Last year Lotus was good at managing tires that degraded quickly, i.e. maintaining the grip they had in the first place, while Red Bull chewed through them too quickly because they had such a greater force on the tires through aero. The change mid-season made the tires more durable, but less grip, taking away Lotus' advantage and playing to the aero strength of RB. As I said, best way to reduce to gap between all the cars is increase the tire grip and durability (as everyone as equal potential benefit with a single tire supplier) whilst lowering aero performance. The scenario you bring up from last year is actually a good example of this.
Hm, do you have any reference that the tires had less grip after the change?
If they were only more durable, why would Lotus had lost any advantage they might have had? They had less grip too, which with Lotuses weak aero meant they had hard time even getting the tires to proper temperatures anymore, which is why any advantage they might have had was lost
Didn't think I needed to mention something you already mentioned.
You are lucky he did spin, otherwise you'd have to make up other stuff to carry on your agenda.
Hows did your theory about Hamilton being too scared to pass Rosberg after Spa work out again?
Not if you are listening..Are you talking to yourself?
They did 2 stops, right. So I wondered why Hamilton didn't try a second time.
I don't think we can say with certainty that Ham was faster than Ros at Brazil. Sure, Ham was closing down on Ros @ the last stint, but unlike in other races, Ham can't really do anything with it. Because of that, I think Ros running at a pace that he thinks good enough for tyre life while at the same time can prevent Ham to overtake him. What Ros side didn't expect (and even Ham side!) was that Ham still got enough rubber to do that quick in lap which at the end backfired because they think Ham can do another one which wasn't the case.