Originally Posted by
Witterings
Probably wrongly so but I've never thought about this .... I'm guessing though if I can sit on the bike and comfortably put both feet on the floor then it should be OK???
No, that just means the saddle is to low.
And besides, even on a bike that is way too big, you can probably lower the saddle enough to touch the ground.
The one I tried today which was a medium I would have raised the saddle from where it was if I was actually out riding the bike so it'd be nowhere near it's lowest position and I could comfortably stand with clearance over the top tube ... is that all you look for???
First of all, if your are going to try out a bike, raise (or lower) the saddle to where you need it to fit you properly. Otherwise, you are wasting your time, as you won’t really know how anything else about the bike fits.
Standi over clearance over the top tube is largley irrelevant to whether the bike as a whole fits. I mean, if it is important to you to have that clearance, then make sure you have it, but it tells you little on whether the stack and reach* are what you need.
*Google “stack and reach”.