Discussion: Tires for Increasing Range?

[markboris]

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.

Brian, do you have or know of a chart that has higher load ratings than 108?

 

[tuminatr]

Brian, do you have or know of a chart that has higher load ratings than 108?

Yes, I'm on the road today but I can probably post it tomorrow

 

[markboris]

Yes, I'm on the road today but I can probably post it tomorrow

Thank you and no hurry at all.

 

[mkhuffman]

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.

I think Engineering Explained is a little off base. The reason why a smaller wheel provides better range is aerodynamics. If you have a highly aerodynamic 19 inch wheel it will perform just as well as a smaller one.

Size doesn't matter.

 

[DYohn]

I am less interested in "tires that help increase range" than I am in "tires that reduce cabin road noise." Any suggestions here?

 

[mkhuffman]

I am less interested in "tires that help increase range" than I am in "tires that reduce cabin road noise." Any suggestions here?

You could try a set of these:

 

[MachGT]

Let us know what you end up getting, and please provide the before/after average range and efficiency! A slightly larger diameter can sometimes improve range (going from 55 to 60). If that size is available. The tire rotates 5% slower for the same speed.

And +1 for Cali Route 1 wheels dramatically improving efficiency on the cheap.

 

[jeffdawgfan]

If you are looking for a really energy efficient tire...wait a few years...

https://www.bridgestonetire.com/learn/tire-technology/airless-concept-tires/

 

[mkhuffman]

If you are looking for a really energy efficient tire...wait a few years...

https://www.bridgestonetire.com/learn/tire-technology/airless-concept-tires/

First of all - so ugly. Seriously. I wouldn't put those on my car.

Secondly - in the entire article not a single mention of performance. Comfort, hydroplane resistance, cornering. All qualities that are very important but not for airless tires apparently.

 

[Nemy]

First of all - so ugly. Seriously. I wouldn't put those on my car.

I had read a while back that they could/would be faced to look like a regular tire and prevent environmental contamination. So that would work. Though, I agree, if it doesn't perform it doesn't matter what it looks like or if it can't be punctured.

 

[Guss-E 2021]

I’m in the camp of grip when it comes to tires. Low rolling resistance tires currently available have consistently worse showings where braking is concerned. And I’m not talking about 3-5 ft differences, I’m talking 15-25 ft from 65-70mph to 0. That’s a car length plus. Not worth the extra 10 miles imo.

I have to agree. Tires=safety. I'll find other ways to hyper-mile (like just driving slower). Plenty of threads in these forums about people improving ride and handling with tires not necessarily the most efficient.

IF the IRA really comes through, range will be less of an issue anyway (i.e. more public chargers). I'll ride my OEM tires until they no longer pass inspection and then onto some wider Continentals.

Oh and @PrimeFuture I've had my Premium AWD ER for about 3 months. Originally 100% charge would also show my over 300 miles of range. Then my girl got out in the real world and wised up . This morning I'm starting the day at 100% with 284 miles of range (car in garage, 46°F outside). Heading to a local EV event to show my car to interested parties.

 

[rhougey]

RWD Premium here. At 31K miles and 6/32”, I'm not needing tires yet, but this is the one I've seen, that I would go for if I was ready at this time.

 

[tuminatr]

I’m in the camp of grip when it comes to tires. Low rolling resistance tires currently available have consistently worse showings where braking is concerned. And I’m not talking about 3-5 ft differences, I’m talking 15-25 ft from 65-70mph to 0. That’s a car length plus. Not worth the extra 10 miles imo.

This is not necessarily true.

I will agree the factory tires give up traction and handling for smooth, quiet, and low rolling resistance.

But that's not nessisarilly a function of rolling resistance. All low rolling resistance is is a reduction of energy to form the contract patch and reform a round tire.

As a for instance the Michelin Pilot Sport 4s is a low rolling resistance Tire and arguably the best summer only tire on the market.

 

[Pushrods&Capacitors]

This is not necessarily true.

I will agree the factory tires give up traction and handling for smooth, quiet, and low rolling resistance.

But that's not nessisarilly a function of rolling resistance. All low rolling resistance is is a reduction of energy to form the contract patch and reform a round tire.

As a for instance the Michelin Pilot Sport 4s is a low rolling resistance Tire and arguably the best summer only tire on the market.

Michelin does not indicate that the PS4 or PS4S are true low rolling resistance tires. They may use Michelin’s Green-X technology but that’s not the same thing.

They do indicate that the Pilot Sport EV has a low rolling resistance section of tread blocks.

https://m.tirerack.com/tires/description.jsp?tireMake=Michelin&tireModel=Pilot+Sport+EV

But my point was really directed towards tires that are marketed specifically as being low rolling resistance/increased efficiency. No summer tires are marketed as such that I’m aware of.

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