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Re: Nice Efficiency Improvement

Posted: Sun Mar 21, 2021 11:45 am
by LeftieBiker
Leftie, yep, my testing so far seems to show a small benefit around town, and hard to measure at highway speeds. Roll down does seem better, but I don't have the patience to do it scientifically. I do plan a "very" high speed test when it gets warmer (75mph) which I am hoping might yield .1 or so, but enjoying the wheels none the less. The good news is that I now have 16" rims free for the SV+ in a year or two when I need tires.
That was GerryAZ, not me.

Re: Nice Efficiency Improvement

Posted: Sun Mar 21, 2021 12:17 pm
by HerdingElectrons
DougWantsALeaf wrote:
Sun Mar 21, 2021 11:36 am
As we have both a Leaf with 17" wheels and 16" narrower wheels, I confirm, the smaller wheels increase your efficiency 6-10%. It's very noticeable at 70mph. What rims did you use?
http://www.veloxwheels.com/wheels/mantra

I went with these wheels because they were offered through Costco & they had a promo + a bonus promo for buying a set of tires with the wheels. I ended up paying $480+tax for the set of wheels & $1033 OTD.

I typically drive 60mph on the freeway & only about 30% of my miles is freeway. I have an older Prius that I tend to use more longer hwy scenarios. I have intentionally created my life around a 5-25 mile radius so my driving is often(20-25K miles/yr) but highly local

Re: Nice Efficiency Improvement

Posted: Sun Mar 21, 2021 2:16 pm
by denwood
HerdingElectrons wrote:
Sun Mar 21, 2021 11:12 am
...
The 17" OEM combo if TireRack's weight for the OEM Michelin specs are to be believed means that I went from a 47.2lb per corner to a 38.92lb per corner so a reduction of 8.28lb which is very noticeable during initial acceleration. basically I now get the "eagerness" of the car when Eco mode is turned off with the lighter combo while still in Eco mode.
...
That's what I would have predicted. That 8lbs of rotating mass is very significant on acceleration. On the other end, you'll have less regenerative braking energy to recover. Given the inherent inefficiency of regen, better to save those electrons on acceleration. It's the same when you swap over to say larger disc rotors and brakes for a "performance" upgrade. Yes, you stop better, but almost always at the cost of acceleration.

Try those in gear acceleration times! Thanks again for posting. Very interesting stuff for a techno geek like myself.

Re: Nice Efficiency Improvement

Posted: Wed Mar 24, 2021 8:51 am
by DougWantsALeaf
Ok, I fixed fixed Google image permissions for the car pic with the ev01 wheels.

https://drive.google.com/file/d/10XaT8J ... p=drivesdk

Re: Nice Efficiency Improvement

Posted: Thu Mar 25, 2021 10:56 am
by HerdingElectrons
Looks good!

I need to make time to take a pic of my wheels after I wash the car!

Re: Nice Efficiency Improvement

Posted: Thu Mar 25, 2021 4:46 pm
by denwood
They look just fine :-) Post a pic without the covers...just curious.

Re: Nice Efficiency Improvement

Posted: Thu Mar 25, 2021 5:58 pm
by DougWantsALeaf

Re: Nice Efficiency Improvement

Posted: Fri Mar 26, 2021 6:41 am
by denwood
Thanks for posting that :-)

I figure they look a bit better without the covers? Getting the inserts color matched to the car might take that look up a notch again.

Re: Nice Efficiency Improvement

Posted: Fri Mar 26, 2021 8:33 am
by DougWantsALeaf
I did like them without the covers on. I debated whether I should have waited longer before fitting the covers.

It is about an hours work to add or remove the covers; a bit more effort than to take the Tesla Aero covers on and off.