235 cm. Also look at the specs at the AtomIQ:
From my side one other question: I sail the Futura 101 with a condor 7.4 freerace sail as largest sail. The specs of the AtomIQ mention 7.0 as biggest size despite 68.5 cm width and 43.5 cm OFO. These dimensions are larger than the Futura 101. Is it possible to surf an Atom 100 with a 7.4 like I do with much pleasure with the Futura 101?