I'd like to chip in with my recent experience, which all speaks to the point that tyre choice is super-important on these cars. So, it's a TF160; when I bought it one of the rears was in poor condition, so I immediately changed them both as a pair for Toyo Proxes TR1 (215/40R16). The fronts were existing Toyo Proxes T1R's (195/45R16), with loads of tread on them (although date stamped 2015, so 5yo). The car never really felt right in a straight line at motorway speeds (>60mph) - it didn't pull to either side, but it was light and often felt like it wanted to suddenly get wobbly. I did the due diligence on it - made sure the pressures were correct and maintaining that pressure, suspension parts checked for play, front tracking checked, and I couldn't shake that uncertain feeling at speed. Of course, I'd read loads on the forums here, and I kept coming back to the tyres, but it felt wrong having to replace the T1Rs with awesome amounts of tread on them. Eventually I convinced myself that thre was nothing for it; I'd just have to spend the money and find out. What. A. Difference. It feels stuck to the road now. The takeaway is - if you've crossed off all the common-cause things off the list, it is real. The wrong tyres, or mix of tyres, can make a world of difference. I was skeptical too - it's my first TF - but I'm 100% convinced now. It seems obvious with hind legs - look at the thread patterns below! - but I did have to take a bit of a leap of faith on it - paid off. For the record, because I know this is a thing too, the rears are Japan and the fronts are Malaysia - just what I happened to get, although both same tread pattern and new, obviously. The first (asymmetric) pattern is the TR1, the second (symmetric looking one) is T1R