I'm pretty sure that increasing the diameter of the through axle by 25% would actually increase the stiffness by MORE than 25% if they were similar in every other respect.binary visions said:I'd like to see some numbers on how much the extra 5mm on the axle adds. If the 25% increase in diameter added a 25% increase in stiffness, I'm all for it, but I just have a tough time believing that it does.