jimmol
Posts: 16
Joined: Wed Aug 16, 2017 9:40 am
Delivery Date: 16 Aug 2017
Leaf Number: 318723

Leaf wheel questions

Thu Apr 01, 2021 7:11 pm

It is time to replace my summer tires and after reading various and sundry posts about wheel and tire size, I am leaning toward putting 16 inch wheels in the hope that I might gain a bit more milage out of my battery in my 2015 leaf. It still has 12 bars at 49000 miles and 20.5 kW available/90.28 SOH.
I have some questions about wheel rims that I would like your input..

Width: the 16” Leaf wheel has 6.5” wide rims, I believe, is it alright to go wider as long as the tire will fit it?

Do rims have load ratings? If so what load rating do I need for my 2015 Leaf SL? (The Enkei RPF1 is the only one to list a Load rating of 690 https://www.vividracing.com/enkei-rpf1- ... l?cat=6424)

Offset: 40 mm. Can the offset be higher? If so, by how much?

The rims I am looking at come with centering rings. Can anyone explain what they do? I though the lug nuts would center the wheel.

All of the rims offered covers for the center. Is this necessary?

On the tire rack site, all the rims recommend 205/55-16. Would there be any problem going to a 205/60-16?

I am considering two rims that weigh in at 18 lbs: Focal F20 and the Motegi Racing MR143 cs6. The Enkei Racing RPF1 caught my eye at 14 pounds, but at a price.

On to the tires:
To keep the speedometer and odometer close to the values using 17” tires, I am thinking of using 205/60-16 ECOPIA EP422 PLUS tires (51 psi max) which will make the tire 1/4” taller and will make the actual car travel at at 65.5mph when reading 65 on the speedometer. Plus this tire weighs in at 19 lbs., 3 pounds less than the 17”. Add to that the savings of a smaller rim - someone said the 17” were around 25 lbs. - comes out to around 10 lbs., maybe even 14 lbs. less per wheel.

As to how many more mile can range depends on who you listen to: One video implies it will add up to 10+% while others have said there is a noticeable difference to those who doubt it will save much at all.

But for me, I need new tires, want to get wheels so all I have to do each year is swap out, and maybe get them balanced before hand, so now might be a good time to try to smaller rims, unless one of you can talk me out of it.

Thanks for your help and input for selecting the correct wheel rim.
Last edited by jimmol on Sat Apr 03, 2021 5:23 pm, edited 1 time in total.

DougWantsALeaf
Posts: 2782
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Leaf wheel questions

Thu Apr 01, 2021 8:01 pm

I have been pretty happy with my 16" ev01+ rims. They are 15.9 Lbs a piece without the inserts (add a couple 9unces per insert).

I have the stock Ecopias on the rims, but I like the idea of going to a 60 height tire.
2019 S Plus (93.86% SOH) & 2019 SV Plus (93.35% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

goldbrick
Posts: 1304
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: Leaf wheel questions

Thu Apr 01, 2021 8:29 pm

Offsets can vary but the farther away from stock you get the more the handling will be affected. If you have wider or narrower wheels a different offset can accommodate this difference a bit but I'd try to stay close to stock. The centering rings are used to center the wheel on the hub. Some wheels are hub-centric meaning the hub hole centers the wheel and some wheels are bolt-centric meaning the wheels are centered by the bolts. I'd guess that the shape of the lug nuts/bolts and mounting holes are different on bolt-centric wheels than hub-centric but I'm not an expert.

Don't forget you'll need new TPMS sensors. I bought some on Amazon that specified they were made for my model year Leaf and then had someone with an Autel tool match them to my car. I had some others I got from ebay that said they worked with Nissan that didn't work so be sure to get something that is made for your model Leaf and then expect to have to pair them with the car.

jimmol
Posts: 16
Joined: Wed Aug 16, 2017 9:40 am
Delivery Date: 16 Aug 2017
Leaf Number: 318723

Re: Leaf wheel questions

Fri Apr 02, 2021 5:44 am

DougWantsALeaf wrote:
Thu Apr 01, 2021 8:01 pm
I have been pretty happy with my 16" ev01+ rims. They are 15.9 Lbs a piece without the inserts (add a couple 9unces per insert).
Thanks for weighing in.
I had read about this from your "EV01+ with aero covers" post. I did email and "attention: Chris" last Tuesday and am awaiting a reply.
So if you use the inserts, it adds 2.8 pounds. Good to know.
The 60 raised the car back to original height so you lose any benefit of lower profile.
If you don't mind, could you pm me the price you paid for the 16"?

Thanks again

jimmol
Posts: 16
Joined: Wed Aug 16, 2017 9:40 am
Delivery Date: 16 Aug 2017
Leaf Number: 318723

Re: Leaf wheel questions + please check my math

Fri Apr 02, 2021 6:27 am

goldbrick wrote:
Thu Apr 01, 2021 8:29 pm
Offsets can vary but the farther away from stock you get the more the handling will be affected. If you have wider or narrower wheels a different offset can accommodate this difference a bit but I'd try to stay close to stock.
It appears, in this case, that the offset would barely change the tire location as compared to the 17" tire, if my math is right.

The 16" tire is .39 (9.91mm) narrower. Every rim is 1/2" wider. Only one rim, the RPF1, has a 43mm offset vs the others with a normal 40mm. So:

The 43mm offset would move the wheel center 3mm away from the hub mounting surface toward the car, which means the car side edge of the wheel would be closer to the car and back from from the curb.

The narrower tire would move the tire on the car side 4.9mm away from the car and 4.9mm away from the curb, if I am thinking right.

