R-Comp tyre pressures
 

Hi folks, just wondering if there are recommended tyre pressures for running with R-Comps for a bit of MC work?

If it makes any difference the tyres are 225/45 R16, running them on an MY99.

Mind you if its raining tomorrow probably wont run with the R-Comps - from what I have heard they arent quite the same in the wet. :)

Cheers.

Hey Karl,
I run the same size r-comps as that and I run about 34psi cold. If you have newish R-comps, then I would still run them in the wet. They do get "interesting" when they are fairly warn and you hit a puddle :)

Darren

Cheers Darren, just needed that starting point.

I would run them at 28psi cold, and keep releasing air to keep them at 28psi as they heat up throughout the day.

At least that was what Leigh advised when I was racing for the RMS team last season, and it did make a difference in grip levels. I used to run them at 35psi, and then 34psi, and then 32psi, and then I asked Leigh what pressures he ran, and was shocked to learn he ran them at 28psi.

Obviously it depends on your driving style, what tyres you using and how your car is setup I suppose. 28psi worked for me, when I had Tein HA coilovers, a multitude of swaybars/bushes/etc, Bridgestone RE55S hard compound R comps.

I used to run mine at about 36psi warm..

going 30 or below caused the sidewalls to take a lot of the load and i would wear them very heavily, 36 maintained even wear and better grip than when running 30psi..

try and find where you are comfortable and what you feel gives you the best grip..

30 - 32 psi HOT is a good starting point. Most competition tyres are measured with tyres at operating temp. If you set pressures on a cold morning and then dont re-check them when they're hot you'll find you're running much too much pressure in the tyres.

Start with same pressure all round. You can change handling characteristics by playing with pressures. If car is understeering, try having 2psi lower in the fronts or 2 psi higher in the rears. General rule of thumb, lower pressure more grip, higher pressure less grip.

Even if it's raining, it's probably still worth having the r-comps until they are really worn.

Hmm, OK I might try 32psi cold/warm to start and check over the course of a few runs and see how that goes.

Thanks for the input guys!