The Regulator Fork V3 is now already equipped with a Disc Brake Mount. So there is no need to buy an additional Disc Brake Leg for the Regulator Fork V3.This one of kind Girder Fork is a master piece built by Ruff Cycles. To get the right strenght – weight ratio we used CroMo (Chromoly) Steel. The spring is changeable to adjust the rake angle.With 15mm the metal struts of the fork are strong enough to ensure a safe ride while an earth quake.The sizes are the following:Length Bottom to Top: 680 mmLength Headtube: 300 mmWidth Fork: 140 mmInner Width Dropout: 100 mmHeadtube Outer Diameter: 1 1/8″Length Spring: 213mmAlso we have an Regulator Fork Extension Kit to ensure that 100mm Rims fit!