I have always run 6" of carbide on my 1200.. The sled came with 4"(I put those on the outside) I like the bergstrom triple points and decided to try the 4" this time. I think the sled has enough weight on the skis where 6" isn't really necessary especially with a non studded track. I hope I'm not disappointed. Anyone else running just 4" of carbide ? I'm riding tomorrow w/ the new skegs and I guess I'll find out.