Rims designed for tubes do not have the safety bead lock hump. This hump keeps the tire on the rim when air pressure is lost.
https://www.google.com/search?q=safety+bead+wheel&client=safari&hl=en-us&prmd=sivn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi1soH7m4_VAhUBxYMKHeU5CFoQ_AUICigC&biw=1024&bih=649#imgrc=shEKnaMK9eLvZM:
Last edited by showkey; 07/17/2017 2:04 AM.