"Manslaughter" generally has nothing to do w/any intention of harm or death. It is, in most jurisdictions, performing an illegal act that leads to a death in one way or another; or it is the performance of a legal act in an illegal manner which leads to a death. Something like that, anyway. It's been a while...
There is still such a thing as personal responsibility. There's some bad luck involved here, no doubt. Nevertheless, the cyclist was showing a blatant, dangerous, above-and-beyond the norm disregard for the law. It resulted in a death. Intention has nothing to do w/it, for better or worse.
Furthermore, while I'm venting, if he, in fact, knew he was being pursued by law enforcement, then 30 years is not long enough (That's a bit of an exaggeration, but it gets my point across nicely.). There is no excuse for running from the police.
Another interesting thing to look at is this: The courts are generally FAR TOO LENIENT in most cases. That is a fact proven over and over again, across the country. If this judge/jury found him "Guilty," surely they had good evidence and cause to do so. It's hard to second guess them when I wasn't there to hear, see, etc. what they did during the trial.