I have Zipp 303s hookless rims. I spent hours trying to fit a previous brand tire, which was listed as compatible with these rims. Fitting the previous tire on the rims was extremely difficult and I am still cleaning sealant from the garage when that tire blew off the rim at about 60 pounds pressure. Fitting this tire and filling with sealant took less than 15 minutes. I liked the tire so much that I already ordered two more to have available for future use.
