Re: Anyone using drag radials with a 4 speed?
They work better than street tires, but are not the best choice for a manual trans.
Manuals typically need tire spin to properly launch. The unfortunate part is that radials do not tend to recover from wheel spin as well as bias tires.... meaning on launch the tires spin & do not want to hook back up. Bias tires are better at regaining grip & therefore are the best choice for manuals. On a really sticky track, they may work OK... experimenting is the only way to tell. Good luck.
I know the street manners are way better with radials than bias, so I would prefer them myself if they will work.