Evost Series Back Extension ili ndi mapangidwe oyenda ndi odzigudubuza kumbuyo, zomwe zimalola wochita masewera olimbitsa thupi kuti asankhe momasuka maulendo angapo. Chiuno chotambasula chimapereka chithandizo chomasuka komanso chabwino kwambiri pamayendedwe onse. Chipangizo chonsecho chimatengeranso zabwino za Evost Series, mfundo yosavuta ya lever, luso labwino kwambiri lamasewera. Kupondaponda kwapawiri kumalola ogwiritsa ntchito kusankha malo omasuka kwambiri potengera kusuntha, pomwe zogwirira zambali ziwiri zimapereka chithandizo chowonjezera pakukhazikika kwamaphunziro.