Damaged Rear Tire - Replace Rears or All?

[Calsonicgtr]

So I ran over a bolt on the highway at some point. Rear tire is still holding pressure but its too close to the sidewall to be repaired. Trying to decide between these two options

1: Replace rear tires with two new PS4S for about $640
2: Replace all four tires with Michelin PS AS3+ for about $880

Right now, the front tires are at 7/32". I was planning on going to the AS3+ anyway when the summers run out, as Colorado weather can be extremely variable from hour to hour in the fall and spring. My Stinger is a daily driver and doesnt see anything like the track. Any reason not to just spring for all four right now?

 

[MerlintheMad]

Money and aesthetics (hate waste). As long as the "old" tire isn't well into the final half of treadlife, I see no reason why replacing one tire is a problem, speaking from a handling/safety point of view.

 

[CeramicGT001]

So I ran over a bolt on the highway at some point. Rear tire is still holding pressure but its too close to the sidewall to be repaired. Trying to decide between these two options

1: Replace rear tires with two new PS4S for about $640
2: Replace all four tires with Michelin PS AS3+ for about $880

Right now, the front tires are at 7/32". I was planning on going to the AS3+ anyway when the summers run out, as Colorado weather can be extremely variable from hour to hour in the fall and spring. My Stinger is a daily driver and doesnt see anything like the track. Any reason not to just spring for all four right now?

If it’s too low to just replace one tire like I did when I had 5k miles on the car, I would just go with the all seasons all around.

 

[Fredman]

If the other good 3 tires have lost much tread, i’ve heard it can wear out the differential. I’d go with new rollers all the way around