Most stats are pretty self explanatory in this game - however I can't figure out what the concentration stat does for Race Mechanics? Did I miss something obvious?
I'm not sure and not going to play right now, but I believe I read somewhere in the game that concentration helps the mechanics reduce THE RISK % of fast(maybe all) pitstops to offset the constant value. It was probably 1% for each skill level
Concentration
"'Concentration' determines the likelihood of mistakes during a pitstop. The lower a mechanic's concentration , the higher chance of a mistake occuring."