If you want to confirm the manual's gear ratio, keep in mind the Goblins use a 2 stage pulley and it is easy to calculate the true GR.
Calculating the gear ratio is simple:
(stage1GR) x (stage2GR) = GR
I will use my Goblin 700 Black Nitro as an example:
motor pulley = 28T
drive pulley = 60T
60 / 28 = 2.14:1 gear ratio
Drive pulley = 19T
Main mast pulley = 68T
68 / 19 = 3.58:1 gear ratio
Compound gear ratio
2.14 x 3.58 = 7.66:1
On the eGoblins, just replace the stage 1 gear ratio with the correct values for motor pinion and the drive pulley.
I think stage 2 is the same.
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