Frame sizing help needed for Cube Attempt road bike
Hi guys, need some help as I'm completley new to road cycling and looking to buy a half decent bike to get started..
my height is 180cm (5ft 11)
my inside leg is 80cm (31.5 inches)
and my arm length (if I've measured it correctly is 81cm (from my shoulder to tip of my fingers
basically I tried out a Cube attempt in 56cm today and it felt okay for the first time tried out a proper road bike- handlebar position/ seat position/ etc and I had about 1cm clearence of standover height however the sales assistant recommened that an Eddy Meryckx AMX1 bike at 54cm was a better fit altough he had to put a shorter stem on it and I had no standover clearance at all- I'm sure the guy knows his stuff but any other Cube attempt riders with similar measurements to myself and if so based on my measurements would you say the 56cm would suit or is the sales assistant right...
cheers and any help is appreciated...(ps I've tried looking at sights like Sheldon brown and have spent over 3 hours looking into bike sizing on the net but I'm still no further forward ) lol