We would not run those tires. ALTHOUGH; There are situations where you should do what best fits your budget. We cut our tires to go 4 or 5 nights at best. I prefer 4 matching tires, same cut, same date code and cut the same day. In the future for guys that change rights, the best thing you can do is to order a full set and an extra set of rights at the same time. Some racers are having tires cut to go ten races or better. The problem is the tires hardens BEFORE you ever get to the best part of the tire, they blue up and roll up, get hard and you never get a tire that will perform at its best. These are just suggestions and certainly everyone does it a litlle different!