18" wheels

I have a pair of Technic 1210's without lids with Original Slip-mats.. and a record bag full of Hip-Hop Vinyl.. I am considering swapping them for either :- A) a pair of RECARO/COBRA/GTR Reclining Bucket seats + mounting kit for R33, or B) 4X 18" Wheels and Tyres (with good tread) ready...