round bends on any old trash - starts to raise a sweat on the road on good rubber when you know the town planners haven't even considered run-off on slip roads and such. Basic oversight, I feel, same as kerbs without a gentle upslope, pedestrians, and the like.

I rather like the Proxes - as they rolled the car off the fitting ramp, it squealed like a butchered pig, and left 4 tyre tracks on the floor paint. Good-oh!