Hey how is everyone, im jason this is my first post. i love building stuff like this, its its been a pasion sense i can remember. thought i would post a chart for approx. speed of a 15:1 total reduction for both 24" and 26" tires. these are approx because i wrote this last night assuming the actual diameter of these tires is really the number they are called by, im sure they aren't. but this is fine for a good estimation, check my work i could be wrong. i hope this helps a few people out.
rpm final/rpm 26" mph 24" mph
200 13.3 1.0 1.0
300 20.0 1.5 1.4
400 26.6 2.1 1.9
500 33.3 2.6 2.4
600 40.0 3.1 2.9
700 46.6 3.6 3.3
800 53.3 4.1 3.8
900 59.9 4.6 4.3
1000 66.6 5.1 4.8
1500 99.9 7.7 7.1
2000 133.2 10.3 9.5
2500 166.5 12.9 11.9
3000 199.8 15.4 14.3
3500 233.1 18.0 16.6
4000 266.4 20.6 19.0
4500 299.7 23.2 21.4
5000 333.0 25.7 23.8
5500 366.3 28.3 26.1
6000 399.6 30.9 28.5
6500 432.9 33.5 30.9
7000 466.2 36.0 33.3
rpm final/rpm 26" mph 24" mph
200 13.3 1.0 1.0
300 20.0 1.5 1.4
400 26.6 2.1 1.9
500 33.3 2.6 2.4
600 40.0 3.1 2.9
700 46.6 3.6 3.3
800 53.3 4.1 3.8
900 59.9 4.6 4.3
1000 66.6 5.1 4.8
1500 99.9 7.7 7.1
2000 133.2 10.3 9.5
2500 166.5 12.9 11.9
3000 199.8 15.4 14.3
3500 233.1 18.0 16.6
4000 266.4 20.6 19.0
4500 299.7 23.2 21.4
5000 333.0 25.7 23.8
5500 366.3 28.3 26.1
6000 399.6 30.9 28.5
6500 432.9 33.5 30.9
7000 466.2 36.0 33.3
