Most efficient LRR tire to replace Ecopia 422

[miamor]

HEY THIS IS A TECHNICAL TOPIC
maybe best to look over there, that's where I looked and commented on my Yokohama choice

Let's see if I can link to it here: viewtopic.php?t=1285

[mpulsiv]

HEY THIS IS A TECHNICAL TOPIC
maybe best to look over there, that's where I looked and commented on my Yokohama choice

Let's see if I can link to it here: viewtopic.php?t=1285

The link you provided is for general discussion of tires. This thread is specifically for the availability and selection of low resistance tires. Your Yokahama Avid Ascend is not a low resistance tire. VW dealer took advantage of you by selling you a generic tire.

[miamor]

Your Yokahama Avid Ascend is not a low resistance tire.

Ah, I beg to differ. Are you stating fact or opinion?
I can use the facts:

• the coasting test is the same as it was on ecopia, from 60 to 30 MPH it goes .7mi

• the universal coding on sidewall lists treadwear 800, cheap crap is around 400

• a 100 mile trip at 66 MPH had over 20 mi remaining on GOM, and getting about 4mi/kWh

[mpulsiv]

Your Yokahama Avid Ascend is not a low resistance tire.

Ah, I beg to differ. Are you stating fact or opinion?
I can use the facts:
the coasting test is the same as it was on ecopia, from 60 to 30 MPH it goes .7mi[/list]
the universal coding on sidewall lists treadwear 800, cheap crap is around 400[/list]
a 100 mile trip at 66 MPH had over 20 mi remaining on GOM, and getting about 4mi/kWh[/list]

I'm stating facts. Validated with different set of wheels and tires.
Your coasting test doesn't have enough data to draw a conclusion.

Try spending more effort on your methodology.

• Find a road, at least 10 miles long with some rolling hills.

• Ensure outdoor temperature doesn't fluctuate more than ~10 degrees.

• Repeat this exercise 3-4 times and record average kWh consumption.

Based on my data, crappy Ecopia is the gold-standard in rolling resistance.
Standard all-season tire (e.g., Michelin, Bridgestone, Goodyear, Yokohama): 3.4 kWh
Low resistance Ecopia EP422 plus: 4.2 kWh

[miamor]

Standard all-season tire (e.g., Michelin, Bridgestone, Goodyear, Yokohama): 3.4 kWh
Low resistance Ecopia EP422 plus: 4.2 kWh

It's great we are trying to use real world testing. However I wish you would have indicated if climate control was constant every time and what speed? And for the rest of our dear viewers, I think Mpulsiv means mi/kWh with his numbers. But good job in experimenting!

[mpulsiv]

Standard all-season tire (e.g., Michelin, Bridgestone, Goodyear, Yokohama): 3.4 kWh
Low resistance Ecopia EP422 plus: 4.2 kWh

It's great we are trying to use real world testing. However I wish you would have indicated if climate control was constant every time and what speed? And for the rest of our dear viewers, I think Mpulsiv means mi/kWh with his numbers. But good job in experimenting!

Wait, your attempt was to deliver data without real world testing?
Consistency is the key. Find a protocol and stick with it. I thought that I provided enough detail in simple test methodology. Let's add more details to the mix.

• Attempt to do the runs on the same day. It's irrelevant if you are doing this during cold winters or hot summers. As long as the temperature is consistent. Climate control is irrelevant as well. Just ensure that it's consistent.

• Find a road, at least 10 miles long with some rolling hills.

• Accelerate and stop as normally would. Do your best to maintain the same speed. Ideally, when roads are clear of traffic. Sunday mornings is the best, while majority of drivers are still sleeping I did my runs throughout the range (e.g., 0 - 50 mph).

• Ensure outdoor temperature doesn't fluctuate more than ~10 degrees.

• Repeat this exercise 3-4 times and record average miles/kWh consumption.
  My assumption is that you know how to reset this in settings, for every drive test your attempt. If not, read the owner's manual.

Low-resistance Ecopia can coast a long distance, hence no energy is wasted on the accelerator pedal. Standard all-season tires will slow down in a short distance.
You can perform roll down tests on any hill to see how efficient Ecopia really is.

[mpulsiv]

Pirelli launched P ZERO ALL SEASON PLUS elect (OEM tire on Lucid) www.pirelli.com/tires/en-us/car/catalog ... plus-elect
Sadly, 235/45/18 won't fit our e-Golf.

At this point it's safe to say that tire manufacturers won't focus their resources on small 205/55/16 low resistance tires. We are stuck with Bridgestone Ecopia 422 until e-Golf end-of-life.