I installed these spacers on my 2019 Tundra. I kept my stock wheels and also added a 3 inch alignment (lift). I wanted to push the tires evenly or slightly over the edges of the fenders. These spacers were the perfect size. I had a problem with that. I wasn't happy with the length of the lugs in my stock front hubs. I ended up buying longer studs (Dorman 610-471 Front 9/16-18 Tooth Wheel Stud) to replace my front studs. They were fairly easy to knock out. Take out the standard studs and screw in the 9/16 studs with the eyelet. I was then able to add a spacer and use the standard grommets to mount the wheels. The rear tabs were slightly longer and had plenty of thread to hold the spacer. I might get by with the stock front, but I feel a lot better knowing that I have longer lugs and more spacer retention threads. I used Loctite and tightened to spec. So far they've been great; Questions.