I'd leave the subtitle as is. Potential readers need to know your book is about a family cycling and cycling / adventure readers will want to know where you went. Half the titles on CGOAB don't tell where they went, drives me nuts. Without this basic info, I rarely look unless the title's a real eye catcher ("Sweating Like a ***** on a Cowboy Payday"). Choose the *right* words, not necessarily the longest or fanciest. People want a good story, but nobody wants to read a windbag. JMHO of an editor's daughter.