I thought I looked at E3's before, and did not find the same rear size (180/55R17), in a radial.
Close sizes - 160/70-17 and 200/55-17 - but both still Bias ply.
Do they make a Radial in the same size? I can't seem to find it.
I use E3's regularly on my Legacy 2000 Valk - and usually get real close to 10k out of the rear, a bit more on the front.