You piqued my interest: 35 sec difference in flo’s model of Huez, comparing 30/30 to 90/disk.
[edit: correction... 23 sec]
http://flocycling.blogspot.ca/...o-vs-weight.html?m=1
[edit: correction... 23 sec]
http://flocycling.blogspot.ca/...o-vs-weight.html?m=1