Really? They make a 51 and a 55, but nothing in between?

Anyone have any experience with the Storck way of sizing frames?
I normally ride a frame on the low end of 54.
Which way do I go with the Storck Absolutist?

for your current bike:

effective top tube length?

headtube height?

stem length?

also, are you sure they don't make a 53 -_-

The effective top tube of the 51 is 54.9 cm which is about the same as a Specialized size 54.

edit: wow, their website sucks!