i haven't installed the 39T sprocket yet (lazy, so lazy). i rode to the east coast of michigan on dirt today, and was so beat i decided to ride back on more paved roads.
now that the bike is run in, she runs pretty well at 55. i kept up with highway traffic for 15~20 miles before turning west and plodding along at 45 again.
the trailwings seem to do pretty well as long as whatever you are riding on/in isn't deep. 3~4" of sand is brutal, but leaf-covered trails are a snap.
lookin' for a place to happen;
makin' stops along the way - the tragically hip