The ratios:
Here are a few baseline ratios-
Quote:
A stock gearset has
Bevel to Motor Pinion Ratio: 30:10 = 3:1
Spur to Bevel Ratio: 39:10 = 3.9:1
Sector to Spur Ratio: = 32:20 = 1.6:1
Final Ratio = 3 x 3.9 x 1.6 = 18.72
Prometheus gears have the following:
High Speed 16.46
Standard 18.72
Double Torque 23.79
Triple Torque 26.43
Here is a standard Systema/CA STU gearset ratio-
A. Bevel to Pinion Ratio: 30:10 = 3
B. Spur to Bevel Ratio: 40:8 = 5
C. Sector to Spur Ratio: = 32:18 = 1.78
3 x 5 x 1.78 = 26.7
Here is one popular mixed gear combo: STU SECTOR + STU SPUR + STOCK BEVEL(ten teeth on the smaller cog)
A. Bevel to Pinion Ratio: 30:10 = 3
B. Spur to Bevel Ratio: 40:10 = 4
C. Sector to Spur Ratio: = 32:18 = 1.78
3 x 4 x 1.78 = 21.334
Take note that this puts it's ratio somewhere between our stock gears and the prom double torque gearsets. Perfect for PDI190, SP120, M120 springs with small batts. Also perfect for SP130, M130 springs with Large sub-c batts or lipolys.
Another similar combo would be to use Stock STEEL SECTOR and SPUR GEARS(TM gears not recommended) + the STU BEVEL(8teeth on the smaller cog).
A. Bevel to Pinion Ratio: 30:10 = 3
B. Spur to Bevel Ratio: 39:8 = 4.875
C. Sector to Spur Ratio: = 32:20 = 1.6
3 x 4.875 x 1.6 = 23.4
Notice that it has a higher ratio than the first combo, pushing it closer to the STU ratio but a bit faster. Which is why some players who wish to economize, often split a set of STU flat gears between themselves instead of buying TWO SETS of double-torque/torque up gears. One player gets the STU spur, while the other gets the STU bevel.
