Yes, they fit. CJE40 has them on a 2020 FX4. I honestly like them on FX4s better than Tremors (Tremor is just too big for them). The FX4 should come with these wheels and tires and the Tremor with 37s. Suspension is completely stock. I have no idea about rubbing and stuff. They might a little bit in the front but I have heard of people with no rubbing and 35s on stock Super Dutys. Some other people are also running these wheels and tires on stock non-Tremors So I imagine they barely or don't rub unless the suspension is flexed. But they do fit and look great! (worth it IMO even if there is rubbing)
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