Tyre bladder is a kind of tyre mold that used in tyre manufacturing. It is made of butyl rubber and make the tyres cured. Bladder Code Applied Tyre Section Vents/ Etching Type Bladder Dimension Mounting Dimension Effective Periphery LB (mm) O.D. DB (mm) Overal Height HB (mm) Crown Gauge to (mm) Neck Gauge to' (mm) Foot ID Db (mm) Foot Height a (mm) Foot Width b (mm) Please free contact us if you have some requirment of tyre bladder. Looking forward to your favorable reply. Thanks&Best Regards, Michael liu,