Installed 37's on Gen3 35 Raptor - no issues.

[MORaptor1]

Are you saying that's above the 1" that the taller tires provide?

No. They aren’t “lifted” more than a 35 truck. It’s just taller rubber. At least according to all past press releases.

 

[leinad1904]

I want to put the exact tires on my stock 23. Did you have any rubbing before adding your lift? I don't jump the truck but I do go hunting and very mild off-roading. Goal in 37s on stock everything but I do not want the KOs/3s. I need a 3 peak rated tire.

I didn’t have rubbing, but I only drove home and to the grocery store…less than 1 mile total. They looked like a tight fit, I’m willing to bet they would rub if you hit something right with the tire turned.

 

[Raptor404]

With the help of this thread... I got my 37's installed. Several reasons why I did not get the 37, but the main reason was there were none available in white. I had a gen2 with 35's and I loved it.
Anyway, suspension is stock. Put on "R" take off wheels. 8 ply K02's in 37. Currently has approx. 400 lbs on the bed. I should be getting my Dirtbox Genesis camper in a couple weeks. That alone is 550 lbs. With packed gear, I should be pushing 800+ lbs. The truck sits level as is. I am currently waiting for the Geiser rear springs which is on backorder. The fronts were in stock, so I ordered those and if the truck sits ass up with the 800 lbs. and the springs, then I can put on the front. I doubt it however. I found out from Geiser that the Foutz 3/4" perch plate will not work with their springs, so that added height goes out the window.
The 37's (more like 36") does not rub. Maybe 1" clearance on the passenger and driver side, but a ton of clearance to the front. Rears look good. I did the 40 mph over a large speed hump and it felt like butter. Felt better than the 35's. Better than the crappy Bronco Raptor suspension. And I have to concur that for me, the 37's felt more smooth on the road. No off road stuff yet. I do have the Airlift 1000 bags. Would be great if just the Geisers and the caming setup, the Raptor sits nice and level. I have a feeling airbags are only good for time to time use. If my camper sits on the truck 100% of the time, I doubt the airbags will stay consistently inflated