Sram gx 1400 11 speed chainset bb30the sram gx 1400 bb30 11 speed chainset is the lightest model in the gx range due to its hollow forged crank arms which feature srams oct open core technology this construction not only ensures a low overall weight it provides a strength and stiffness far beyond any sold forged type the gx 1400s x sync chainring provides unrivalled durability and chain retention even over the roughest terrain and clears mud well thanks to specific recesses so you c