With stock springs and turning to full lock, the back edge of the tire has maybe 1/16" clearance from the fender liner and it barely rubbed the liner after getting a little bit of air time at 65MPH. But I was only off the ground a couple inches.
After the Geiser install I hit a similar jump at 65MPH and got air and they did not rub at all. But thats with more clearance and the progressive springs handled it much better. Need to do some more testing as the spot I like to run it WOT is about 75+ hitting a cattle guard and it gets me about a foot off the ground. I don't go any harder than that so I think Ill be good
All 37s are not the same but I have 8.5" of clearance between the top of the tire and flare lip on the passenger side and 8.1" of clearance on the driver side. Ive read I need 10" to be safe and most guys start trimming if they don't have that