EV Tires vs. non-EV Regular Tires - test comparison by Tire Rack!

[mkhuffman]

Handling, traction and noise were improved but I lost >10% range and fuel economy.

That is consistent with what others have reported.

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[garyd9]

If you want to know the true mi/kWh, you need a OBD scanner and calculate it based on the EtE before and after the trip. It will be significantly different from what you see in the trip computer.

EtE ? HVB energy to empty?

 

[mkhuffman]

EtE ? HVB energy to empty?

Yes. Sorry. Energy to Empty.

Note what it is when you start and when you finish the trip. Then divide it into the miles traveled. It won't match the trip computer. It should. Why can't the car just do the same math? It obviously isn't.

 

[garyd9]

Yes. Sorry. Energy to Empty.

Note what it is when you start and when you finish the trip. Then divide it into the miles traveled. It won't match the trip computer. It should. Why can't the car just do the same math? It obviously isn't.

Maybe it’s guesstimating potential charging losses? I’ll have to try this with car scanner next time I take a drive of more than a dozen miles.

 

[sid234]

PSA - the trip efficiency data is not accurate.

If you want to know the true mi/kWh, you need a OBD scanner and calculate it based on the EtE before and after the trip. It will be significantly different from what you see in the trip computer.

Today I drove 148 miles and the trip computer said 2.4 mi/kWh, but based on the energy actually removed from the battery it was 2.77. That is beyond significant. It's ridiculous.

It's sad that Ford cannot incorporate this kind of data and make it easily accessible in the car/app

 

[mkhuffman]

It's sad that Ford cannot incorporate this kind of data and make it easily accessible in the car/app

I agree. There is a ton of data available via a ODBII scanner that would be awesome to include in Sync.

 

[waldo22]

Actually it's just a load rating requirement. I had 245/55/18 103 SL btw that's the proper +0 fitment for the MME on my premium.

If you don't fit an XL it still needs to support the weight. Consult the load and inflation tables to be sure. And unless you are an expert the " this car requires an XL" is probably the best philosophy

I have never seen a p-metric tire with more than two plys in the sidewall. But and to your point I would stick with an XL they typically do offer more robust construction. I won't comment on what is more robust because it is different for each MFR and model.

@tuminatr I'm no expert for sure, but I remember someone else on the forum advising me not to put SL tires on the MME, so I looked it up...

https://www.macheforum.com/site/thr...-to-choose-for-stock-wheels.27324/post-626112

...and it was you

LOL. I do agree with you that I think it's best to stick with XL tires, even if the ride is a bit more harsh and noisier.

 

[tuminatr]

@tuminatr I'm no expert for sure, but I remember someone else on the forum advising me not to put SL tires on the MME, so I looked it up...

https://www.macheforum.com/site/thr...-to-choose-for-stock-wheels.27324/post-626112

...and it was you

LOL. I do agree with you that I think it's best to stick with XL tires, even if the ride is a bit more harsh and noisier.

Please don't misunderstand what XL is, it's simply the ability to handle more air pressure. It was originally designated to replace LT LRE because that rating is not robust enough. People were asking for Load Range E / 10 PLY and just like XL that's not enough info. You need to know the Load range and inflation pressure. See attached chart. Within the same size, it can designate a higher carrying capacity by showing a higher load rating. It can also correspond with a stiffer sidewall but that's not a given. It has nothing to do with harshness or noise.

Most of this is moot to talk about because typically tire manufacturers know the application based on the size and either manufacture a SL or XL based on the size requirements. For example, you can't buy a 245/45/20 in an SL you can buy a 225/60/18 or 225/55/19 in an SL but both of those are 99SL and will not work on a Mach E.

So the example I gave was 245/55/18 103SL Vs 225/60/18 103XL both these tires support the same weight because of the 103 rating but for the SL you only need to use 34 PSI the XL you need 39PSI.

So to make a short story long the 103 load rating is what's important. The XL does it with higher pressure which is better for efficiency but offers a rougher ride (because of the higher pressure)

P-Metric tire sizes come with Light Load (LL), Standard Load (SL) and Extra Load (XL) designations. P-Metric sizes with Light Load (LL) and Standard Load (SL) designations have the maximum load capacity at 35 or 36 psi, while P-Metric sizes with Extra Load (XL) designation have the maximum load capacity at 41 or 42 psi. Inflating P-Metric tire over its maximum inflation pressure will not increase its load carrying capacity. There is also a new EV standard adopted by the Rubber Manufacturers Association this year called HL but it's rare to see.

 

[MachEnthusiast]

I'm really intrigued by the Hankook Ion SUV AS tires. Summer road trip range is really important to me, especially on the GT since it's got really short legs already (230ish miles @ 70mph with the OEM Continentals). It's clear from the testing that the Hankooks can stretch out the miles. My only hesitation with them is that they aren't that great on wet roads which is an issue for me in Seattle.

It's too bad the Goodyear Ecoready tires aren't sized for the GT yet since they have a really good mix of efficiency and wet road grip.

I'm in Seattle, too. What did you end up with. I was so sure I was going to pull the trigger on the Hankooks last night until I read this very thread that talked me out of them because of their poor wet performance.

 

[mkhuffman]

I'm in Seattle, too. What did you end up with. I was so sure I was going to pull the trigger on the Hankooks last night until I read this very thread that talked me out of them because of their poor wet performance.

There is definitely a tradeoff between wet performance and efficiency. Lower rolling resistance = less wet traction. it is a proven relationship. And the Hankooks may be the most efficient tire for sale right now. Maybe.

Regardless, I am very satisfied with the wet performance of my tires. I drive at high speed in heavy rain, and they do just as well as any AS tire I have ever had. They are not as sticky on twisty roads, but they are very predictable, and you can easily tell the limit when cornering aggressively. There is nothing dangerous about these tires on wet roads. Nothing at all.

And I am very, very satisfied with how much more efficient they are.

 

[MachEnthusiast]

There is definitely a tradeoff between wet performance and efficiency. Lower rolling resistance = less wet traction. it is a proven relationship. And the Hankooks may be the most efficient tire for sale right now. Maybe.

Regardless, I am very satisfied with the wet performance of my tires. I drive at high speed in heavy rain, and they do just as well as any AS tire I have ever had. They are not as sticky on twisty roads, but they are very predictable, and you can easily tell the limit when cornering aggressively. There is nothing dangerous about these tires on wet roads. Nothing at all.

And I am very, very satisfied with how much more efficient they are.

Thank you for this detailed response. From context I take it you have the Hankooks?

 

[AhardFSU]

Thank you for this detailed response. From context I take it you have the Hankooks?

He does. He said so in the other thread in which he responded to one of your posts.

 

[mkhuffman]

Thank you for this detailed response. From context I take it you have the Hankooks?

By the way, they excel at low noise and comfort. Since I got slightly larger tires with a higher load rating, I could reduce the air pressure some and improve comfort even more. I don't do that because lower tire pressure reduces efficiency.

 

[MachEnthusiast]

He does. He said so in the other thread in which he responded to one of your posts.

so he did

 

[silverelan]

I'm in Seattle, too. What did you end up with. I was so sure I was going to pull the trigger on the Hankooks last night until I read this very thread that talked me out of them because of their poor wet performance.

I’m not quite yet in the market for new tires. I’ve got two wheelsets and have only driven 24k miles in 3.5 years.

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