^^ you are welcome,
for my 175/70 R13s, 29 or 30psi is enough for a smooth ride.. i always try to fill air from computerized air filling facility available at various pumps these days.. i never trust those road side tyre-walas.. plenty of time i have went there to balance the air but i always get abnormal tyre pressures, sometimes even exceeding 44psi
so better get the air filled from computerized pumps.