This is meant for those who like to know more about what their car is doing and be more in control.-- BJS, Nov 30 2006 (The manual car I drive doesn't even have a tachometer for the engine...)-- BJS, Nov 30 2006 Isn't that called a speedometer?-- discontinuuity, Dec 01 2006 Not quite. The spedometer only measures the rotation of the drive wheels, and many times, only one of them. I would also like to see something like that on my car. I'm not sure how many times it would come in handy for normal street driving, but for off-roaders and rock crawlers, I think it could definitely end up being worth the trouble to make one. [+]-- Hunter79764, Dec 01 2006 The 07 Acura MDX has a similar idea. It shows % engine torque per each drive wheel... A wheel tachometer would be a neat thing to view during turns or when there is a loss of traction (ie: only one wheel spinning) [+] as long as it is mounted somewhere not taking up more space in front of the steering wheel. Heads up display maybe?-- acurafan07, Dec 01 2006 This could be done by using the anti-lock brake sensors on each wheel: count the pulses.-- Ling, Dec 01 2006 Why are you that concerned on the road 90% of the time the wheels at going the same speed.-- dev45, Dec 01 2006 random, halfbakery