Does anyone know how big of a tire you can fit under an 06 Silverado Z71?

Dont do it!!! the whole Monster Truck thing went out in the 80s. It will handle bad, look stupid, get Horrible Gas mileage, and most importantly, your lady will not be able to get in it while wearing a skirt! If you do decide to go with Big tires...be sure to grow back the Mullet and hit the thrift store for some Parachute pants!

If it has factory suspension with 16 in tires a 285/75/16 should fit. if a 17in tire probaly a 285/70/17 will fit.

you can go practically any size my husband had a 70's model chevy stepside with 44 inch swampers under it just may have to lift it with certain heights and widths just depends on how tall you want the truck to be. they always say higher the better that is what sold our truck when we put it up for sale. just about everyone likes tall trucks

oh no dont you be putting new chavvy tires on a chavvy car you will look like a chav