estomax wrote:for those with navigation you can adjust the speedo error slightly through the nav screen. there is a thread about that here somewhere. You can do a -2.5% offset and get your 205/55r16 to read dead on. Otherwise the 17" wheel Leafs are a bit bigger OD than the 16" (215/50r17), so going with taller profile could correct speedo error. My SL (with the aforementioned tires) has less than half mph speedo error compared to GPS at 65mph.
The method to adjust the speed calibration through the nav system is in the thread titled "Speedometer Reads 6% High". I believe the steps to bring up the service screen were - Turn the audio power off, then press Map, Map, Map, Audio Power, Audio Power, Map. I have tried this on my 2018 SL with no luck.
I noticed the stock 16" tires for the 2018s are 215/55R16 rather than 205/55R16 on earlier models. The 215/55R16s are only 0.8% smaller diameter than the stock 215/50R17s so maybe Nissan has removed the option to calibrate the speedometer. I already have a set of 205/55R16 winter tires that I'd like to use so if anyone has found a way to adjust the speedometer on a 2018 please let me know!