what kind of 20's? for a set of 17's and 300 you may get 20 inch rims with no tires. my 20's were $900 plus tires which are $185 a piece and thats my cost where i work retail tires are $200-$220 and rims (solids) are $1200 and up but spokes are usually around $500 a set plus tires. i may have a set of spokes for you.