Review on Marrkey 12mm Carbide Screw Tire Studs for Enhanced Traction on Snow/Ice - Anti-Slip Spikes for Car/Snowmobile/Tractor/ATV/UTV/Motorcycle/Short Lug/Bicycles/Shoes with Easy Installation Tool - Pack of 100 by Matthew Flores

Sounds like a good idea to do it myself, I'm pretty handy. I took measurements and found that 12mm would fit, but not for a small car. I went ahead and installed them, they stick out too far and despite being threaded they don't sink into the rubber tires. Most importantly, 100 spikes do not complete a tire. This gave me about 3/4 of the tire's full circumference, and no, I didn't go crazy putting a stud every inch or so. I spread them out evenly like a shop would. Could it be good for shoes?