>>1754635>full retard to just claim both will work without doing the mathYour 'math' says both 56 and 58 can easily have exactly the same fit
Pic related is a geometry overlay of the CAAD13 56cm and 58cm alligned at the bottom bracket.
As you can see it's just a matter of removing some spacers and using a 6mm shorter stem to get identical fit on the 58cm as on the 56cm.
>MIGHT affect steering?It may or may not, because a 6mm difference in stem length is so subtle that you propably wount notice even in a side by side comparison.
The 56 vs 58 diference isn't that important as long as you get different stems for fine tuning, you're just too brainlet to understand.