With all the rain here in Washington state I wasn't getting out on the bike so I set up my Terra Trike with a block under the back tire so that it would spin freely. Next I took an old bike frame and turned it upside down and placed it behind the trike. Into the back triangle a wilderness energy hub, with rim only, was held securly to the rear tire of the trike with the use of two rubber snubbers. The hub is a brushed type and when it is turned it produces enough dc current to power up two car head lights. I think it's better than spam.