Tire feathering

[pig tracker]

I noticed today when I was grinding tires for next race, that the right side, both RF & RR, were feathered. Started on the LR and not any feathering; same with LF which I never get much there anyway. Just wondering what if anything this should be telling me. Needs more LR bite? Left side %? (have 53.3% now). Any ideas?

[QQQQ]

You need harder tires

[pig tracker]

Found problem; lost LR bite.