Quote Originally Posted by BMWST? View Post
never understand why some nice enclosed chain designs have never taken off.Would solve the dirt problems and prolly increase the life of a chain.esp tourers sport tourers and cruisers
Best guess? Because they look utilitarian. Utilitarian doesn't sell. Race styles do.

You're absolutely right about increasing service life, roller chain was always meant to be run in enclosed compartments and sprayed with oil. We're just lucky that it tolerates running out in the breeze as well as it does.