To test it, put about 20 PSI in the tire. Face the side of the wheel and with both hands next to each other, hook your thumbs under the rim (between the spokes), grasp the tire and rotate your hands forward, gripping the tire as hard as you can and try to "roll" it off the rim. Try it in a couple of places. If it stays stuck, you are ok.
Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1