use 2 sets of different tires,one for track one for street and using same rims.My question is do regular changes of tires effect tire life and safety,as switch to track once a month,and should i get other rims if so any recommendations for solely track purpose.Thanks in advance.

 

Yes they can. dismounting or remounting tires can cause
internal damage to the belts in the sidewalls, that cannot
be seen from the outside.
I would definitely recommend separate wheels. I have
three sets. In fact I have a stock set for sale that would
be perfect for the track. PM if interested.
Joe