Go Kart Axles Racks by Streeter MFG. These racks are perfect for any kart trailer, and can carry either 6 or 12 axles!
Overview
Manufactured out of high-grade aluminum and welded with strong gusseting, the axle racks are ideal for carrying your go kart axles in comfort with rubber grommets and padding on the underside of the rack to prevent scratching or marring of the axles.
The axle racks are designed to fit to the wall of your trailer, and come in either a single or double-row.
Each hole is designed to hold 1.25", 40mm, 50mm axles well. 25mm and 30mm axles can be held but likely will jostle around a fair bit.