Your options are tough. You could patent and try to sell the idea to manufacturers. Or you could try to manufacture yourself. If you try to sell to manufacturers and it's actually a good idea, they are going to steal it and squash you in the dirt probably. Shimano has WAY deeper pockets than you. I personally like self manufacture idea. Get a patent, write a business plan, get a loan. Venture Caps are vultures. They will more than likely want majority control of your business, kick you out if the item gets hot and leave you with nothing.

Like mentioned before, don't mess with the "Invention" people you see on TV or hear on the radio. They just charge you $800 to do something you could of done yourself for like $10 and are of real no help.