When I was hot rodding in the late '60s, I spent a lot of time researching how tire size and different differential gear ratios affected speedometer accuracy. I bought a lot of different speedo drive gears for the tranny (this was on a GM TH400) to compensate for the changes I made. All this just to keep my speedo as close accurate as possible as I didn't want to speed and collect tickets. Now someone tells me that after putting in larger diameter tires on his car (Honda Element), the tire dealer said that his speedo would still be accurate. I find this hard to believe. Are today's electronics intelligent enough to automatically adjust for different diameter tires? I would think at least something needs to be manually re-calibrated? This is a good group to get information even though this is not a Toyota specific issues. Thank you.
- posted
17 years ago