That is so plain wrong, Shimano STI and Rapidfire units fail all the time and are then useless, and you can only buy them in pairs, (as far as I know, anyway) and they are extremely expensive.
The Shimano is quite like a dutch bike, reliable and last for age, but when it does go wrong, boy it goes really wrong.
The Shimano is quite like a dutch bike, reliable and last for age, but when it does go wrong, boy it goes really wrong.