BGM inner tubes are manufactured according to their specifications and are made especially for the needs of Vespa and Lambretta scooters. The butyl content is over 50%, which makes them extremely airtight and absolutely reliable. The high butyl content makes the hose expensive to manufacture, but in their opinion the result justifies the effort, and are still cheaper than the Michelin equivalent.
 The valves are vulcanized in the specific position for either Lambretta or Vespa. These are made specifically for Lambrettas as the valve is still 90° but, like the original Innocenti type, it is off-center at 45°, So there is no contact with the fork link bolt.