I have these same tires. About 15K on them. But I never run them that high. Maybe I'm wrong but 55psi seems high to me.
I think I'm running 48 rear and 40 front or so.
Harry
90 2wd "plain jane"

Date:    Tue, 15 Apr 2008 22:55:00 -0400
From:    Chris S <szpejankowski@GMAIL.COM>
Subject: Re: tire rolling resistance

I just bought a set of Hankook RA08 tires from Discount Tires in 195R14
size.  Their load rating is nearly 2100 lbs at 65 psi.  They roll smoothly
and ride well at 55 PSI without undue sidewall flex.  The ride definitely
beats the Bridgestone RD603 I took off which behaved more like concrete
donuts.
_______________________
Harry Rosenblum
917.545.8614