AWD and tire replacement

[Bob zimmerman]

But pay for a new set, what do I know, I'm just an engineer. Tire diameter changes more when the sun hits your tire so just replace one side for half the cost, if you drive South to work put the new tires on the passenger side, if you drive North to work put them on the driver side. On cloudy days work from home.

Engineers designed the 24 and older axles and the back-up camera For starters.
And I’m pretty sure you are just pulling his chain about tire replacement. Your response is almost as worthless as mine.
Bob

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[jpj]

Hello Everyone: I need some advice here. I have a 2025 Maverick AWD Hybrid. I had a flat tire today where the tire is destroyed. I have 7500 miles on the tires. The tires are Cooper Discoverer Road + Trail. I was wondering if I could replace the one tire or should I replace all 4? I do not want to damage the AWD system with different tread depths. Is there a rule of thumb with Ford’s AWD Systems with tread depth variation. I had a subaru where this happened around the same mileage and I had to replace all 4. Thank you in advance for your insight.

I would use it as an opportunity to replace all four. Tire Rack surveys can identify the best tire for driving needs.

 

[notfast]

Hello Everyone: I need some advice here. I have a 2025 Maverick AWD Hybrid. I had a flat tire today where the tire is destroyed. I have 7500 miles on the tires. The tires are Cooper Discoverer Road + Trail. I was wondering if I could replace the one tire or should I replace all 4? I do not want to damage the AWD system with different tread depths. Is there a rule of thumb with Ford’s AWD Systems with tread depth variation. I had a subaru where this happened around the same mileage and I had to replace all 4. Thank you in advance for your insight.

I would measure the tread depth and decide from there.

Keep in mind the "full size" spare (215/70/17) is actually 1.2% larger in diameter than the road tires, whereas the mini spare (155/90/17) is 1.9% smaller in diameter than the road tires, so the AWD system can't be so fragile that putting one of the spares would blow something up. If anything, the spider gears in the diff might be rotating very, very slowly when going straight down the road, but I would call it negligible at best.

I could imagine that if the tire size differential were too great, you'd get some sort of an AWD fault warning shortly after getting one tire replaced, such as the AWD system being over temperature or not available or ABS or traction control not available.

 

[Shawn]

Engineers designed the 24 and older axles and the back-up camera For starters.
And I’m pretty sure you are just pulling his chain about tire replacement. Your response is almost as worthless as mine.
Bob

There are good and bad in any profession. Yes, everything past the useful advice of measuring the depth was for my own amusement. Using real data and numbers is great advice though, best to make decisions, especially financially impactful ones with facts and data.

 

[HeyBales]

How often should I have the circumference checked to verify my tires are still within limits?

OP - several comments have hinted or stated at the idea behind this question.

That there is more variance that happens naturally that is never cared or accounted for.

Like what if you check your tire depth at 10K rotation - and due to FWD being predominately used - oh no there's a mismatch with more wear on the front tires!

Time to replace all 4 tires every 10K because of uneven wear?
I'm betting half the posters saying replace all 4 wouldn't even do that.

Shave the new matching one if really concerned.

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