I don't think you could be running 55ets up front unless you are somehow running a rear wheel on front???
Not that running that et is
bad for the front if that's what it takes to fit... I'm basing all this from my Gemballas I had, the fronts 18x8.5 were et47 and the rears 18x10 were et52.
You might keep an eye on those Kinesis, could be a bargain if you can stretch the budget a little
...
Jeff-