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Howard
@svenhöek
Saint lever from 2012 push more oil: at 2.15:
http://www.youtube.com/watch?v=iPEMDigIGoM
and piston area is larger: Zee, Saint: 16mm small, 18mm large = 20% area increase
thread on mtbr.com
Difference between hylex 21mm and shimano 22mm = 10% area increase