I have a 2019 regular cab it has the 17x7.5 rims and I wanna put 20x10 on it but I don’t know what offset I should have

 

4WD? RWD? Stock suspension? Leveled? Lifted? That all plays into what fits and what doesnt.

https://www.customwheeloffset.com/wh...-150&drive=4WD

You can drill down the search if you answer the questions on their site.

 

These wheels are 17-8 with 0 offset. 2/4wd use the same wheels and most stock offsets are 44mm and a few 34mm. My wheels come to the edge of the fender so a 10 inch wide would be an inch further on both sides. The tire size is the limiting factor. I have a 1.75 level on this 2wd and it is as high as a stock 4wd. A 285-70-17 tire 32.8 inch tall will clear(my son has these and I checked his for clearance), shown are 275-70-17s. KM

 

My recommendation is to leave it stock.