Im 5 feet 8 inches tall and am having a hard time choosing between a size 54 or 56 road bike. A 54 is 5'6"- 5'10", and a 56 is for a 5'8"-6'0" rider. Which is better fitted for my size? I measured my inseam and I was a 55. Looking at buying a specialized Allez elite bike if that helps.