I get a slight shake at about 70, but nothing either side. I like the Heidenau's but have a lot of difficulty getting them in my part of the world. It's hot here and the roads are not overly tire friendly, most cars chew through a set in about 12-15 thousand miles. With that in mind the TKC's just wouldn't last.
I need to replace my rear K60 as it got a nasty spike through it, came across this post whilst searching alternatives. The front (K60) is new, looking at an alternative for the rear if I can't source the 60 for the back.
Stupidity got us into this mess, then why can't it get us out?