What do you think about this ? Is It better than RE050 for road and track ? Because for track (for me) the RE050 is not very good.

thank's in advance for your answers

My wheels are 17" (215/45/17 -245/40/17)

 

The MX would be better in the dry but not in the wet. The MX is going to wear quicker and be a little more noisy and not as good for ride quality. If you don't mind giving up these other things to be quicker on the track it would be a good choice. They would be hard to beat for the money.
If I can help let me know.

 

Thank's for your answer Jim. Could you tell me for you what is your tires choice for road and track. Sorry but I want (215/45/17 and 245/40/17) like OEM.

 

Get the MXs in 225/45 and 255/40/17