Taller Riders Need Longer Cranks
There are lots of myths around cranks. Longer cranks give you better leverage to produce torque, power, etc…it’s just not true. Even the fact that tall riders need long cranks isn’t necessarily true.
Cranks have commonly been linked to anthropometric measures and there is some benefit to. that for some. However, as is common, those on the ends of the bell curve lose out. Both shorter and taller riders will end up with cranks that are too long with the common calculators used.
Most of the common measures are unable to take into account variations such as shoe size, tibia/femur length, riding style, riding goals, injury history, etc that all have a bearing on the lengths of cranks you choose.
Generally speaking shorter cranks will be more forgiving and with no disadvantage at all!! There is no evidence that cycling performance changes with shorter/longer cranks. In fact, there are advantages to shorter cranks in terms of achieving more aero position, opening up the hip angle, etc.