H&R Other ::::: H&R Quick-Safe Bolt-Stud Conversions M 12 X 1.5 X 50

To determine the length of bolt that you need, the best starting point is to measure the thickness of the wheel where the bolt passes through it, add the thickness of the bolt, and add the width of any spacer you may be using to that measurement. This result will be the absolute minimum length of stud that you need. In the case of these bolt to stud conversions, in general it is safer to go with a longer stud than this length, as the depth of the bolts going into the hubs, variances in wheel and brake rotor hat thicknesses, and variances in the lug nuts being used may result in a longer stud requirement.