I am sure you can put shocks on that are a little bigger than the stock shocks. As I mentioned, the stock TMaxx shocks are larger than the original Redcat shocks. But they are also pretty tight. I would be cautious about putting anything bigger than the stock TMaxx shocks like, for example, TMaxx big bore shocks which I assume are even bigger than the stock TMaxx shocks. Since the stock Redcats are smaller than the stock TMaxx, it may be that the Redcat big bore shocks are the same as the TMaxx stocks and therefore fit.