SecondAir is the latest inovation in pneumatic beadlocks, holding both inner and outer tyre beads onto the rim and having a separate low profile tube to inflate the beadlock.
Each size is colour coded to identify easily what rim it is specified to. The 16.5" x 7 - 8" is red / green.
An easily installed special valve is fitted to the normal air valve hole to inflate the tyre. Now you have 2 separate air pressures, allowing you to control with confidence the pressure you wish to run in the tyre.
SecondAir weighs less than 1.5kg each and being distributed completely over & around the rim while being inside the tyre presents no problem with wheel balance. Being inside the tyre the SecondAir is unaffected by weather or damage by rocky terrain.