They worked great on the Hustler Sport with seals. I could have added a second regular washer as there is a bit of play but they worked great out of the box. With a 3/4" hub diameter it worked great, pull the 5/8" hub out of the Hustler wheels and they fit snugly, they also hold the spacers well when reassembling. My DSLRs have been intact and held up well to lube, but even if you have to replace them with new ones at the hardware store for $0.35, you can't go wrong. I looked at the ones with 5" hubs and considered cutting them off, but that's a lot easier, hopefully the plastic spacers will hold up. The ride is probably a little rougher, but I got tired of pumping up my tires. "I changed the tires and even put tubes in them and I still get flat tires. Unless you're mowing in the prairie dog village, the slightly rougher ride is WELL worth the convenience. I've only mowed them a few times so remains to be seen how they hold up, but so far so good!