Big Wheel BumbagBig Wheel Bumbag Our new Big Wheel Bumbag is perfect for up to 40in tyres and has a 55L capacity. Made from UV stabilized Truck Mesh, it wont hold smells or perish in the sun. Like all of our Bumbags, this dirty gear bin bag is made from UV stabilized Truck Mesh that wont hold smells, grow mould, or perish in the sun like canvas or vinyl. The new Big Wheel Bag fits up to 40in tyres and has a 55 Litre capacity. It has a zipper opening at the bottom