Bicycle cogs again say you have 5 gears, your 27t can turn the biggest gears easily, but only up to a low revolution, but an 8t can spin the 2nd gear 8 times as fast, but it can't accelerate with the bigger gear at all.
You have the cogs the right way round, a larger primary cog does give you less torque, however, this is just to make up for the fact that the motor driving it has oodles of torque, so it doesn't need to gain any more in gearing, if that makes sense?
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