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When should I replece both tires? Should I flip front and rear tires as well?

1.8K views 11 replies 6 participants last post by  Bitter  
#1 · (Edited)
I have a 2008 Highlander AWD SPORT. My wife recently drove the car and got a flat tire(rear-passenger side). But seems she noticed too late and tire is bad now and I want to replace it with a new one. I have 2 questions:

1. Should I replace both rear tires? It seems the old tires still have around 5mm tread on them(I didn't measure it accurately).
2. If I replace both side tires, should I put new tires in fron or rear axle?
3. Is it safe to replace both tires with myself? I mean does it have any special trick or it's like replacing bicycle tires(even easier as it doesn't have tubes).

PS: I have an idea that I am not sure if it is a good one. I want to buy a new tire and put it in place of the spare tire (just for emergency reasons). Then I will keep the previous spare tire under the car for a few more thousand miles, and when I see the other three tires worn out enough and needing to be replaced, I will buy three more similar tires and also use the other one that I used as a spare. I will then keep the best tire under the car as a spare.

It seems the previous spare tire has been worn out somehow, and it looks similar to the other three tires. Although the only problem is that it is from another brand!






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#4 ·
You said 5mm left - along with Should You Replace All Four Tires on Your AWD Vehicle? - Les Schwab I would get four new tires for an AWD.

Even if it's a FWD, you'd be in the situation of two tires always have more tread that the older two.

Would be interesting to know what the tread depth is on those tires when brand new - you can find out on TireRack.com , etc.
 
#6 ·
I would replace the flat with an used tire from one of them used tire shops until the other tires are worn enough to replace them all together. I don't think it is worth replacing yourself but you can decide for yourself after watching some utube videos. Tires still need to be balanced.
 
#7 ·
Hello Freeman, I am an auto technician and the flat tire need to be replaced since the rim rubbing against the sidewall compromise the tire structure. Usually is good practice to change tires in pairs depending on the condition or wear on the other tires. If the other tires has a lot of treads just change the one for a new. If the treads are like 5 as you said get a good used one for a little longer. This way you don't throw away a good healthy tire. Then change all tires that are measure 3 or less. Also a lot of tires has indicators on them letting you know when is time for new ones. Oh, unless you have a tire and balancing machine I suggest don't risk yourself. Good luck and be SAFE.
 
#10 ·
Thank you so much! I checked out all the other tire treads, and it seems they are all pretty similar. I have an idea that I am not sure if it is a good one. I want to buy a new tire and put it in place of the spare tire (just for emergency reasons). Then I will keep the previous spare tire under the car for a few more thousand miles, and when I see the other three tires worn out enough and needing to be replaced, I will buy three more similar tires and also use the other one that I used as a spare. I will then keep the best tire under the car as a spare.

PS: It seems the previous spare tire has been worn out somehow, and it looks similar to the other three tires. Although the only problem is that it is from another brand!
 
#11 ·
I get my tires at Costco. Their warranty's unbeatable in my opinion and they run sales on Michelin and Bridgestone, as you may know, switching manufacturers usually monthly. They may have to special order the tires for you. Just my two cents but as Luis Ki mentioned earlier buy two if you aren't doing four. That's what I do and I am no expert.