Ubukomezi bwihariye ningaruka zo kwinjiza ingufu zibyuma byifuro biri mubintu byingenzi bikoreshwa mubyuma. Umubare munini wa modulus ya elastique urashobora kuboneka binyuze muguhitamo ibipimo byibyuma byinshi, kugirango inshuro zifuzwa zisubizwe zishobora guhuzwa kandi ibibi byangiza bishobora guhagarikwa no kuvaho. Ubusanzwe uburyo bwo gukoresha ingufu ni buffers hamwe na shitingi. Ibikoresho kandi bikoreshwa cyane muri bumpers yimodoka, buffer zo kuzamura no gutwara, imirongo ikurura ingufu kumashini, nibindi.