Discussion: Tires for Increasing Range?

[kindofblue]

The difference is in Europe to be considered an all-season tire you need to have the TPMSF three-peak mountain snowflake rating.

Also, there is no such thing as a mileage warranty in Europe, so buyers make different choices than American buyers. The choices made in Europe are more based on traction and less on how long the tire will last. Summer tires give you much more grip but like you stated at the cost of longevity. So we all make trade-offs I would rather have traction.

I attached a map showing where Europe falls latitude-wise compared to the USA. Kinda hits home when they Siberia where Minneapolis and Saint Paul.

It's fairly normal for folks to run a winter and summer set. Some countries also require TPMSF-rated tires to be installed during certain months.

American all-season tires have traditionally been crap under 40F. I believe they are better these days but if they did qualify for the TPMSF rating they would have it.

Thanks for the overlay. I'd never noticed this difference in latitude before.

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[SnBGC]

Thanks for the overlay. I'd never noticed this difference in latitude before.

Agree. That was pretty cool to see.

 

[Triggerhappy007]

as an FYI tire pressure is set by the automobile manufacturer to maximize the tire's contact patch. On the pillar near your driver's door latch, you will find a placard that shows how much pressure ford recommends. The recommended pressure for a 19" wheel premium is 39psi. At 47 psi the tire is over-inflated and will wear out the center first

While that's supposed to be true a lot of times it's not when it comes to EVs/PHEVs. I've had a Focus EV, Prius Prime, Pacifica Hybrid, Leaf, and Mach-E. All required at least 2 psi over recommended to have a maximum contact patch. I have even wear on my tires even when overinflated. I will say that 47 psi is too high for me. I'm usually at 41 psi.

 

[x19]

If you do alot of highway driving I would suggest getting a set of CR1 18" wheels. The CR1 AWD is rated at 313 miles and there is no mechanical difference between it and the Premium AWD. I would also stick with a low rolling resistance tire. In one of Michelins press releases, they mentioned that the Primacy A/S is the most efficient tire they make.

I switched to CR1 wheels and my car picked up the range on the highway. The mile per KWH is averaging around 3.4 and I think that's really good. And yes that 3.4 on the highway @75mph road tripping.

Where did you get the CR1 wheels? Did you buy them off someone who was replacing them, or can you order them from Ford?

 

[dtbaker61]

Looking to get new tires as my OEMs are nearly bare by this point (43,000 miles). I drive a TON on highways, and all the discussions on tires consistently say range reduction hits more on highway with wider tires. So that's not a logical option for me.

Has anyone bought tires that have increased their range?

If not, I'm probably going to stick with the OEM Michelin Primacys 225x55x19 that came stock with my Premium.

if you do a lot of highway.... you might even go -1 on width. Make sure tire pressure is near the top of suggested pressure.... and consider 'aero covers' for your wheels if you want to squeak out a little more range. Oh, and keep your speed down if range is what you are after.

 

[tuminatr]

While that's supposed to be true a lot of times it's not when it comes to EVs/PHEVs. I've had a Focus EV, Prius Prime, Pacifica Hybrid, Leaf, and Mach-E. All required at least 2 psi over recommended to have a maximum contact patch. I have even wear on my tires even when overinflated. I will say that 47 psi is too high for me. I'm usually at 41 psi.

Automobile manufacturers account for a range of PSI mainly because of temperature changes. I would say a few PSI over or under is OK. However, 8psi over is actually overinflated and will most likely wear funny. It would make the car more efficient so that's a plus.

Where did you get the CR1 wheels? Did you buy them off someone who was replacing them, or can you order them from Ford?

I bought them used off eBay, but you can get them through ford. Check the member marketplace and eBay

 

[SWO]

Thanks for the overlay. I'd never noticed this difference in latitude before.

It doesn't tell the whole story though as Europe gets winds/currents from the Caribbean which temper their climate. Hence why London in the UK doesn't get the same amount of snow as London, Ontario.

 

[TruWrecks]

as an FYI tire pressure is set by the automobile manufacturer to maximize the tire's contact patch. On the pillar near your driver's door latch, you will find a placard that shows how much pressure ford recommends. The recommended pressure for a 19" wheel premium is 39psi. At 47 psi the tire is over-inflated and will wear out the center first

As an FYI that only applies to the tires that ship on the cars from the factory and are a recommendation based on those tires and OEM equivelant replacement tires. Some tires that have different construction may allow for higher or lower pressures.

 

[tuminatr]

As an FYI that only applies to the tires that ship on the cars from the factory and are a recommendation based on those tires and OEM equivelant replacement tires. Some tires that have different construction may allow for higher or lower pressures.

That's not compliantly accurate.

The way it works is tires have a load range the ones that fit the MME are:

225/60/18 104H XL
225/55/19 103H XL
245/45/20 103V XL

The load range is set by the Rubber Manufacturers Association and tires are made to fit the standard. For example, 225/55/19 99 is a standard load and 225/55/19 103 is an extra load. All MMEs use an XL or extra load tire.

The 104 or 103 is the load range and that tells the automobile manufacturer how much load the tire will support. Then they look at the load tables and adjust the pressure to maximize the contact patch. There are some other factors the automobile manufacturers look at like temperature range, passengers, cargo, towing ECT

An example of this in action is if you went from a 225/55/19 103H XL to a 245/50/19 105H XL you should technically lower the pressure from 39psi to 36psi.

How to use the chart, and how a car manufacturer sets the pressure

103 load index @ 39psi supports 1819lbs per tire
105 load index @ 36psi supports 1808lbs per tire

This is why it's either important to stick with the same as factory size so you keep the same load index or know what you're doing if your gonna make changes.

 

[Blue highway]

It doesn't tell the whole story though as Europe gets winds/currents from the Caribbean which temper their climate. Hence why London in the UK doesn't get the same amount of snow as London, Ontario.

YES compare temperatures and snowfall... the ocean currents change everything between NA and Europe.

 

[Blue highway]

Wheel size vs range...Engineering Explained on Youtube did a video on this and I've seen some tables on the web somewhere that corroborated this.

the so-what is that an 18 inch wheel will go ~7% further on a charge than a 19 inch wheel all other things being equal.

 

[tuminatr]

The aerodynamics of the wheels also have a huge effect. I read the engineers for Porsche white paper on designing wheels for a new car and never realized wheels make up 50% of the car's aerodynamics

 

[Krimpy]

I have been driving on the Michelin Pilot Sport AS UHP for about 1500 miles now on the factory Premium rims and sizes. I get much better grip and better braking and still get great efficiency.

2.9 to 3.2 m/kw at 70-75 MPH. I run the tire pressure at 45-46 psi for the ride quality. The tires are rated for 50 psi for the XL load range. At 47 psi the tread is flat on the ground and is wearing even. The Mach-E handles like a Mustang should.

What size tire do you have? I do not see 225/55R19 as an option on Michelin's website.

 

[TruWrecks]

What size tire do you have? I do not see 225/55R19 as an option on Michelin's website.

 

[Krimpy]

Thanks. I just was at my tire dealer getting a nail plugged knowing that I am going to need to replace my oem's before winter hits. They do not show on Michelin's site as an option but they totally are. The tire place gave me numbers and they are a little better than even tireracks pricing. Thanks again!

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