I have been thinking about this, from quite long ago.
Why is speed always calculated from the front wheel?
Let's just consider the following situation:-
You are in a race, and you have given full throttle in 1st gear and you have ended up in a wheelie and for 2nd gear too. Let's assume your front wheel is in the air.
In this situation, if you want to measure speed, then the rear wheel should be the correct one, right?
I would like to know, is there a specific reason why vehicle manufacturers measure speed from the front wheel?