JamesM
Senior Retro Guru
Re:
There is a lot involved when it comes to front mechs. As well as chainline, chainring size and pull ratio, the angle between the seat tube and chainstays, and the range of the cassette all make a difference as to whether or not it's going to rub in some gears. Sometimes you just can't get it to work with the parts you have. The problems normally arise when you are trying to build something that's a bit odd ball with a mix of modern and retro, road and mtb etc. Your road bike one probably worked first time because it's the right mech for the job.
There is a lot involved when it comes to front mechs. As well as chainline, chainring size and pull ratio, the angle between the seat tube and chainstays, and the range of the cassette all make a difference as to whether or not it's going to rub in some gears. Sometimes you just can't get it to work with the parts you have. The problems normally arise when you are trying to build something that's a bit odd ball with a mix of modern and retro, road and mtb etc. Your road bike one probably worked first time because it's the right mech for the job.
