I got a set of old ultra tacks from a friend and the runners are trashed. Not sure what year they are or what steel to use for replacement, if they even make anything for them anymore, holder has 1979 on it but not she if that is production date or not. They are size 9.5. Want to have my oldest boy use them as he's never skated before. I'll attach some pics when I figure out how...lol.
J
https://m.flickr.com/photos/jeremy_pelt/31176221883/