In with the new, and out with the old!\nIn 2021, that meant in with more electronic groups, and out with shifting cables.\nOn the top end, new 12-speed semi-wireless Shimano Dura-Ace and Ultegra groups were big news, and the more affordable Rival eTap AXS group in SRAM's third-tier slot was also worthy of praise.\nWhat else made the list of the biggest gear stories of 2021? Tune in and check it out.