JAGUAR BBS RS2 WHEEL AIR VALVE TYRE ADAPTOR INFLATOR XK XKR X S TYPE R BBS RS2 Jaguar XKR Air Valve Adaptor Torque Partz Split Rim Valves Original BBS, Medium Silver Torque Partz Billet Aluminum FV RS RZ BOV Flange Blow off valve Vicedeal 4x Nickel plated Metal Valve BBS Rz Rs Rm Rc BMW E30 E21 E10 2002 (old. A BBS valve stem adapter is a special tool needed to inflate tires on BBS RSII or RS2 split rim wheels because these wheels feature a patented hidden valve stem design that standard air chucks cannot operate. The adapter converts the hidden valve into a standard Schrader (or Presta) type valve, allowing you to use a traditional air pump to inflate your tires. The genuine BBS part number is often 09. 15. 081 or 09. 15. 072 Inflation adapter for BBS RSII wheels Replaces 09. 15. 072