Is there a preferred frame size calculator?
IMO Frame size is more than just measurements. A proper bike fitting pairs your riding style &amp; level with the frames own handling characteristics. (defined more by tubing and angles than measurement alone)

BUT... not everyone's out to get a custom bike frame made or go research their frames butted tubing or headtube angles... But I always suggest visiting a place where they know how to "fit bikes" (for racing, touring, etc) and getting advice from a bike fitter.

Don't forget to buy a water bottle and power bar while you're there, chances are they don't charge you for the advice. #smallbusiness