I need to slow down
Road Master
Joined: Jun 2007
Posts: 1,189
Likes: 9
From: la grange, il (near chicago)
as mentioned, have read that speedometers can be higher than actual speed but not lower.
some issues are that manufacturers can't be gauranteed of everything you do but don't want to be held liable for speeding infringements.
just a couple lbs difference in tire pressure can change your speed without changing the speedometer reading
a gps will overall be more accurate, but because of the way they work they might not be accurate at this moment. if you are accelerating (or deaccelerating) a gps will lag behind a bit. a gps will do a running average of your speed. like, how long did it take you to get from point a to point b and it will get that speed and then do it again and average the speeds for those readings. so just cruising along at a steady speed will be very accurate.
some issues are that manufacturers can't be gauranteed of everything you do but don't want to be held liable for speeding infringements.
just a couple lbs difference in tire pressure can change your speed without changing the speedometer reading
a gps will overall be more accurate, but because of the way they work they might not be accurate at this moment. if you are accelerating (or deaccelerating) a gps will lag behind a bit. a gps will do a running average of your speed. like, how long did it take you to get from point a to point b and it will get that speed and then do it again and average the speeds for those readings. so just cruising along at a steady speed will be very accurate.
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