"Where are you going, to the bridge?"
Translation:Hova mentek, a hídhoz?
No, i and í are really neutral vowels with respect to vowel harmony. They may appear in front-vowel or back-vowel words. And words that have only i or í in them may take front or back vowel endings, depending on the words; there's no way to tell without looking it up and memorizing it. Híd happens to be one of the ones that takes back vowels.
<sigh> Thank you so much for your informative, helpful, and thoroughly infuriating response.
Take heart; there aren't very many words with only i vowels in them.
If they appear in words with other vowels, then those other ones will tell you which way the vowel harmony goes.