I currently have eagle F1 front and back, however one rear is starting to crack and I want to replace. I want to change to pilot sport 4 but The front tyres are only 8 months and can't justify 4 new pilots

i know that I definitely need to replace both rears with pilots but will I be OK running F1 on the back and pilots on the front?

 

yeah it will be fine.

 

Thanks buddy

 

the problems happen if the tyres are different sizes, or a big difference in the rolling radius.

 

This is the cracking I am talking about, both on the shoulder and in the tread grooves.