Originally Posted by robabeatle

For about $20, you can buy a rare earth magnet on Amazon and stick it on your frame right near the front drum, very close but not touching (assuming its aluminum). I do this with my old Krietlers and it is plenty of resistance now. Here is the one I use:

Applied Magnets ® 2" X 1" x 1" Super Strong Rare Earth Neodymium Block Magnet: Lift Magnets: Amazon.com: Industrial & Scientific