172.5 crank vs 175 crank

[jiggs]

I'm 1.8 m and has change my crank from 50/34 172.5mm to 175mm 53/39. How does this influence my bike set-up.

[Cippo]

Why did you change the cranks, out of interest? Changes could be minimal in terms of leverage in relation to power transfer to pedals. Your leg length is more relevant than your height when it comes to your crank length. My ideal crank length should be 175 but 172.5 is more than adequate after doing an Ergofit setup. It might influence your seat setback though. Best is too get an Ergofit or BG ft one to make sure.

[jiggs]

Thanks maybe will try the Ergofit. It was the only standard BB30 crank available at the time.

[Vinnydabutcher]

Im old school.

 

Ride it and see.

 

Personally - only your woman would notice an extra 2.5mm

[Giant]

logic would say that you drop your seat 2.5mm