this post was submitted on 11 Sep 2023
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Based on 45k rpm mentioned in another comment and picking, idk, a 52mm diameter wheel (they range from 48-60) that's 163mm circumference.
45k rev/m x 60 m/h x 163mm/rev x 1km/1e6mm
= 440kmh = 273mph.
(I probably messed up something but idk)