He has always/only run slicks... these guys had both... and they would switch theirs up... run a "slick" race then run a treads race... slicks could run with treads if you wanted... but treads could not run with slicks...
a very kind guy loaned us a set of rear treads... completely changed the set up of the kart... and he hated them... pushed like a dump truck... I ask him a ton of questions about "why" why do you think it pushed? what do you think is happening? what do you think will help it? why? we have run every race on the same set of tires this year (short season for us) only cleaning and prepping them and changing air pressure for changing conditions... we have been in the ball park and his worst finish is 3rd and only once was he not in sight of the leader... I have kept notes of everything we have done and he gave his input on what he thought we did, needed to have done, could have done, good & bad... I just want his to learn to think about why we would do this or that... before we started I made him find out/learn what caster/camber/toe/ackerman was and to be able to explain it like he was teaching a class on it... long rant i know.... but
I made him give me all the notes from sat. he ran really well when he was on the track with 1 or 2 other karts... nice line... in control... trying different lines... did not run as well in the races... was loose and pushing... very cool that we usually have an hour + ride home... so we get to discuss what we did... cause and effect... he was upset with his racing results... while i thought he did pretty well... anyway it was cool to hear his thoughts on his changes... why they helped or hurt... and I got to question him... why did you add air to the rt rear when you were loose? what did you envision was happening... did it work? out of an hour ride... I can usually engage him for about 30 of it if he is unhappy about how he ran... I can get the whole hour if he thought he ran great... how many dads get to spend this amount of time one on one with their kids... pretty sure i'm the winner no matter how we run