i use stud extensions on mine and i know of a few other ppl in this forum that uses em also and i havent heard of any of us having a problem yet, i ride pretty freaking hard and nothing has come loose, twisted or broke yet....knock on wood !!! BTW..not all year shee axles will work and the ones that do will only give you two inches, not really worth it , im my opinion, if y areally dont trust spacers than shell out some doe for a dura blue...