I always love listening to a whole bunch of rap while I'm riding, especially these songs:
- Any of the Ratatat Remixes (search for their 2 albums online)
- Wyclef Jean
- Young Jeezy
- Any of the Diplomats crew (Juelz, Cam'ron, Jim Jones, etc.)
- Mixtapes and such off mixtape sites.
There's so many more. Just use last.fm or Pandora to find music to ride to. There's so much out there.