Top Kart manufacture one of the most used axles in the Mini Kart class. Most top kart brands have a Top Kart Blue or Top Kart Green axle in the rear of the kart when they win.

Top Kart make there axles to be 950mm long. This is Legal as the rule is 960mm /-10mm.

When you this axle with the you run the hub flush with the end of the axle, this will be exactly 1100mm (Maximum width).   

Top Kart Blue Axle: Medium (48kg)

Top Kart Green Axle: Hard (65kg)