I am looking to put 35's on 2021 AT4 HD and was initially going to order a Cognito kit but lately I am undecided. I personally think with the 3" lift it needs 37's to fill up the wheel well. I have seen a couple of forums where people have put 35's on and gone up 1/2" or so with adjusting their torsion bar keys. I am just not sure how hard on the ball joints, etc. that 1/2" of adjustment would be without the longer control arms... Looking forward to some more comments on this thread on it. Cheers.