how the Axle Carriers hold up without dust boot retainers

[Mig369]

Hi!

At my Revo these rubbersealings at the Pivot Balls got cracked, now I think about if they are really necessary because they are a bit expensive.
How do the Axle Carriers hold up without these Rubbers?
Will there be many abrasion? And do the Pivot Balls still run smooth enough when theres no protection against the Sand?

I'm driving in rough conditions with many Sand, Dust and some water, should I replace the Rubbers?


regards,
Mig369