Torker DX?

i got a ? about this uni what is the diffrence between the one with the gray seat and the new with the red?

Year and whatever upgrades from the year of the one to the year of the red/black one. Someone with more knowledge will let you know.

gray ones have a BMX tireā€¦ its not compatible with any of the better trials/street unicycles.
i would go with the red if you buy a DX, but there are better cycles around the same price range.