are there speedo gears with different gear ratios on the market (Toyota)?
a little update above...(5th gear, 3.23 rear, stock 14" wheels)
OK, looks like the orig speedo is reading about 20% lower than reality. That size in a BFGoodrich Radial T/A goes a mile in 806 revolutions, so with 3.23's and a 0.75:1 overdrive, the engine should be turning 1,953 rpm. So: 45 kmh (28mph) = 911 rpm 60 kmh (37mph) = 1,204 rpm 100 kmh (62mph) = 2,018 rpm 200 kmh (124mph) = 4,036 rpm (autobahn, right?)
You COULD get a tire that was 20% smaller, but that would look rediculous. Maybe a speedometer shop could recalibrate your speedo? Or maybe keep the GPS in the car...
