Help me choose a ruby size?

Hi everyone,

I'm new to WSD bikes and am very excited about purchasing a specialized ruby comp. I am 5'6", with an inseam of 77cm. This calculates out according to the bike-fit guidelines to a frame size of about 52.
When I ride the ruby 54cm, I get a cramp in between my shoulder blades and have a bit of trouble in the wrists. The 51cm feels much better-- but is there some downside to getting a smaller bike? Something I might regret later?
Anyone with similar measurements? I'm curious to know what size you all have. I tried a Trek 5000 WSD in a 54 and it felt too big, and then the 51 felt too small, so I'm confused...

thanks!

I have a Ruby Expert and I think I'm about the same size as you. I have a 54 and the lbs just shortened the stem for me and now it's perfect. I love love love my Ruby.

at least 2 carats!

amgdjp,

I think the bike shop folks are in a much better position to evaluate which size bike will fit you better. The shoulder blade soreness could be caused by a lot of different things -- the bike size, the handlebar width, the handlebar height, stem length -- just to name a few.

I may be able to help clear up the confusion about sizing on the Trek vs. the Specialized. Trek measures bike size from the center of the bottom bracket to the top of the seat tube, most other manufacturers measure from center to center. A 51cm Trek is like another manufacturer's 49cm, which is why the 51cm Trek felt really small to you.

Does that make sense?

-- Melissa

totally makes sense- thanks!

stand over + seat tube measurements, though most shops use them as a fitting start point really aren't the best way to get your ideal bike size too. I'm leggy enough to be riding a 48cm (I have a Ruby btw), but my upper body and arms are short, so even with my 44cm I had to shorten the stem! If I went solely by inseam I'd be riding a bike that is way too big. If the 51 feels better it likely is. If you can get them to do it - if anyone in the shop really knows how to fit a bike!, have someone who will look at more than just whether or not you can stand over the bike put you on both of them and see which suits your entire body better. They should check your knee/crank position and your reach at very least.