Gear changing mechanisms. Can anyone give us a description about the variety out there? Last time I had a road bike, both levers were on the down tube (the diagonal bit that goes from beneath the handlebars to the bottom bracket). When I came to test ride my Trek 1000, I was startled to find that I had to use the brake levers and some little nubbins on the brake lever hoods.
This system is Shimano Sora FlightDeck (or so it says on the hoods). The left brake lever controls the big chainring. To move from a smaller chainring to a bigger one, I push the brake lever rightwards, towards the centre of the handlebars, until the chain ascends, then release. To move the chain to a smaller chainring, I press a little nubbin on the inside of the hood, pretty much under my thumb if I'm riding on the hoods. To change the rear cogs, I do a similar thing, in a mirrored way, with the right brake.
Would anyone like to describe the alternatives, and the pros & cons of each? This may get complicated as we get into the tri-specific options, but I think it's a valid topic for bike numpties; I was completely thrown by an entirely different system than that with which I'd grown up.