What is the optimum tyre pressure?

[strgas]

trial and error is always good comprise between wear and tear grip handling performance ever car is different and every driver is different , a softer tyre will grip and handle better and ride better , a hard tyre will ride harsh and give good economy but traction and tyre wear will be reduced . extended high speed use or highway driving will increase heat and tyre pressure .

 

[Calaber]

trial and error is always good comprise between wear and tear grip handling performance ever car is different and every driver is different , a softer tyre will grip and handle better and ride better , a hard tyre will ride harsh and give good economy but traction and tyre wear will be reduced . extended high speed use or highway driving will increase heat and tyre pressure .

True, and under-inflation leads to greater rolling resistance, greater heat, reduced grip and reduced tyre life. No pressure is perfect for every condition, but my point was that your recommended pressures were a bit low for the best balance of durability and performance.

I'm not suggesting that my pressures are perfect, by any means, and they might not suit some drivers, but I do believe that they are better suited to the OP than your recommendations.

 

[mooks6669]

so what do you reccomend for my ss ute with 18's? stick to 38psi cold or run 36psi cold? i always inflate when stone cold too..

 

[wrx884]

stick 2 38's if ur unloaded but if ur caryin a bit of weight 40-42 is enough.

the general rule is:

15-16", 34-36psi
17- 18', 36-38psi
19-20", 38-40psi

 

[Nackerz]

i run 32psi all round seems like a good pressure

 

[OCa]

My old commo had those wet set racing kumho tyres, 17", for sum reason they asked for 45psi. Just check the tyre wall and make a judgement on what you think if ur gunna b loaded or unloaded.