Took the mtb today since the fixie's making strange noises. Must be all the road salt in the hubs and bb. I swapped out the slicks for knobbies a few weeks ago and took the rack and fenders off so I could go mtb'ing. I also wore boots instead of cycling shoes. Needless to say, everything felt weird. The vibration from the knobbies, the extra bounce in the tires, coasting, pedaling, changing gears, etc. Made it to work fine, but it still felt like a bike I'd never ridden before. Weird.