I have a 'Quick' question. Har Har.

What's the widest tire that is acceptable on a Cannondale Quick? I have the 2016 Quick 4, but I assume it's generally the same across all the Quick models. Mine came stock with 30's but I was definitely wanting to go wider, 35/38 if possible. Anyone have solid evidence? I know all tires size differently, just trying to get a ballpark max size.

Thanks in advance.