suip
the main problem of problems, is the part where you travel to approaching the speed of light....My theory is that if you find a straightaway and ride your bike REALLY fast, you may speed up time around you enough to see a noticable change....of course, the straightaway would have to be the circumference of the earth (unless you had a space bike), and you'd have to go around it thousands of times....sure your legs would get tired, but it'd be worth it.