The twisted belt can be replaced by gears to achieve the same effects.This is equivalent to the twisted belt with identical size pulleys top and bottom.
In such an arrangement, there is no speed at which the one wheel will not forever slip at dvt=2.
The size of the yellow idler gears has no effect on the relative rate of turn of the wheels. The only size that matters is the red gears, and you drew those the same.
You also drew the arrow for the large yellow gear larger than the smaller one. The smaller one will turn faster, but indeed, the actual wheels with the red gears will turn the fastest as you have drawn them.
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