I have these tires on the rear of my 2 wheel drive Colorado. This truck does have the locking rear differential. This will be the third winter I have run them and they still look new. We put them on in November and run them until May. From here on out, I think I will run them year round. These tires are GREAT in snow. I was able to plow through a drift created by a snow plow while going from a side road to a main road. A front wheel drive car was stuck to my left and a full size Dodge truck was stuck on my right. I had to come to a complete stop at the light so I had no momentum when I hit the snow plow drift. These tires pushed me through the drift onto the main route. Another time I was hunting and took a wet sandy/muddy trail back to a remote parking lot. There was another guy back there with a 4x4 Dodge Dakota. He couldn't believe I got back there with a 2 wheel drive. He said he struggled to get back there in 4 wheel drive. These tires have exceeded my expectations in both tread wear and traction.