Tire tashqi naycha, ichki naycha va yostiq kamaridan iborat.
Tashqi shinaning tuzilishi: 1 - Boncion Crain 3 - 4-chi burka 5 - toj 6 - 7 - elka.
EPDM qisman ichki naychalar va yon tomonda ishlatilishi mumkin.
EPDM: S537-3; S537-2; S505A; J-2080; J-2070; TER 4047;