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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Sun Apr 02, 2017 12:17 am 
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Joined: Mon Feb 20, 2017 7:53 am
Posts: 37
jimbo69ny wrote:
I'm looking into this again. I just weighed my stock wheels and tires, they are 45.6lbs.

The 16" Enkei RPF1's 17x7" are 14.6lbs
Ecopia EP422 are 25lbs
Champion Fuel Fighter tires are 25lbs

That would be 39.6lbs total, per wheel. A savings of only 6lbs per wheel.

I'm not sure that it would be worth the investment. I'm still curious as to if anyone has gone with the RPF1's or any other lightweight wheel. I'm wondering what they experienced when it comes to range.


I would expect to see an easily measurable improvement in efficiency with a 6lb per wheel weight reduction.

In my Prius days, I noticed a drop from 43 to 37 MPG (about 13% decrease) when I increased my wheel weight by 6.5lb.


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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Sun Apr 02, 2017 1:25 am 
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Joined: Mon May 19, 2014 4:49 am
Posts: 443
Location: Ithaca, NY
i could also lose 24lbs myself... that would probably help too.

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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Sun Apr 02, 2017 5:14 pm 
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Joined: Mon May 13, 2013 6:15 am
Posts: 311
Location: Fremont, CA
jimbo69ny wrote:
i could also lose 24lbs myself... that would probably help too.


I've lost 53 lbs. since i bought my Rav4EV but it hasnt helped range a noticable amount :oops:

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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Mon Apr 03, 2017 12:14 am 
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Joined: Wed Jun 04, 2014 6:10 pm
Posts: 109
Location: San Luis Obispo, CA
I am curious if the TRD wheels that were used on the RAV4 EV for the Pikes Peak run were any lighter than stock ones. It appears as though they were running lower profile tires which might lower the weight but at the expense of changing the effective gearing (resulting in faster acceleration times and reduced range). If I had extra money I would modify my RAV4 EV to improve it's handling with the coil over shocks, the slight lowering, and the larger brakes. The wheels and tires they used would improve handling but at the expense of reduced range.

http://www.trdusa.com/rav4.html


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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Thu Apr 20, 2017 4:21 am 
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For the record, the OEM Rav4 EV wheels are 23.2lbs each.

Image


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 Post subject: Re: aftermarket wheelson the RAV4 EV
PostPosted: Thu Apr 20, 2017 6:17 am 
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Joined: Mon Feb 20, 2017 7:53 am
Posts: 37
Here's a pretty good article.

https://www.tirerack.com/wheels/tech/techpage.jsp?techid=108

It has empirical data and everything.

Taking it a little further ...

changes in rotating wheel mass:
38.5 lb to 48.5 lb
+10.0 lb => +25.97%

impact on fuel economy:
22.8 mpg to 21.1 mpg
-1.7 mpg => -7.46%

Browsing some tire & wheel dealer sites it looks like I might be able to shed around 4 or 5 lbs per wheel. Given the 25:7 ratio above, a 9% reduction in weight could result in around a 2.5% increase in range.

I think I'll keep my money for now.


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