The more important point is that the wrong size of tire can show that your car has more miles on it than it actually has. A smaller tire over 6 years can really mess with the odometer. Not to mention this throws of your service schedule. Oil changes etc. I guess you could put larger tires, notate the difference so you don't speed and keep your cars mileage low. lol. Thanks for the video.

+1” tire height (roughly) = 2 mph actual speed over the gauge. Great geek work, thank you!!!

Tire lesson and math in one video, brilliant !

I know for a fact that he didn’t mention was that by going 1 in more higher makes the ride more comfortable because there’s more rubber to absorb the road p.s.I went from 235 60 18 to 235 65 18, much better ride

I think the more concerning issue is how the tire size affects the longevity and performance of the car, in my opinion.

I've totally learned something new. Thank YOU!!!

Hey, Thanks for checking out the video. I hope you liked it. Feel free to ask any questions you have and leave your thoughts or feedback.

Why is everyone blowing off about the speedometer readings!? There should be actual talk on upsizing on the same rim with handling issues and clearance etc.,

Very precise and informative video

This is teaching. Clear and simple

Nice to see your method of displaying the calculations.

Damn never thought I’d use math from school cool

Thank you for this, I was just advised to put 195's on my car that should have 175's to run better on an unpaved road I have to travel daily. Immediately realised as I drove off the xtra effort it takes to pull away, not a lot, but still. So by his logic it would also mean that a car would have less miles on it's tachometer than it actually travelled if fitted with bigger tyres, right?

This is good stuff, BUT just the tip of the iceberg as many here are here because we go with larger tires because we're modifying our vehicles to perform better off road and we're curious how to manage the differences with MPH, fuel economy and power..... For instance, I have an '04 AWD Astro van I converted to 4x4 with an s10 transfer case and I have a decent lift on it. My tires are now about 2" taller than stock and my speedometer is off 4mph... There are charts out there that point out the relation to tire size, gearing and rpms - There are "sweet spots" to aim towards, for instance, according to what I've seen you can get better gas mileage but have a loss of power at the same time.

How about the tire size I'm using at the back 215x60 R17 and in the front 225x60 R17, Is there any effect on the performance of the engine car? Please give me advice. Thank you!

Thanks for sharing with us about this..... I just bought the wrong size tire ...and I will get a close look about the speed

I had to put slightly smaller tires on my truck. I just drive it around town, in light traffic, doing errands, so I think everything's ok.

Dose it effect milage ? Fuel economy ?

What about tire compression under vehicle weight. I think an inch higher in height(side wall) would in reality not be up to an inch because more sidewall means more compression under weight right. I hope someone can help me out on this

Got a BMW 335i. Went through 17 tires in a 3 year period. Therefore, I had zero confidence in the reliability of the vehicle. Well, ironically enough, I garaged the thing for 2 years bc I was sick of driving somewhere, blowing out a tire and then waiting for AAA to come give me a tow bc the vehicle has no spare. Well, after taking it out of the garage recently, I realized that the back tires (which calls for a larger width) was the same as the front. So these dipsticks at NTB we’re sticking on the wrong size for 3 years. No idea how I never caught that. So, shame on me for trusting someone else that should know their job.