That's a correction factor to a 1 ft radius so I can accurately say "X" amount of ftlbs to the road instead of into the rear axles; which is way less meaningful.
Example
285 crank ftlbs x2.45 trans gearx3.54 rear gear maths out to 2472ftlbs into the rear axles. If your tires were a 24 diameter and so a 1 ft radius, then to the road would also be 2472 because the correction factor is 24/24=1
If you had a 5ft tire the correction factor would be 24/60=.4 so then, to the road would be 2472x.4=989 and your teener is not even gonna squawk that,lol.
But your 30s are 24/30=.8 so you get 1978 to the road, enough to break the loose.
Doing it this way allows an apples to apples comparison when comparing performance changes due to tire height changes.
I know, clear as mud
