The re050's have a couple of varieties I believe. RE050A "Pole position" is one if I remember and are for ultra high performance with very good grip but as a downside will have a high wear rate, whereas I think there is also another variety but just called the re050A (not Pole Position), and there is also the RE050 (without the "A"), which I think doesn't quite give as much grip as the pole positions but has better wear rate but better grip than the oem re040's (which have the best wear rate as they are harder compound) but not quite as good a grip. I've heard the re050's have a softer sidewall meaning you would lose a bit of feedback but not sure on this. Will be interested to know how you find them.