So, are they stock replacement hubs? They should fit fine. if you are going to press them on. use something flat to put as much surface area on the bearing as possible. on my revo I just used my fingers but I am an ogre, so you may have to do something else.
LSP lots of Khz, Werks .28 8 port.
Revo 2.5, TRX 3.3 Engine, Center Diff. Fast and Turns on a dime.