Well I just tried the 16t. It seemed (I have no way I've truly measuring this, I need to flog bundyracers laser thermometer sometime) to run cooler for the first part of the run and then when I started really hammering on it (harder than with the 17t) it didn't seem to get any hotter than before when I was being gentler on it with the bigger pinion? I really need a proper measurement here as I can only go yep feels cooler now sort of thing.

Kieren