Available in tubular only, 650 or 700. Shimano cassette or fixed gear. Hubs are wheel-specific, two sealed bearings on the front wheel, one sealed cartridge on the rear non-drive side and ¼” loose ball-bearings on the drive side. We recommend carbon specific brake pads for the H3C.
So they think you shouldn't be swapping them around.
HED site says...
So they think you shouldn't be swapping them around.