FOR FULL TREE RACERS
This question is easier to answer than you think. (NO measuring
of front tires, and NO weight calculations).
Let's
first assume you are racing on a .500 (5 tenths) Full Tree, and reacting to the
bottom amber. The rollout to begin with would be about .325. Tests have
shown that when tested, people could react to the bottom amber on the .500 Full
Tree, and have a decent reaction time with this rollout. If you try to
practice with no rollout you should come up with a reaction time between .160
and .190: from that we can take an average of .175, so...
.500 (Actual
Reaction Time)
-.175 (Human Reaction Time)
.325 (Roll Out)
The correct
way to practice is to react as soon as you see the bottom amber go on. It MUST
be a reflex. If it isn't, you will never be consistent. Trying to
learn that, will be virtually impossible and very inconsistent. So, if you
practice at .325 (or between .300 and .340), and get your reaction times in the
consistent .510 to .530 range, you have reached the goal with the practice tree.