20 inch rims 33 3/4

Hi there I’m new here quick question
I’m buying rims and tires
20 inch rims with tires measuring 33 3/4
my question is do anyone think or know if the front tires will scrape (hit the bumper)when I make a turn

 

depends on the offset of the wheels and lesser extent, width of tires. Stock wheel is +60 offset and with that offset clearing 34 inch tires is no problem, even unlifted.

Less than the +60 offset will push the wheels/tires to the outside of the truck, so the tires could rub or hit the front bumper/splash wells or mudflap.

reply with the offset of the new 20 inch wheels for better assistance, as well as the tire size you plan to run.

 

your main areas of concern are the skid plate and the liners. fortunately there are decent instructional threads on how to grind or bed the skid and how to move the liners ahead so you have more room.
Depending how much rub you get you may also have to cut or outright remove the front flaps.