With 700x23c tyres your 46:18 is about a 67" gear. Spinning at 100rpm, you are doing 20mph, you need to spin at 120rpm to get to 24mph.
funny that because when I looked at gear inches it said 73", they never seem to be right...
@deleted started
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funny that because when I looked at gear inches it said 73", they never seem to be right...