stickynohte t1_j6jzw4z wrote on January 30, 2023 at 9:39 PM

Reply to comment by a_cycle_addict in Where can I find one of those "Your speed:" radar signs? by i_need_a_lift

Mine is always off by 1mph, but close enough!

a_cycle_addict t1_j6k8xhz wrote on January 30, 2023 at 10:37 PM

Or is your car off by 1mph??

kneel_yung t1_j6ksqpq wrote on January 31, 2023 at 12:55 AM

no, its' the children who are wrong

stickynohte t1_j6khbwo wrote on January 30, 2023 at 11:33 PM

When I pass the speed limit signs (that I believe OP is referring to) they’re accurate to what my car is clocking. BUT maybe car + signs are wrong and waze is the correct one. The world will never know.

longhairedcountryboy t1_j6kll1n wrote on January 31, 2023 at 12:03 AM

If you double the speed that 1 should become 2.

Hiltson87 t1_j6ksz3z wrote on January 31, 2023 at 12:56 AM

It's just dumb luck if you're exactly calibrated because tires can vary in actual size vs the numbered size. More common in lifted trucks, but the bigger the tire the more your speedometer will be off and most people don't bother to change their speedometer gear to match the new tire size. It's not unusual for a regular car to be off by 1-2 mph though.

throwawayrva83 t1_j6kft1h wrote on January 30, 2023 at 11:23 PM

Mine is always off by 1mph exactly too.