luckydog125
Member
So I have an odd question that I hope someone can help me understand. I put larger tires on my new 2021 RAM 1500. I have not had a chance yet to calibrate the speedometer so I know that I am going faster than the speedometer indicates. I was using Waze and a "Speedometer" app on my iPhone and I see a difference of about 4-5mph. No problem - I expected that. What is odd and confusing me is when I am plugged in to Apple Play using a cord, Waze and the seperate Speedo app are showing the same speed that the truck shows. When I unplug from Apple Play, it shows the 4-5mph difference. How is this possible? When plugged in, am I not on GPS and the Apple Car Play is somehow tied to the speedometer? I found this to be very odd!