Zip/Postal Code Search and Radius Search Values

Summary

Is it possible to change the Radius Search values and/or default to a specific search radius?

Content

We are utilizing the Zip/Postal Code search functionality on our careers website to allow applicants to search all of our stores within a geographic area.  Is it possible to update/change the current values (5 Miles/8KM, 10 Miles/16KM, etc)?  Also, it is possible to change the default from "Exact Match" to something else?

Our stores are clustered closely together within given markets, however, are in multiple zip codes.  We want the ability for the search to default broader then "Exact Match" to ensure applicants see additional locations that may be very close by, just in a different zip code.