The 17" wheels have a 46mm offset.
The 16" rim would move the wheel center 3mm toward the curb. The 16" smaller tire width would move the side of the tire back 4.9mm from the curb, ending up with the curb/outside edge of the tire being 1.9mm further from the curb than the 17" tire.
Meanwhile, on the car side...
The 16" rim would move the wheel 3mm away the car. The 16" smaller tire width would move the side of the tire back 4.9mm from the car, ending up with the car/inside edge of the tire being 7.9mm (0.31") further from the car than the 17" tire.

The stick diagram below is a simple illustration.
[_|_____|] [____] original 17"tire |___| 16" tire

Centering rings make better sense and I am hoping that Tirerack will be carrying the proper Nissan TPMS sensors.

Appreciate your time.

I apologize for the multiple edit on this post, but I have never considered offset until a few days back. It has taken me 5 posts to get close to what I think is right, if it is right. Instead of making a different post to verify it, I tagged on, please check my math.

Tire size differences Original 215/50-17 new 205/60-16
https://www.discounttire.com/learn/tire-size-calculator
Offset diagram
https://www.tirerack.com/images/wheels/tech/offset.gif

PrairieLEAF
Posts: 200
Joined: Tue Sep 10, 2019 8:58 am
Delivery Date: 04 Feb 2019
Location: Weld County, Colorado

Re: Leaf wheel questions

Sat Apr 03, 2021 10:17 am

That math is making my brain hurt, but I run 205/65R16 Goodyear Assurance year-round (quite a bit of extra grip, fairly low rolling resistance, and nice ground clearance) and am happy with them. They are on the original steel wheels with the centers uncovered. Long term efficiency reads 4.7 m/kWh.

The speedometer reads only slightly high...about 0.5 mph high at 35 mph. The taller tires also let me use the temp spare from a Maxima.
2016 LEAF S-30 w/QC "Lexie"

DougWantsALeaf
Posts: 2782
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Leaf wheel questions

Sat Apr 03, 2021 2:45 pm

I am thinking 205/65/16 might be the way to go. I do like the idea of a more aligned speedo. The stock tires on the S+ are off by about 2.5 mph at 70mph from my GPS readings. It probably keeps me out of trouble.

The useless upgrade side of my brain still thinks dropping the car an inch or 2 might add a little highway performance.
2019 S Plus (93.86% SOH) & 2019 SV Plus (93.35% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

jimmol
Posts: 16
Joined: Wed Aug 16, 2017 9:40 am
Delivery Date: 16 Aug 2017
Leaf Number: 318723

Re: Leaf wheel questions

Sat Apr 03, 2021 5:22 pm

I looked at the larger tire size and found, via the tire size calculator, that the speedometer would read nearly 3mph high and it would raise the car up nearly an inch from the 17" wheel.
For me, I would like to have the speedometer as close as possible while I drive around town.

I am leaning toward the Enkei Racing RPF1 and the Ecopia EP 422 Plus at the 205/60-16, if I can afford the setup. I like the idea of taking 11 pounds off the rim and 3 more off the tire, giving me a reduction of 14 pounds per tire.

One of the posts I read mentioned that taking weight off the wheel helps in acceleration but did not help in driving along. I do not recall why they said this, but as I thought of it... is driving down the road a series of accelerations to keep the speed constant? When you come to the hill on the road, don't you add power (accelerate) to keep the car going up the hill at a constant speed?

I believe they also mentioned that light wheels reduce regeneration. Hmm. If you have a 3000# mass going down a hill, it won't care what weight the tires are on the car. The go around 780 times per mile whether they are light or heavy. The revolving of the tire causes regeneration. Maybe I am wrong...


https://www.discounttire.com/learn/tire-size-calculator

DougWantsALeaf
Posts: 2782
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Leaf wheel questions

Sat Apr 03, 2021 7:31 pm

How much do the rims weight?
2019 S Plus (93.86% SOH) & 2019 SV Plus (93.35% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

knightmb
Posts: 973
Joined: Mon Jan 12, 2015 7:41 pm
Delivery Date: 26 Feb 2021
Leaf Number: 306291
Location: Franklin, TN

Re: Leaf wheel questions

Sat Apr 03, 2021 9:21 pm

jimmol wrote:
Sat Apr 03, 2021 5:22 pm
One of the posts I read mentioned that taking weight off the wheel helps in acceleration but did not help in driving along. I do not recall why they said this, but as I thought of it... is driving down the road a series of accelerations to keep the speed constant? When you come to the hill on the road, don't you add power (accelerate) to keep the car going up the hill at a constant speed?
Technically, lighter wheels, reduced weight will. But... drag is what hinders the acceleration. Before hitting wind resistance, the more drag the tires have, the slower the acceleration. That is why inflating the tires increases acceleration, you are reducing drag and traction also. Too little traction and you just burn rubber and go nowhere. You have to find the balance between enough grip to accelerate but not so much it drags or so little it just slips. Driving down the road is a waveform of acceleration and deceleration.
I believe they also mentioned that light wheels reduce regeneration. Hmm. If you have a 3000# mass going down a hill, it won't care what weight the tires are on the car. The go around 780 times per mile whether they are light or heavy. The revolving of the tire causes regeneration. Maybe I am wrong...


https://www.discounttire.com/learn/tire-size-calculator
Physics say yes, but the amount might be 0.000001 %, so you might not really notice. :mrgreen:
2020 Leaf SL Plus - (Manufacture Date March 2020)
2013 Leaf SV (8 faithful years of service before trade in at 75,679 miles)
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