Tyre pressures

[meeko]

Just treated my Chim to a front set of Toyo Proxes T1Ss. What pressure should these run at? 22psi as per manual?

I have S03PPs on the rear at the reduced pressure of 22psi from 24psi. Any thoughts welcome.

Cheers,

Meeko

[chris43]

I find that the steering is very heavy at 22psi and am currently experimenting and 24 - 26psi is better but not sure if this will promote tyre wear.
Perhaps someone will comment.

[mick_coupe]

Got Toyo's on mine..also 24 front and 26 rear

Mick

[tvrbob]

Agreed. 24 - 26

After a little trial and error I found 24 OK for normal road use and 26 if the roads are dry and I want to play.

[parrot of doom]

I have P6000's on mine, 22 on the front and 26 on the back.

[2Munkys]

Interesting this as I've just fitted some of the T1 S's to the front of the Griff. The previous set were P zero's (perhaps not the ideal) which at their expiry indicated considerable under inflation: loadsa tread down the centre and bald at the inner/outer edges. These tyres were fitted when I bought the car and half worn, but, I continued with the recommended/previous owners inflation of 23 psi. Geometry had been checked and corrected and no track days i.e. no bonkers cornering antics; pure road work. Came to the opinion - as some of you suggest here - that a higher pressure would be more appropriate, perhaps by a couple of pounds or so. Front ends wearing 225's as opposed to something smaller may support this thought.

[PeterC]

Now running a full set of Toyo's bought from Kwik Fit in Market Harborough. They took 48 hours to source them but had no real trouble getting hold of them. Fitted expertly by a young guy called Simon. Cost £380 inc. of everything except a tip!

Tyre pressure set by KF after consultation with TVR dealer was 20 front & 22 rear. This gives a smoother ride on local rough roads compared with Bridgestones they replaced.

I will try slightly higher pressures at the weekend and let you know the difference to ride and handling. I am still driving them "gently" but I am well impressed so far.

[tone]

When I had mine fitted with new Toyos a couple of months back I e-mailed Toyo's tech bods. They advised me that the pressure should be 24 all round.

That's what I'm running with and she feels fine.

>> Edited by tone on Thursday 21st April 14:38

[steve1c]

I was running the front at 22psi and I agree, very heavy. tested it up to 25psi and found it much better. Hope this helps.

Steve

[meeko]

Thanks for the tips. Reckon 24 psi is right then. Am thinking of increasing the pressure in the rear S03s too. At 22Psi you can feel the flex in them when laying a lot of power down, say coming out of a bend.

[peteA]

meeko said:

Thanks for the tips. Reckon 24 psi is right then. Am thinking of increasing the pressure in the rear S03s too. At 22Psi you can feel the flex in them when laying a lot of power down, say coming out of a bend.

Just had toyos fitted to my 400 and am running 22 front / 24 rear and noticed the flex immediately - previous tyres were S02's. wasn't sure if it was just down to the difference in the tyres but i would prefer it to be a little firmer - think I'll try the higher pressures too and just keep an eye on tyre wear.

[oldgriff]

I have SO1s for road use and PZero D3 slicks for trackdays and Topcats Racing (who know a thing or two!) recommend 24psi for both. On track they recommend that once the tyres are warm you drop the pressure back down to 24psi again. So on very hot days it may be worth dropping the pressure on the road as well.

Am thinking about Toyos to replace the rear SO1s (now down to near the limit - are they as good as people claim?

[stackmonkey]

I've just (lunchtime) had some Toyo T1-Rs put on the rear. Rang TVR Power cos i forgot my manual and was told 22psi front, 24psi rear unless you're doing high speeds in which case raise the front to 24psi as well.

[tvrbob]

Why blindly believe somebody else.

The right pressure is surely the pressure that works best for you. Obviously you can't stray too far from the recommended settings. TVR and their dealership network are unlikely to have tested non-standard tyres to determine the optimum pressures. They are far more likely to specify what the book says. Well the book doesn't say anything about non-standard tyres.

Find a twisty undulating road and try your car a couple of PSI either side of the standard. You'll soon find the right pressure and if that pressure is a little higher for softer walled tyres then that makes sense.

>> Edited by tvrbob on Friday 22 April 20:25

[jwt63]

Toyos all round 25 on the front 28 on the rear Fitted last year, just passed the 20,000 miles mark on these reckon still got enough for another 5000!

[scared but happy]

Picked mine up from garage always felt like damper fault BUT found tyres had 34psi all round

I suspect the "boy (read tea boy)" either misheard or thought 24 seems very low for car tyres. Feels a lot better now.