Biknd Helium V4 travel case. I bought this for my road bike, but it will hold gravel and mountain bikes (depending on the bikes length between the axles). I’ve flown my Stumpjumper to BC in this bag. This case rolls up (120cm x 45cm) for storage. It will carry two wheelsets plus your bike. The inflatable bladders protect the bike and wheelsets. Includes adapters for common axle sizes. Weighs less than 20 pounds empty.
$250 obo