regards radials . Get a decent double rear shock , Viking does a radial valved unit that is what I have . With 123mph should be high 10s . My Ranchos lost control around 11.20s .You have to hit those suckers hard and hold them . I have run MT and Hoosier radials , never had a rag slick on it . I use the mt Probracket radial nowadays . Far more forgiving . Crap track is not your friend even with PBRs .

Tex