How many times while looking at a new bike have you thought, "the frame is very nice although the bike is mounted incorrectly, I might take it and then update the group-set with a better one" or "unfortunate that it's mounted with 10-speed, but it was a 'great bike. " Here it's easier done than said, according your competitiveness - and the wallets capacity - it is possible to replace all the components of your preferred brand or group-set, from the more economical and resistant to the latest most modern, light SRAM eTap and Shimano Di2 for Road and MTB. Often the best way to update a bike and giving it new life, is simply upgrading some components.