baggedK
+1y
I'll give my $.02
First off- the 2000 Silverado with 20x8 and 35 series tire can run a 5/7 drop quite easily and will look very anaemic with a 2/4 drop.
Our fitments for 20x8 on the '99+ silverado would be 5.5" BS or +25mm offset. The 8.5" will require a 6" BS or +32mm offset. You can run a 10" out back with a 7.25" BS or +44mm offset.
If you plan to run a 2/4 drop with that 20x8... then I'd suggest a 255/50/20 or 265/50/20. Even with a 4/6 drop you can safely run a 255/45/20 or 275/45/20. The 4/6 or 5/7 drop can also run a 245/40/20 or 255/40/20- or of course a 255/35/20 if need be. The wheelwells are huge- stuff em!
4/6 drop with 285/35/22 (30" tall)
5/6 drop with 265/35/22 and 295/30/22 (29.25" tall)
Assuming you're talking about a 255/35/20 at 27" tall, you can see how much gap you will have with even a 4/6 drop when compared to these trucks running larger diameter combos.