Clarification on Acceptable Studs

We’ve received a lot of questions on what kind of studs are allowable and which aren’t. Please refer to the photos below as a guideline prior to studding your tires.  We have updated the stud rules to include threaded bolt studs with nylon locking nut in addition to traditional screw in studs. Examples of each are shown below with a clickable link to our exclusive stud sponsor, Kold Kutter screws. Note that we will not allow a stud head height greater than 5/16″, whether you choose a screw in or screw through nylon lock nut.  Also, no spikes, sharpened bolts or other “home made” studs will be accepted even if they are < 5/16″.  If you still have questions about studs, we encourage you to contact Randy at Kold Kutter and he will be happy to answer your questions and guide you to the right stud and stud pattern for your tire.  We will also be publishing some best practices for studding in a race such as this but in general more studs does not mean more traction – there is a delicate balance to finding the right amount of studs per lineal foot of tire and too many studs will cause a “skating effect” where none are grabbing.

ACCEPTABLE

ACCEPTABLE

ACCEPTABLE

NOT ACCEPTABLE
NO CHISEL HEADS, HEX HEDS OR HELLCAT HEADS ALLOWED. NO HEADS HIGHER THAN 5/16″

NOTE: Due to the length and top end speeds in this race, drivers should expect to shed some studs and as a result we strongly encourage everyone to wear appropriate chest and eye protection to guard against all possible race debris including ice chunks, sleet/snow and tire studs.