I got a funny question! Yesterday I do compare the speed indicated on my TT-One and the speed indicated on my car's speed gauge and there's a slight difference. When my car's gauge indicate 120 KM/h, the TT-One indicate around 117 KM/h. I think it's possible than my car's speed gauge was not accurate because I use smaller winter tires than original size (narrow tires give better grip on snow).
Anyway, I'm just wondering if the speed indicated on the TT-One (or any GPS) was accurate or not really?
Anyway, I'm just wondering if the speed indicated on the TT-One (or any GPS) was accurate or not really?