Your dial in must end with a zero...which does mean you have to dial to the nearest tenth, up or down, your choice.

A lot of these guys are Nostalgia Super Stock racers, and that is the reason for the format. Most of the NSS races on the east coast use that format. It levels the playing field from the professional bracket "killers" out there...and makes it much like the old NHRA National events where you ran off an NHRA class index which always did end in a zero. In general, it forces full passes and discourages brake light contests in the big end.

Thanks for the question....hope this clears it up.