You wanna need to use quite some pressure to get to 100% - so that in most cases you're braking with 70 to 90%.
Do chere na ị ga-ahụ akwa elu ụlọ n'oge ụfọdụ ọ ga-esiri gị ike ime ka ọ dị elu karịa, kwuo, 50% ka 70% nke ngwa ahụ?