I have a DaCurve from '17 which has 220.5cm on the board's decal but if I measure it or look on the website it is 230cm. They might be a little slack with their info.
Mark _australia said.. Lots are 69 wide, can't seem to find what year it was 248 long. Googling not helping, someone will know here, there's always one
Its a CAD file that claims to be Rocket 125 ........ I reckon its too short at 248cm as I found a table showing every rocket and none are 248 but its possible that table missed a model. I lean towards dopey computer operator, I reckon its supposed to be 250 but wont assume just yet
