These are our super strong and lightweight kingpin. Graded at 10.9, they are harder than Asian mathematics. Comes in 2” length which is perfect for freestyle. They won’t stick out unnecessary.

Grade 10.9 Kingpin

10.9 Steel, commonly referred to as Bolt Grade 10.9, is a high-strength steel grade. It is classified as a medium-carbon alloy steel, which is characterized by its significant carbon content (typically around 0.8% to 1.0%) and the presence of alloying elements such as manganese, silicon, and sometimes chromium. These elements contribute to the steel's overall strength, hardness, and wear resistance.

The most significant characteristics of 10.9 Steel include its high tensile strength, which can reach up to 1,000 MPa (145 ksi), and its excellent fatigue resistance, making it suitable for demanding applications in various industries.