This is for my fixed gear road bike, but I'm sure someone can help. I've got a fixed/free hub and want to ride with 2 different fixed cogs, who even uses a freewheel on a fixie anyways? :thumbsup: I could buy a a new hub and have it laced to my rim but I'd rather find a cheaper way. I want to steer clear of the Rotafix method because I just don't trust it. I've heard people say you can use a lot of locktite..but I'm skeptical of that method holding up as well. So basically I narrowed it down to 2 solutions..1. seeing if a machine shop can cut a reverse thread into the freewheel side for a cog and 2. threading a cog on with a lot of locktite, then putting a bottom bracket lockring with locktite on behind that and just make sure I check it every now and then. I play a lot of bike polo and practice some tricks (plus I'm 235lbs) so there is a lot of back pedalling. I want something that will hold up well, even if I have to check it every ride. Any solutions or ideas to consider?