>The Champ used 8.00 by 4s, but they had cabel operated brakes. Actually I >think a lot of old planes used them. I can't remember offhand if the >t-cart I used to fly had 'em or not. These are hydraulic. >It doesn't matter so much what they came off of. Many planes used off the >shelf wheel parts. What you need to find out is what model of wheels you >have. The rubber doughnut model was a goodyear design I think. Don;t >know who did the cabel breaks on the champ. I hear people talk about >putting a "Cleveland conversion" on cubs. That may be what you have. Is >there a manufacturer's mark on them anywhere? Not that I can find. Only marks on them are the numbers 1 and 2 used for alignment. >have you looked at the exploded diagrams in places like the Aircraft >Spruce catalog to see if it looks like what you've got? Yes, including Univair. The only one I can find that is similar is in Univair. It's an early Cleveland, but it's made for 600X6. What I probably need is to get in touch with a "senior" mechanic that would be familiar with all the older type wheel/brake systems. Thanks for you help and if you think of anything else that might help figure this out I'd appreciate a note. Later, Darrel