*gear reduction unit

[wolfws6]

Originally Posted by Espeefan

You won't loose much speed by decreasing the tire size 10mm. Only about a 1.123% decrease in speed overall. Not enough to worry about.

If you know what your motor's Kv rating is (RPM per volt), you could actually calculate the speeds of the truck in all three gears.

Thank you!!!!!! For answering my question.

[Lil Giants]

73 vs 83 = approx. 12% less diameter... even measuring the circumference, 230 vs 262 is 12% less.

How did you calculate it only being 1.123% decrease overall?

[Espeefan]

Originally Posted by Lil Giants

73 vs 83 = approx. 12% less diameter... even measuring the circumference, 230 vs 262 is 12% less.

How did you calculate it only being 1.123% decrease overall?

The decimal point got me Joe. My apologies wolfws6. Joe is correct. The odd number is because I thought I would convert the metric to English, to double check some roll out figures (distance traveled per revolution). Would have been 11.23%, had I paid attention.