20s with 275 55s on our truck? with and without drop

[sir_talk_alot]

Buddy of mine might be getting new wheels for his truck. He is gonna make me a deal on his 20in akuza wheels. Im curious as to what tire size is best on our trucks. Ive got stock ride height, but i want to lower it 2/4, possibly 3/5. Will i rub with 20s with 275 55 20s? Like to know before i make the deal. they are on his 05 sierra. Id imagine stock ride i wont. But worried about it with a drop. Opinions and experiences please! Maybe pics with these tires on trucks and post your ride height.
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[6772owner]

My opinion is you need to know the wheel width and offset (back spacing) to determine the fitment on your truck. I would also verify the bolt pattern, I dont believe the 05' Sierra bolt pattern will work on the 67-72's w/o adapters. I personally run a 255/55/18 on my truck with no clearence issues, Im on air, but its rougly a 5/7 drop at ride height... just my .02

[sir_talk_alot]

My truck is 6x5.5 & His truck is 6x 5.5 i was gonna do 17s with 60s but i thnk 20s would look better.
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[6772owner]

I apologize, I was thinking 2wd (5x5), I would just check the backspacing/offset and the wheel width then. You could also talk your buddy into letting you test fit one to verify how close it will be when lowered...

[Dingfodgy]

Also- I think the late model 6-luggers have a smaller center hole then our trucks, plus the fact that more than likely your buddy's rims have a pretty high positive offset which will make them look a little goofy without some spacers to get them out where they belong.

Like mentioned above- take some measurements and do a test fit before committing.