John Wrote: <<I've always kept it at 65-70, but would like to
cruise around 75 MPH. >>

My philosophy is that lower is better, but as long as I am in
the "solid green" zone on the tach things'll be OK. I shared
John's feeling, though - that I'd like to be able to cruise @
75 AND be in the "safe zone", which was my primary motivation
for going to 15" wheels with larger diameter tires. Now the
same engine RPM that produced 70 mph with my 185R14's produces
77.7 mph with my 215/75R15's - this is calculated, not
measured. And of course, the speedo still reads 70 mph because
it has no idea it's wearing bigger shoes.

Doug Fitz-Randolph
Yarmouth, ME
'90 Syncro