Originally Posted by
guadzilla
Would a heavier rider shift the break point to the left or the right, compared to a lighter rider?
To the right. Higher load needs more stiffness in a suspension system to create the same amount of vertical interaction. More pressure for the same sag, more force to create a given amount of vertical deflection in the sprung mass. Same reason that suspensions on mountain bikes are tuned stiffer for heavier riders.
Originally Posted by
guadzilla
Possible reasons I can think of:
4) Zipp and ENVE are pushing hookless rim manufacture, and current ETRTO guidelines limit hookless rims to a max of 5bar/72.5PSI.
The
big issue is that optimal setup is a highly multivariate problem, and the differences that need to be measured to give real answers are very small. It would take a pretty broad study to thoroughly sort things out with good accuracy and precision, and the cycling industry just doesn't have a very large or unified R&D budget.
Pertaining to this graph, another fun question is what the shape of the vibration loss curve actually is. It's probably somewhat sigmoidal, since the vibration losses won't just keep increasing as pressure increases: at some point, the suspension system will be transmitting pretty much everything that a surface can transmit, and further stiffening won't do anything to change that.