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.
 These are made specifically for Vespas as the valve is at 90° and straight to avoid hitting the forks.