Odd tire size

jeffdawgfan

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Has anyone with a premium (19 inch wheels) put 245/55 size tires on the stock rims. Wondering how this would work...Just hate to spend an additional 2-3K for new wheels for a little wider tire. From what I have read this is the maximum size for the stock 7.5" width rims. This will add just under a half inch to a new tire.
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Has anyone with a premium (19 inch wheels) put 245/55 size tires on the stock rims. Wondering how this would work...Just hate to spend an additional 2-3K for new wheels for a little wider tire. From what I have read this is the maximum size for the stock 7.5" width rims. This will add just under a half inch to a new tire.
OEM Premium wheels are 7” width rather than 7.5” iirc. I believe others have done 245/50s, which are close enough in circumference to the OEM 225/55s that the speedo error is very minor. Don’t recall if I’ve seen comments on 245/55s but I’m sure someone has done it.
 

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On my Premium eAWD ER I put the 245/50RZ19. The revs per mile are 724 & 723 (one is OEM tire and other is the 245. I used the Continental ExtremeContact DWS06 Plus which is rated as a 105Y in XL load. Very pleased with them.

B2517D1D-893C-47C4-9C49-598D0BCC511F.jpeg
 

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On my Premium eAWD ER I put the 245/50RZ19. The revs per mile are 724 & 723 (one is OEM tire and other is the 245. I used the Continental ExtremeContact DWS06 Plus which is rated as a 105Y in XL load. Very pleased with them.

Ford Mustang Mach-E Odd tire size B2517D1D-893C-47C4-9C49-598D0BCC511F
This is the exact tire I was looking at and according to the tire site would fit. Any impact on your range?
 

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This is the exact tire I was looking at and according to the tire site would fit. Any impact on your range?
Probably but I can't really quantify. It is likely very small. There is a post from some science nerd that stated this change is minimal and that we were likely to take a bigger hit if we swapped rims. This car handles excellent with these. And they flat out look better than the OEM tire. Read the ratings on them at Tire Rack. The best all season UHP (Ultra High Performance) tire. I did not want to change rims thus, these are the best option. Very quiet.
 


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Whatever you replace, consider a tire airy Eco focus, which typically is rated for low rolling resistance. This helps range degradation.

While I love the Continental DWS 06 plus, they are not an eco focus tire. Consider Michelin Pilot Sport A/S or Continental PureContact LS. I wanted to try the PureContact but they do not make a tire to support the load rating for the Mach-E in 20”. They do for the 19” size you’re interested in, though.
 

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tuminatr

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Whatever you replace, consider a tire airy Eco focus, which typically is rated for low rolling resistance. This helps range degradation.

While I love the Continental DWS 06 plus, they are not an eco focus tire. Consider Michelin Pilot Sport A/S or Continental PureContact LS. I wanted to try the PureContact but they do not make a tire to support the load rating for the Mach-E in 20”. They do for the 19” size you’re interested in, though.
Exactly right I went to a 245/50/19 non LRR (like the DWS) and the range decrease was noticeable. The biggest difference I saw was at highway speeds and trips around town it was less noticeable. For my car, it gave me a range of around 200 miles at 75mph highway speeds around town it was closer to 255 miles for an extended range AWD.

I have since switched to a set of 225/60/18 and CR1 wheels range is way up about 285 highway miles at 75mph

So it depends on what is important to you and where you drive.

One other very important note that is missed by most people tires have a profile. For example, the Primacy A/S is not designed to be a handling tire. You could keep the OEM size, keep LRR, and improve handling and road feel by going to something like the Pilot sport 4 or the Hankook Ventus in the OEM size.
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