The last digit on the head badge indicates that it is either a 1985 or 1995. I don't think the Sprint was available in '95, so it is undoubtedly a 1985, being made on the 55th day of the year. What you need to do to confirm is check out the Schwinn catalogs that are available online or on several Schwinn-related posts on this forum.
The Sprint was a lower end "leisure" bike, not intended to racing or serious road bikers. Having said that, it doesn't mean that it is a bad bike, just on the heavy side and not especially collectible.