No. It's harder to maintain the same cadence with a smaller chainring. The higher the gear (e.g. a 70 inch gear compared to a 75 inch gear), the harder it is to turn the cranks.
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I would think that it's easier to maintain cadence with a smaller chainring. Are you referring to gear inches? If so, isn't it easier to turn the crank with 70gi gearing than it would be with 75gi gearing?
Coming from motorcycles, I never got the 'taller' and 'lower' thing straight. When you put a smaller rear sprocket (cog) on a motorcycle, you were lowering the gearing. It seems to be the opposite on a bicycle. Same is true if you put a larger main sprocket (chainring) on a motorcycle.
Anyway, I know spinning is the key. And if I'm more 'comfortable' spinning with a smaller chainring or larger cog I think it might result in a small increase in average speed.