I know this kind of question gets asked all the time and I've actually tried searching around a bunch but to no avail. Frankly, I need help sizing for a Steamroller. I'm 5'9". Inseam is 826mm, torso is 660mm, and my arm length is about 635mm. I'm unable to decide if a 53cm or a 56cm would be best in this situation. I know the toptube on the Steamroller is quite long so I'm leaning more towards the 53cm. However, I know that stack and reach can come into play more importantly in this situation and am not too sure about either on either bike.

I know the quickest solution would to go test ride the bike and be fitted by my lbs but unfortunately the one in my town only carries a handful of Raleigh's, then a bunch of Haro bmx bikes. Pretty crappy selection and they've always acted very unhelpful before too.

Thanks ahead of time.