I just got an Ion Speed Pro camera for that purpose -- to record rides for safety/documentation purposes. It wouldn't have been my first choice but the sale price (under $70 this week at Amazon) and Sunday same-day Amazon delivery made it tempting. Haven't used it yet, I had to charge it first this afternoon.

I'll report back this week after using it a few times. Based on my experience with other video cameras -- not "action" types -- I'd expect the best results from 60 fps, regardless of whether it's 720 or 1080. With my other video cameras 1080/30 fps had too many blurred frames to reliably record license plates, while the slightly lower resolution 720/60 fps showed better fine detail because there were more opportunities to snag at least one clear frame without motion blur.

My first impression about the Ion Speed Pro:

• The camera itself feels very well made, with an aluminum body and good fit and finish.
• With an outboard battery (not included) it can be used and charged simultaneously, extending the run-time beyond 2 hours.
• It's larger and heavier than I'd expected. I probably wouldn't choose it for helmet mounting. And it didn't include a helmet mount.
• It included a fairly complete mounting kit for bicycles, motorcycles and cars, but no helmet mount.
• I'm not crazy about the handlebar mount, especially the plastic ballhead. I already had a plastic ballhead mount that was larger and stronger, and it still transmitted too much vibration. I'm not sure whether any metal aftermarket mounts are adaptable to the Ion Speed Pro.
• The micro-SD cards are tiny and fussy and possibly unnecessarily small for a camera this size -- a regular SD card might fit, if they'd eliminated the HDMI port.
• The few controls seem simple enough, but the instructions and user feedback indicate the Ion may be fussy to set up -- it seems to require a computer for initial setup, so it's not quite usable straight from the box.

If I'm not satisfied after a week or so I may return/exchange it for the similarly priced Contour Roam 3 or Polaroid Cube -- although both of those models have their share of fans and critics. But for well under $100, these all seem pretty good.