Even less is correct: outdoor fibers (G.652.D) have a minimum bend radius of about 30mm. The indoor counterpart (G.657.A1 and A2) have 10mm and 7.5mm.
Like I have fiber to the house and you really need to pinch it and whatnot to cause an internet outage.
A large bend radius means it has to be a big bend.
A 7.5mm bend radius is really small. You can bend that stuff pretty tight before you create a problem.