I have the TF hinge/carrier with the rockbrawler rear and 35s. I didnt adjust the carrier to be completely snug on the carrier (probably a .5 inch gap between the spare and hinge) and it doesn't hit the bumper. If it was completely snug, it would sit flush against the top lip of the rear bumper.
You could always adjust the mounting bolts on the carrier to be at the 37" tire configuration and that'll probably raise your spare higher and it won't contact the rear bumper.
FYI - I did a test fit today with the rockbrawler rearand it fits like a glove. There is no contact with my 35s. However, if I got the newer Rockbrawler II bumper with the 3 inch lip, it would not have clearance and it would hit the lip.
Thanks for the tips! It saved me A LOT of headache
I can confirm a fitment problem between the new Poison Spyder brawler design and the teraflex hinge spare carrier. I believe that I could raise the tire up a notch in the TF carrier and this would allow me to snug up the tire to the hinge, but this will reduce driving visibility. I love the bumper, but wish I would have known about this before I bought, painted, installed (front and rear) and finally smashed my finger!! Hope this helps the next guy...