I went from 172.5 to 175 because of a bargain, ended with knee problems, so went back to 172.5 in a spendy way. Few years later a new bargain came along in 175 which I could not resist. No more knee problems due to improved flexibility. But eventually back to 172.5 because it's just more comfy with high cadence. Christ the money I spent on bike stuff...
I went from 172.5 to 175 because of a bargain, ended with knee problems, so went back to 172.5 in a spendy way. Few years later a new bargain came along in 175 which I could not resist. No more knee problems due to improved flexibility. But eventually back to 172.5 because it's just more comfy with high cadence. Christ the money I spent on bike stuff...