I'm 6'3", and find the legroom adequate, but it's close. Wondering whether another notch back would be better. Figured there was nothing to do, but I just saw this: Prius C Seat Extender Depending on the seat tilt, it's a bit of a stretch to reach the steering wheel. So it's not at all clear it would be workable to go farther back. But is there any downside to trying? Ah, some more details here. And a YouTube installation video (for Prius, not Prius C) here. Manufacturer is ExtendMySeat.com, and their page for this extender is here. Hmmm, can you still reach the jack, which is under the driver's seat and is accessed by sliding teh seat forward?