Last week I fiitted new tyres to my 2015 Leaf with 33,000 km on the clock. Immediately range increased by between 5 and 10% depending on driving conditions. Also I now never charge to 100% unless absolutely necessary. I only need about 50% battery to get to and from work so I just top it up to 80% each night. I think it is maintaining the life of my battery. So far as there has been no change in range since I bought the car in April (except for the tyre boost).
Nice. I've only heard of and experienced new tyres reducing range until they wear in. What brand tyres did you get? I wonder if they're a better design compared to the originals. Do you know what pressures you were running before and after?