of course it is up to u, but i havent broken one of the tmaxx shafts in normal use, even in 2wd with the tmaxx wheels and the os 18 behind it. the one that did break, well, i kinda asked for that! keep going with the cen shafts - u will soon have enough broken bits to mod a set of 4! oh and the tmaxx shafts are a lot cheaper to replace when they do break, or if they break...