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@gbj_tester
Some people have suggested that even the Hed3 is marginal for sprinting, but it's much stiffer than 1st Gen Spoks. Current Spoks (~30N/mm), though, are only slightly flexier than Hed3s (~35N/mm) Wire spokes are the way to go for axial stiffness - even something as lightly built as a Shimano RS80 achieves over 40N/mm.