This is our standard mounted tube for all of our surf racks.

Longboard Racks ship with two 3.5" tubes and one 5.5" tube

Shortboard Racks ship with two 3.5" tubes

E Bike Racks ship with one 3.5" tube and one 7.5" tube

Moped Racks ship with two 10" tubes

Tubes can be cut to length for custom applications for a perfect fit. We don't recommend going shorter than 3"