172.5mm vs 175mm

[milky4130]

Here goes nothing: I have Dura Ace 7900 cranks with 175mm arms that I have been trying to swap for 172.5mm for ages...

 

(currently in St Francis)

I have a FSA Carbon Pro if you wanna swap? Providing its not heavier than mine?

[milky4130]

Here goes nothing: I have Dura Ace 7900 cranks with 175mm arms that I have been trying to swap for 172.5mm for ages...

 

(currently in St Francis)

Oh & that it doesnt cost me anything extra?

[Lucky Luke.]

I like my 177.5mm - been riding with them for a few years now. Longer crank arm = more torque + full range of motion muscle usage. I am 1.9m. If your knees can take it happy days.

Edited December 20, 2011 by Lucky Luke.

[Big J-WP]

I'm only 2,06cm and have short 180mm cranks on my road bike.

[The Drongo]

I'm only 2,06cm and have short 180mm cranks on my road bike.

 

[Melch]

I have not riden road in years. I used to ride 172.5mm cranks. I used to do some training at sports science on a stationary bike with power output meter. They had bikes with 170, 172.5 and 175mm cranks and I used to switch between them because the bikes got moved around and I was two lazy to get down on my hands and knees and check which cranks were on which bike. I found my default cadance was a little lower than normal with the longer cranks while the shorter cranks were easier to spin at near my upper cadance limit. Other than that I dont remember it making a difference to the effort required for a specific power output but that is not something you would be able to pick up riding from one day to another anyway.

[Raggedtooth]

I have to agree with some of the earlier posts. Getting the longer crank will make a difference but it is going to be small.