Originally Posted by
Seanna5169
Possibly since the arc is longer my legs need to get use to it ??
Shorter cranks?
You didn't say how tall you are. But, you should be fine. 2.5mm difference in length. You'd probably never have noticed if you hadn't looked at the labels.
Two competing physical things.
Longer Crank Length ==> More Leverage (increases linearly with crank length).
Longer Crank Length ==> Longer circumference of crank circle (also increase linearly with crank length).
So, the two are a wash. The energy is the same. You may find you're doing a slightly higher cadence in slightly lower gears with the shorter cranks.
As long as both sides are the same, your body will get used to it.