How many ice screws should I put in my tires???

[mc1984]

I am getting ready to hit the ice here soon. I started putting my ice screws in tonight. I was wondering, how many should I put in??? I dont want to put in to many or to little. Any advice would be great!!! Also if anyone has any pics that would be greatly appreciated!!!

thanks in advance,

[xsr_racing28c]

i have 277 in each front and 422 in each rear ... common rule is two screws per lug.. only put screws on those that are going to contact the ice though, otherwise its a waste