Mr. Black

Guys I tried to search thru the site to see if I could get any help on my tire selection but I didn't get the info I was looking for. I already have my rims picked out which are 20"x8.5. I want to get the Falken GRB-451's which are sized at 255/35/20. Would this be a problem? Does anyone here have these tires? I know most members of this site that have gone with the 20" rims have used the 245/35/20 tires. Anyone who can help please let me know if this would be a problem.