So I'm getting 3 inch lift spindles on my 2001 Silverado and I'm trying to find the biggest Tires that would fit on stock 16 inch rims. any help?

 

Welcome to the Forum Johnny,

Need a little more info on your project...
Largest sizes depend on what type (duty) you want...
ie: Street, OTR, Brand...


http://www.miata.net/garage/tirecalc.html

 

285/75/16 will be about biggest you can go

 

There are even larger width tires which are made for 16" rims, but...
When doing this, it seriously displaces the alignment of the sidewall
Results being very sloppy control, and a loss of load ability if one reduces
the air pressure to get more even wear on the tread.
You would probably be better off by just increasing the Profile only.