That's the ratings on the door jam for the 35is. Seemed high to me. And, it is lower than the max tire pressure on the sidewall.
'08 Alpine white E92 M3 with DTC--Sold
'12 Alpine white E92 335 Xdrive with slush box
'07 Summit white Chevy 2500 HD Duramax/Allison
'12 Alpine white Z4 35is via EuroDelivery June 4th