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Aftermarket wheels and range on 500e - Page 7
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Thread: Aftermarket wheels and range on 500e

  1. #61
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    Correct, it's your imagination.

    Nitrogen is just to eliminate the very slight chance of corrosion, since it's chemically inert.

    Even going from recommended to max pressure made no difference in my range tests. Nearly nothing alters range as much as cold weather, 1-way hills, a few mph of wind, lowering the car a couple inches, or a few millimeters difference in the height of your right foot.

    Range does seem better with the humidity sensor unplugged, to stop it from running the A/C compressor without even lighting its button. Unplugging also allows recirculate, which saves cabin heat energy (& also A/C, when you need it colder inside than outside).

    Also the % gauge goes out of calibration after a while, reading lower than it really is, making range also seem lower than it really is. You can recalibrate it: Drive to 0% near a charger, park there with everything turned on until the 12V warning shows & then charge.

    I VERY strongly advise against the OEM Firehawks. I believe they're one of the worst tires available, with poor grip AND poor wear. Normally you get one OR the other.

    For under $300 out the door at America's Tire, including brand new TPMS sensors, I got a full set of Hankook Ventus V2 Concept 2 205/50-15s that are WAY better than the stock Firehawks in EVERY way except range & sound, which are identical. My friend got the exact same tires there for her 500e for even less on sale, & she also noticed no range difference.

    They're on track to last about 3 times as long, have much better wet grip, & 26% better dry grip (63mph on the same corner where Firehawks slid at 50).
    Last edited by ElectricTireShredder; 11-18-2020 at 01:52 PM.

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  3. #62
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    This is all really helpful information, I appreciate the feedback very much. I am a designer and artist, so this car stuff is totally out of my comfort zone, nonetheless I want to educate myself and be wise with my money.

    The perceived range loss might also be that I moved from LA (where the average MPH is 1-30 due to traffic) whereas in San Diego I can almost always exceed 75mph.

    Yes I too have driven a whole mile on 0 range!! It was not my plan. Ha Ha! I will always remember that experience;-)

  4. #63
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    Chilicoke- We are car twins! I have the same car, color, make and model- I love it! Really interesting about the tires!!!
    Last edited by Jen A; 11-18-2020 at 04:45 PM.

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    I found these guys...heavier than stock but very cool rally look and it fits our car.

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  7. #65
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    I recall GM recommending nitrogen when they first introduced TPMS, still recommended it as of 2005. Part of the reason was that the machine that separated nitrogen also separated out more water. Besides, they can't charge you $64 for air. (It was $16 or $18 to fill with nitrogen at my tire shop, and I think that was per tire.) Around 2010 our tire shop had brochures on why to use nitrogen. Supposedly, being a larger molecule, oxygen would escape while nitrogen would not, so your tires would maintain a proper inflation. If that is true, inflating your tires with air, something like 70% of the oxygen would deplete in a year... so you have a nitrogen fill. <g>

    He might have seen an increase in range after filling with nitrogen. A properly inflated tire will have less rolling resistance.

  8. #66
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    If you buy tires, at Costco, I think Sam’s too. They fill your tires with nitrogen. If they get low, on pressure. Free fill up. You can away tell which tires have nitrogen in them, by the green valve cover cap.

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  10. #67
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    As a chemical engineer I will tell you this - forget this BS about nitrogen in tires influencing anything.
    The only reason to add nitrogen to tires is to... prevent fires. It was introduced I think for the first time in aviation.
    From chemical point of view to actually make any difference, you should fill tires with Helium to make the wheels a bit lighter. Although Helium is about 10 times lighter than air, the mass saved is roughly 15 g, assuming about 10-15 liters of air inside the tire at 35 psi.

    Anyway, your problem with range.
    What tires do you have now? Is it same style/model as your previous car?
    When you say range - do you mean MPGe or miles/kWh or simply miles driven using, say 80% of the battery?
    What is the tire pressure?
    Are they same size?
    Was the alignment ever checked?

    Finally, the battety itself can be more "worn" than your previous 500e.

    While all those do not really matter for ICE car, in BEV it takes a huge impact.
    I would say - check all the above.
    If the tires you have now are 185/60 (OEM is 185/55) - then you need to correct your speed and miles driven. Turns out that 185/55 is much more expensive than 185/60. But being smaller you drive more miles per turn, while the battery cares about the overall distance.


    Now, what tires?
    It all depends on what you do, how you drive, and where you live.
    I went with semi cheap, but with relatively "large blocks" tires, meaning more summer like.
    I cared about wet grip.

    So, many factors can affect your milage.



    Final word about air.

    If you have a compressor at home (tank compressor) use it to pump your tires.
    Let it fill completely, wait overnight to condense all water, drain it from the bottom of the tank, and then pump the tires.
    Nitrogen myth is mainly true due to the fact they pump much drier gas. Air, on certain days contains a lot of moisture. Some days, foggy days, will have up to 100% relative moisture contents. So if you pump it into the tire - its pressure will change drastically with temperature. Moisture expands 100x more than air (it goes over 1500 times if you create steam).
    Current rides: 2019 Chevy Bolt LT, 2016 Audi Q5 Premium
    Previous rides: 2014 FIAT 500e, 2016 KIA Forte5 SX 1.6 T-GDI, A/T, 2016 FIAT 500X Trekking Plus AWD, 2015 KIA Forte5 SX 1.6 T-GDI, M/T, and many more...

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  12. #68
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    Quote Originally Posted by Jen A View Post
    The perceived range loss might also be that I moved from LA (where the average MPH is 1-30 due to traffic) whereas in San Diego I can almost always exceed 75mph.
    There's the reason, since speed is by far the biggest range factor besides freezing weather & 1-way uphills (up AND down or round-trip you gain most of it back)

  13. #69
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    Yes and also the fact that my current Fiat is 2 years older than my previous leased one was. I think the older ones have less range. Even when I had the older one for a time in LA, it seemed to be slightly less range than the newer one. However, it's hard to say because once I was out of traffic, I tend to put the petal to the metal. There is a MASSIVE range difference from driving on the side streets to freeway driving at 70-80 mph. It seems like the range is only 60-70 miles if going full speed on the freeway with the AC running.
    Quote Originally Posted by ElectricTireShredder View Post
    There's the reason, since speed is by far the biggest range factor besides freezing weather & 1-way uphills (up AND down or round-trip you gain most of it back)

  14. #70
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    That's good to know about freezing weather too. I had no idea. Good, I hate the cold anyway.
    Quote Originally Posted by Jen A View Post
    Yes and also the fact that my current Fiat is 2 years older than my previous leased one was. I think the older ones have less range. Even when I had the older one for a time in LA, it seemed to be slightly less range than the newer one. However, it's hard to say because once I was out of traffic, I tend to put the petal to the metal. There is a MASSIVE range difference from driving on the side streets to freeway driving at 70-80 mph. It seems like the range is only 60-70 miles if going full speed on the freeway with the AC running.

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