Happened to me. Seals on wrong sides. Yanked em out and switched em. Kind of a drag extra step but wasn't too hard to do. Used a big flat blade and gently worked them free little by little. Patience is a virtue on this job.
I dont want to quote weights and talk down warp 9 because for the price they are killer....but....compared to factory ktm behr/smc wheels and excel/talon crf combo. They are much much heavier. No rubber but did have rotors, sprockets and all that....they are heavy! But! Work perfectly until my tube blew out at the track last thursday....oh well maybe defective tube....