Posts: 1742
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: 2018 LEAF S speedometer accuracy issues?

Thu Aug 22, 2019 8:36 am

alozzy wrote:
Wed Aug 21, 2019 9:46 am
It seems odd that the 205/55R16 was the chosen tire size instead of 205/60R16 or 215/55R16 - either would be within 1% of the diameter of the 215/50R17
This - buy 215/55 R16 when shopping for replacement tires. With 40psi inflation, expect almost 2% correction to the speedometer.
Agreed.. If you absolutely must have a more precise speedometer, then you can go on the tire size website and find a size that will give you the right diameter and circumference.. .

HOWEVER, how do you know that your GPS is giving you a perfectly accurate speed? Moral of the story - you cannot expect exact precision in life....

Posts: 10
Joined: Wed Jun 05, 2019 10:45 pm
Delivery Date: 06 Jun 2019
Leaf Number: 311892
Location: Mesa, AZ

Re: 2018 LEAF S speedometer accuracy issues?

Thu Aug 22, 2019 5:01 pm

powersurge wrote:
Wed Aug 21, 2019 5:27 am
The original poster states several different issues in his description. First, just because people drive fast in Arizona, you should NEVER be driving at 75MPH in a Leaf. Second, GPS speeds DO NOT have to perfectly match your speedometer... All measurements in life are really just general indicators of what you are measuring.

If you are going 75MPH and you say there is a 4 MPH difference, then there is a 5% difference, which is to be expected.

Unless you are doing scientific measurements, there is no reason that your speedometer must be perfectly precise at all possible speeds. Heck, no car has a perfectly calibrated speedometer, odometer, or even thermometer.

We just have to accept that life (and the world) is not perfect....
I am seeing a 3/4 MPH difference with cruise set at 35. So more like a 10% difference. I assume it is off more at 75 MPH but haven't tested it besides using a GPS app which I understand is not exact.

Why should someone NEVER drive 75 in a Leaf? Other than sucking the battery life much quicker than usual, does it actually degrade the battery capacity or something? Some freeways in AZ have a 75 MPH speed limit. It seems downright dangerous to drive significantly under the speed limit. At least in this state.

Posts: 1
Joined: Sun Sep 29, 2019 11:44 am
Delivery Date: 29 Sep 2019

Re: 2018 LEAF S speedometer accuracy issues?

Sun Sep 29, 2019 11:57 am

I have 2019 Leaf S leased in April 2018. I recently noticed that the odometer is moving faster than the actual distance by about 3%. With a leased car it is a problem. I have 45000 miles for 3 years and with 3% faster odometer it will give me only 43650 actual miles.

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