Tires without "gaps" just pack with snow and turn into skis, adding any reasonable amount of weight can`t overcome this. Weight is a good idea, but the best results per dollar, come from tires. JMOyes i have stock tires on my 222. i was planning on buying 2 link v bar chains for the rear but i'm worried about steering. I want to ad extra weight to help. .
The pic I posted above are tri-rib on wide front rims. Here is a better picture of the tires on my buddies 312.StS25
Do you have a photo of the mounted 8" Rims I was thinking a narrower wheel path.
I don't have mine mounted and can still either way