coloradoman
Posts: 20
Joined: Fri Jun 10, 2016 7:30 am
Delivery Date: 10 Jun 2016
Location: Knoxville

Skinny tire range extender?

Thu Oct 01, 2020 9:39 am

I got a 2019 S with steel 16" rims. I am thinking when the stock tires wear out finally, I will go with the skinny tire 195/60/r16 instead of the OEM 205/55/r16. Has anybody tried this yet? The tires appear to weight slightly less and are just slightly taller (which would be nice to get my spedo more correct). I imagine they would reduce energy consumption a bit but anybody have any experience with it?

Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Skinny tire range extender?

Thu Oct 01, 2020 11:12 am

I have looked around and can't find anyone who has done it trying to increase range and recorded results.
If I was going to do it I would just go to a 205/60R16.
I would bet on going taller rather than narrower.
Plus the higher weight rating of the larger tire would be a good match for me.

coloradoman
Posts: 20
Joined: Fri Jun 10, 2016 7:30 am
Delivery Date: 10 Jun 2016
Location: Knoxville

Re: Skinny tire range extender?

Fri Oct 02, 2020 4:50 am

I at least have another winter and spring on the stock tires, but next summer I will probably get the skinnier tires. It should reduce surface friction and wind resistance a tad.

DougWantsALeaf
Posts: 2075
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Skinny tire range extender?

Fri Oct 02, 2020 4:52 am

While i am a few years from new tires, I have thought about trying the same, but want to know if stopping distance was impacted much.

The 16" 205 vs 17" 215 does seem to be very positive for range.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% 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

flydiver
Posts: 67
Joined: Sun Mar 11, 2018 9:14 am
Delivery Date: 20 Mar 2018
Leaf Number: 337789
Location: Seattle, WA

Re: Skinny tire range extender?

Fri Oct 02, 2020 7:40 am

The basic question is sound. "Theoretically", it should work. The devil is in the details.
A poor skinny LRR tire may have worse energy consumption than a fatter good LRR tire.

Same goes for handling, traction, stopping distance, and wear. There are a huge number of variables to contend with. This makes tire choice a serious challenge. It makes opinions very difficult to sort out.

I have a Leaf, but this is my experience with a Prius. 2nd hand car purchased with aftermarket set of 17-in Enkei RPF-1 wheels with Continental DW 215/45/17 summer tires. Car got about 43mpg, tires 'performed' well, but HOWLED-very noisy, to the point I hated them.

It also came with a set of OEM wheels with Bridgestone Blizzak WS80 195/65/15 snow tires. I put them on last winter. MPG went up to 47, noise decreased to acceptable, ride comfort improved. Never was in any situation where stopping/handling performance would be tested.

Normally I would not make noise a priority. I studied tire reports and personal reviews for hours. Opinions were all over the map. I finally went with General Altimax RT43 205/50/17, a bit skinnier, and taller. Tire rotating diameter almost identical.
Noise is comparable to the Blizzak's, acceptable. Ride comfort is a little better. Performance seems fine as far as I've pushed it, which is not much. MPG is a tiny bit better than the Continental, a tad worse than the Blizzak. In all, a satisfactory purchase.
Last edited by flydiver on Fri Oct 02, 2020 10:22 am, edited 1 time in total.
2014 SL; Seattle, WA

DougWantsALeaf
Posts: 2075
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Skinny tire range extender?

Fri Oct 02, 2020 8:13 am

I would love to try a 15" 195 LRR tire on the Leaf Plus to see if could add an additional .2 miles per kWh or so.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% 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

flydiver
Posts: 67
Joined: Sun Mar 11, 2018 9:14 am
Delivery Date: 20 Mar 2018
Leaf Number: 337789
Location: Seattle, WA

Re: Skinny tire range extender?

Sat Oct 03, 2020 10:24 am

I have a 2014 SL with 17" rims. Did the early Leafs come with 15" rims, maybe with the same bolt pattern?
2014 SL; Seattle, WA

Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Skinny tire range extender?

Mon Oct 05, 2020 7:16 pm

The tire engineer I know claims that if the weight on 2 different sized tires stays the same and those tires are the same make and model but you compare the original tire size to one taller or wider or both your rolling resistance will decrease in all cases when going bigger.
But this decrease is only a few percent.
At highway speeds aerodynamic drag is what's using up almost all of your power.

So if you really want to increase range on the highway aerodynamic modification or just slowing down is the best way.

alozzy
Posts: 1601
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Skinny tire range extender?

Mon Oct 05, 2020 7:37 pm

Yup, if I had a 3D printer I would try these:

https://youtu.be/ynWNL9MpCr4

There are ones for both the 16" and 17" stock alloy wheels.

Probably only reduces aero drag a few percentage points at highway speeds, but still interesting.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
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Loving my first BEV :D

Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Skinny tire range extender?

Tue Oct 06, 2020 7:56 pm

I have investigated this and the smooth wheel covers on a car are good for about a 3 to 4% increase in economy on the highway.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

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