One day Bike tour in Tuscany?

We've used Cicloposse for a multi day self guided tour - They are great! Here's the link to their ONE day tours:
http://www.cicloposse.com/day-bike-trips.php

Also you can use: (we bought a bike jersey from them, but haven't used their service)

http://www.florencebybike.it/en/chianti-tours/

Also Viatour...they offer many different types of tours. We are signed up to do a one day hiking trip out of Florence next year. Haven't used them yet, but they are well known and the feedback looks good.

http://www.viator.com/tours/Florence/Tuscan-Country-Bike-Tour-from-Florence-Including-Wine-and-Olive-Oil-Tastings/d519-7102BIKETUSCANY

Thanks so much. The companies you recommended are good with where we're staying in Chianti.