i looked at the picture in the manuel to figure out with was the left...cause they had to left ones on it when i got it and i think that is probly why the right one broke so easily cause i didnt really do any bashing with it when it brok on me....but i noticed it handles better with them...and then i also put new traxxs tires on it and does even better....the original wheels that come with this truggy are junk...