Does anyone know (or can they measure) the circumference of a 19 inch TC wheel and 4.50 tire?
I want to compare this to my Blockley 5.50 x 16 inch wheels/tires. That coupled with allowing for the differential swap should allow me to guesstimate my actual speed versus what is showing on the speedo. I plan to get it recalibrated at some point, but wanted an interim solution.
Rick
Speedo Recalibration Assistance
-
rstarkweather
- Posts: 43
- Joined: Fri Jan 26, 2024 12:32 pm
- Location: Raleigh, NC
Re: Speedo Recalibration Assistance
Rick,
Dunlop 19 x 4.50 tire at 30 psi. 28 1/4" from the ground to the top on the tire.
Dunlop 19 x 4.50 tire at 30 psi. 28 1/4" from the ground to the top on the tire.
Re: Speedo Recalibration Assistance
Most cell phones have mapping programs (eg. Google maps) that show the current GPS speed of the phone.
My TA speedometer is as much as 5 mph high nowadays so I use the cell phone speed in restricted speed zones.
The GPS numbers match the speed numbers shown on all the local “Your Speed is” signs.
The phone GPS speed will give you a good number to use for recalibration of the speedo.
My TA speedometer is as much as 5 mph high nowadays so I use the cell phone speed in restricted speed zones.
The GPS numbers match the speed numbers shown on all the local “Your Speed is” signs.
The phone GPS speed will give you a good number to use for recalibration of the speedo.