Originally Posted by hexron

Thanks all for the advice! A couple cm can indeed be big - at least in handlebars I've noticed this.

Originally Posted by jsigone

smaller circles for the knee, less angles, makes sense to me if you have knee problems. My new bike came with 172.5, normally been running 175s for yrs. I can't really feel the difference normal riding, but seems easier to spin up to speed. Mt seat to bar drop is a smigg bigger. It worked for me.