Space Ghost GT

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I’m not seeing those figures over winter with my cc2. Not even in kms.
Turn off 1pd and keep your foot out of it. Try to get your driving scores close to 100% and should be a problem
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Guss-E 2021

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That Han

That Hankook will be absolutely horrendous in the snow and wet. The sipes are far far too small and not enough voids for snow on snow traction. Also that compound which has a very high silica content otherwise known as glass will be rock hard in low temperatures further compounding the problem. They state 6% average gain is it worth it for all the compromises in ride comfort and traction?
Well I have no intention of buying them blindly out of hand. I'll wait for real world results. I'm interested in trying a different tire than stock Michelins. Lots of feedback and opinions in the forums about alternate tires. But none are perfect. I'll figure it out when the time comes.
 

tuminatr

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I’m not seeing those figures over winter with my cc2. Not even in kms.
Depends where you drive, rolling resistance has the largest effect on the range at highway speeds. If you drive mostly city streets you may not notice much difference at all. If we use the Euro standard the factory tire on their MME is an A rated and the CC2 is a C it's a 2% loss in efficiency for each letter grade. A tire like the DWS is rated D . So CC2 would have around a 6% loss and the DWS would have an 8% loss. Change the wheels and you could have an additional loss, and just like the tires mostly noticeable at highway speeds.

This is what has me excited about the next-gen EV tires like that Quatrac EV it's rated a B in efficiency and has similar handling and wet/dry and elevated winter performance over the best all-season tires.
 

AllenXS

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Turn off 1pd and keep your foot out of it. Try to get your driving scores close to 100% and should be a problem
My driving scores are close to 100% and with 1pd.
2pd is so 2020 :p
 

Space Ghost GT

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That’s why your range is god awful. 1pd is a gimmick brought to us by the gimmick king.

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dtbaker61

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How much range loss. You should only see 5-7% from non ev tires. I have 255/45-20 DWS 6+ put on at delivery and still get 3.6-4.0 kWh/mi. I am not going to take the horrendous wet weather and winter performance of an EV tire.
'range loss' means what to you?

If it is a drop in what you see on the GOM, that is likely due to ambient temperature dropping and use of eHeat rather than from a change in tire compound if you kept the same width. The change in rolling resistance with all else being the same is pretty tiny from what I've noticed in my daily driving which is a mix of urban/suburban/mountain mostly.

A fair test would be to look at your average miles/kw consumption over the same route and same speed, with same HVAC settings at same ambient temp.

I noticed about 5% drop in efficiency over 'average routes' under same conditions and temps (from 3.1 to 3.0 miles/kWhr) when I changed from OEM Michelins to Conti DWS, but I suspect a good deal of that was +1 width from 225 stock to 245.
 

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'range loss' means what to you?

If it is a drop in what you see on the GOM, that is likely due to ambient temperature dropping and use of eHeat rather than from a change in tire compound if you kept the same width. The change in rolling resistance with all else being the same is pretty tiny from what I've noticed.

A fair test would be to look at your average miles/kw consumption over the same route and same speed, with same HVAC settings at same ambient temp.

I noticed about 5% drop in efficiency over 'average routes' under same conditions and temps (from 3.1 to 3.0 miles/kWhr) when I changed from OEM Michelins to Conti DWS, but I suspect a good deal of that was +1 width from 225 stock to 245.
Tires are complex but this little of a difference in width would have almost no effect on range. Engineering Explained did a video on this and according to his math it was negligible
 

dtbaker61

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Tires are complex but this little of a difference in width would have almost no effect on range. Engineering Explained did a video on this and according to his math it was negligible
there is theory, and there is measurement.

in my case the combination of changing tread, compound, AND width resulted in 'about' 5% drop in miles/kWhr under 'about the same' test conditions and route. I am happy to pay that drop in exchange for better traction/handling compared to stock and no discernible increase in road noise.
 

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How much range loss. You should only see 5-7% from non ev tires. I have 255/45-20 DWS 6+ put on at delivery and still get 3.6-4.0 kWh/mi. I am not going to take the horrendous wet weather and winter performance of an EV tire.
I went from 3.3 highway to 2.8. Lost 30 miles in summer and little more in winter.
 

tuminatr

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there is theory, and there is measurement.

in my case the combination of changing tread, compound, AND width resulted in 'about' 5% drop in miles/kWhr under 'about the same' test conditions and route. I am happy to pay that drop in exchange for better traction/handling compared to stock and no discernible increase in road noise.
Food for thought the 19" Continental Tire Rack Test was a 6% difference and the tire they used is the Pure Contact LS that tire offers Continental's green technology and Continental says is more efficient that the DWS06+

Unlike other EV's Ford put sound-deadening material in the wheel wells so it would take running something like a dedicated winter to make a noticeable difference and even then it would be slight.

Lastly, I am not disputing your results, based on your driving style and route you are doing better than most with this tire and I am very glad you are happy.

Here is the EE video that talked about width seriously not being a big factor.

 
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Space Ghost GT

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I went from 3.3 highway to 2.8. Lost 30 miles in summer and little more in winter.
You should be in the 3.1’s. Loading 30 miles and down to 2.8’s shouldn’t be from the switch in tires alone.
 

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All I can say is I was using 15 to 16% battery to drive my 47 miles to work every day in the Summer and it dropped to 19% after tire change out. It's 22-23% in the Winter. I did go with the 245's but wasn't expecting quite that much impact. That's 6-8% round trip of extra battery usage. I have around 12K on these now but will probably put the Hankook ION's on in March
 

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For me with 245/45/19 and wide open star wheels I would get almost normal around town. But on the highway the range was right around 200 miles. When I say highway I mean 75mph saint Paul, MN to Chicago only stopping to charge, eat, or bathroom.
 

Space Ghost GT

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All I can say is I was using 15 to 16% battery to drive my 47 miles to work every day in the Summer and it dropped to 19% after tire change out. It's 22-23% in the Winter. I did go with the 245's but wasn't expecting quite that much impact. That's 6-8% round trip of extra battery usage. I have around 12K on these now but will probably put the Hankook ION's on in March
Wheel weight can also affect your efficiency. If you’re in a warm climate the hankook ions will work but they will it handle even light snow. You’ll give up some dry traction and ride quality the biggest deficiency will be wet handle and braking distance. Also most of your rolling resistance comes from the hysteresis of the tires sidewalls. Eco tires have to use a reinforced sidewall and a rock hard compound to make a meaningful difference in rolling resistance. If you didn’t go aftermarket on wheels then the 245 will be at the limit of its mounting width and you’ll be really flexing those sidewalls which will really add to rolling resistance.
 

Space Ghost GT

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I thought that weight would make a big difference and have a 19.5lb 19" wheel. When those were installed the car accelerated noticably faster but regenerative braking didn't work as well because the rotating mass is less.

The marketing on the handbook looks good but I would like to see some 3rd party tests to see if they are actually any good.
Yah hopefully tire rack puts them through their paces including winter testing. There’s also YouTube channel think it’s called tyre reviews does a good job as well (though he test some euro spec only tires on his channel but ironically does all his testing in the states).
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