taller than stock tires

[stangguy]

Here is a pretty good site that shows the differences between your OEM stock size vs. any other tire size you enter. Scroll down and it "tells" you what pros/cons performance traits you might encounter with a different size.

I was recently looking at alternative tire sizes for my Patriot's 205/70R16's with limited brands/models available.

https://www.wheel-size.com/calc/?wh...65-16X7ET44&fcl=50mm&scl=50mm&wcl=30mm&sr=0mm

Looking at the chart, I think the wheels and tires I am thinking of using will work,. The only difference being a slightly negative (8mm) scrub radius. I am not familiar with that spec. What will that do to the handling/tire wear?? I do NOT race the car .

 

[Quattro Pete]

Ok, so I have a chance to get a really good deal on 4 almost new tires for my 1998 mustang V/6. The only thing is that the size is about 1.5 inches taller than the stock size. I am wondering if that will be a problem gearing it up that much. I know the speedometer will be reading slow, but that doesn't concern me. Just wondering if my low power engine and automatic trans is up to it?? Sometimes I drive on hilly roads, not mountains but some pretty good hills.

It would be helpful if you mentioned your OEM/stock tire size and the new tire size.

 

[mightymousetech]

Looking at the chart, I think the wheels and tires I am thinking of using will work,. The only difference being a slightly negative (8mm) scrub radius. I am not familiar with that spec. What will that do to the handling/tire wear?? I do NOT race the car .

Increasing the scrub radius 8mm further negative can increase tire wear as the toe will change more as speed increases, as it will increase the force trying to turn the wheel. It will also cause an increase in pulling left/right on uneven pavement. 8mm is not a lot, some cars it will be very noticeable, some cars you will hardly notice it. Would feel similar to adding an 8mm wheel spacer. I have had several cars to diag where the customer was complaining of "scary handling" on BMWs. Then I notice they have wheel spacers, removing the spacer fixed it.

 

[IcarusLSC]

Ok, so I have a chance to get a really good deal on 4 almost new tires for my 1998 mustang V/6. The only thing is that the size is about 1.5 inches taller than the stock size. I am wondering if that will be a problem gearing it up that much. I know the speedometer will be reading slow, but that doesn't concern me. Just wondering if my low power engine and automatic trans is up to it?? Sometimes I drive on hilly roads, not mountains but some pretty good hills.

1.5" taller most likely will hit the front upper control arms at least, who knows in the back...

 

[meep]

That’s a fairly noticeable change for a passenger car. They will be heavier and the chassis will shake a little more over bumps with the increased weight. It’s going to float a little and the steering will feel a little less connected. @mightymousetech is absolutely right. Scrub radius changes can do weird things. Too much one way and the vehicle will pull into obstacles, requiring more correction at the wheel. Too much another and it will countersteer away from imperfections in the road, which is a very unnatural steering feel. The car may try to dart left and right under braking. I dont know mustangs well enough to provide real experience, but have changed rims and tires on 4x4s enough to have a developing feel for what’s in-limits for me and what’s not. 3/4” radius increase on a sedan will be turning the stang into a Subaru Outback sedan. Tire rack advises keeping scrub radius within 5mm of stock, for instance, when upgrading wheels and tires. You will notice 8mm, though it may not be that bad. If I wanted that much increase, I’d probably increase rim diameter by an inch as well to prevent it from wallowing too much, knowing I may have to buy something else if I didn’t like it.

all in all, I’d wait for a better deal on a closer size.