Depends on the specific parts mixed. There's no question that it can be fine...e...

		Unman on Jan 15, 2017 \| parent \| context \| favorite \| on: Flat Pack Chainless Bicycle from IKEA Depends on the specific parts mixed. There's no question that it can be fine...e.g. see http://www.velonews.com/2013/09/bikes-and-tech/drivetrain-co...