search for my posts on them. surly fixxer is not enough to convert to 120mm because RevX uses sealed cartridge bearing for none drive side. you will need to get a special bit made for it.

Also for the record, it is known why early models failed, if you get a gen3 or gen4 model you will be fine. I posted how to tell in my RevX thread.

Stop with the lies and hate on RevX. They are great wheels