Bias vs Radial slick

[Mike Rietow]

Originally Posted by Chris1529

I have 28 x 9 M/T Bias slicks on my car right now. If I switch to a 28" Radial, can I expect much finish line RPM difference? Anyone have any finish line RPM info they can share when switching from Bias to Radial on the same size advertised tire on?

The bias has high energy losses at all frequencies (deformation). The Radial will have low energy loss at low frequency which means less resistance to roll. Less rolling resistance means more mph. More mph requires more rpm. How much more rpm? ... How much more mph?