Shimano ultegra r8000 double 11 speed chainseteagerly anticipated the updated shimano ultegra r8000 double 11 speed chainset has arrived featuring clear improvements on aesthetics and performance from the 6800 series the ultegra r8000 series has hugely benefited from the trickle down technology of its big brother dura ace r9000 transfer power into speedinfused with state of the art technology the shimano ultegra r8000 double 11 speed chainset will make sure you transfer power into speed wi