coloradoman
Posts: 17
Joined: Fri Jun 10, 2016 7:30 am
Delivery Date: 10 Jun 2016
Location: Knoxville

Re: Taller tires = more range on highway?

Fri Jan 24, 2020 6:42 am

I have been thinking of upgrading my stock 205/55/16 to 205/60/16. I think it will help with making those bumps and pot holes seem a bit smaller. I wasn't sure though if it will actually help with my range, since I am mostly driving at 65-80 mph. I won't do it if it decreases my range. Fixing the darn spedo with it being fast by 5% would be another bonus.

Like in gas cars, taller tires generally help keep the rpms down at highway speeds which helps mpg. With electric cars, I really have no idea if it will help. I think the thing that kills the range on electric cars is wind resistance and weight.

Here would be the actual difference in diameter between these sizes.
24.9"
25.7"
+3.2%
I am thinking each tire would probably weight maybe a lb more.

GerryAZ
Gold Member
Posts: 2531
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Taller tires = more range on highway?

Fri Jan 24, 2020 8:59 am

You can go up one size in aspect ratio (middle number) without significant impact to efficiency. Tire rolling resistance makes more difference than size. I put one size larger Bridgestone Ecopia Plus tires on my 2015 and saw an increase in efficiency compared to the sport performance Continentals I had on it before or the OEM Michelins. Original size was 215/50 R17 and the Bridgestones were 215/55 R17. Also, the 215/55 R17 size was readily available and a little less cost than special order to get original size.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

coloradoman
Posts: 17
Joined: Fri Jun 10, 2016 7:30 am
Delivery Date: 10 Jun 2016
Location: Knoxville

Re: Taller tires = more range on highway?

Sat Jan 25, 2020 6:45 am

GerryAZ wrote:
Fri Jan 24, 2020 8:59 am
You can go up one size in aspect ratio (middle number) without significant impact to efficiency. Tire rolling resistance makes more difference than size. I put one size larger Bridgestone Ecopia Plus tires on my 2015 and saw an increase in efficiency compared to the sport performance Continentals I had on it before or the OEM Michelins. Original size was 215/50 R17 and the Bridgestones were 215/55 R17. Also, the 215/55 R17 size was readily available and a little less cost than special order to get original size.
Why would you see an efficency increase? It doesn't make sense. That is probably a whole inch larger in diameter. Everyone here has been saying you should have had a decrease

LeftieBiker
Moderator
Posts: 15043
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Taller tires = more range on highway?

Sat Jan 25, 2020 6:53 am

Tire rolling resistance makes more difference than size.

That is why.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Oilpan4
Posts: 1491
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Taller tires = more range on highway?

Sat Jan 25, 2020 8:35 am

I second that.

I tried to put 2 tires that were considered "average rolling resistance" according to the euro tire rating system and they killed my range, I went from 4 miles per kwh down to 3.
After 4,000 miles they had gotten a little better but I had to replace them with real high end Michelin tires with an A+ LRR.

Here is a file from a 2011 article that I found a few years ago, but now the link is dead.
tirempg.jpg
I searched around and found the only tire that could beat the ecopia was the energy saver, as far as tires sold in the US.
You do not have the required permissions to view the files attached to this post.
trumpvirus
Is going to get you.

HerdingElectrons
Posts: 184
Joined: Sat Sep 08, 2018 3:20 pm
Delivery Date: 17 Sep 2018
Location: Central Coast, Ca

Re: Taller tires = more range on highway?

Sun Jan 26, 2020 1:30 pm

In the world of PriusChat nothing trumps Michelin Energy Savers if you're doing your part behind the wheel for efficiency & they have a far larger user base to improve n factor
2018 SL Pearl White 4.5/3.9 Warm/Cold weather

09/18, 01K mi: AHr= 114.52 / SOH= 99.20 / HX= 099.70%
04/19, 10K mi: Ahr= 111.45 / SOH= 96.54 / HX= 113.82%
11/19, 20K mi: Ahr= 107.44 / SOH= 93.07 / HX= 109.96%

DougWantsALeaf
Posts: 1800
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Taller tires = more range on highway?

Sun Jan 26, 2020 2:00 pm

I find the Michelin’s on our SV+ excellent in both efficiency and road traction.
2019 S Plus (98.6% SOH) & 2019 SV Plus (94.6% SOH) Both Silver
2013 Leaf SV sold 2019
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV Leaf: 242 Highway 4.5 miles/kWh

GerryAZ
Gold Member
Posts: 2531
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Taller tires = more range on highway?

Sun Jan 26, 2020 5:30 pm

I found Bridgestone Ecopia Pluses to have much better wet traction and lower rolling resistance than the OEM Michelin Energy Saver A/S tires that came on the 2015. The OEM Michelins on the 2019 seem to have a bit better traction than the ones that came on the 2015, but I will still put something better on as soon as they wear out.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

coloradoman
Posts: 17
Joined: Fri Jun 10, 2016 7:30 am
Delivery Date: 10 Jun 2016
Location: Knoxville

Re: Taller tires = more range on highway?

Thu Jan 30, 2020 11:56 am

I am guessing 2 sets of tires of the same brand and type with different sizes, one being taller than the other will lower range for the taller one?

rmay635703
Posts: 551
Joined: Wed Jan 19, 2011 7:43 pm

Re: Taller tires = more range on highway?

Thu Jan 30, 2020 3:38 pm

205/65r16’s would likely fit fine and be cheaper to source but may kill your range if not Lrr

Return to “News & Main LEAF Discussion”