O.T.: Unidirectional Tires

[Ron A]

I've been wondering why the outside edges of my front tires would
"sawtooth" on my Kumho Ecsta Supra 712s, then make a roaring noise. Here
is an interesting link from Tire Rack.

http://www.tirerack.com/tires/tests/hydroplaning.jsp

They test unidirectional tires in the wet and the dry and then again
with them turning the wrong direction.

A key paragraph here is the second to last, about how to break in
unidirectional tires. Rotate them often when they are new.

Ron Atteberry
92 Classic