[img]http://www.salite.ch/Foto/1.jpg[/img]
45%
at about 1.5km in.
Full stats: The Scanuppia Malga Palazzo starts from Besenello and is only 8 km long. But steep. Although starting at 8% only (?), it continues with 20 to 28%! It softens a bit in the middle (13-14%) to finish at 18-19%!
[img]http://www.salite.ch/Foto/scanu.jpg[/img]
[img]http://www.climbbybike.com/mountainpictures/Scanuppia_Malga_Palazzo_7.jpg[/img]
[img]http://www.salite.ch/Foto/2.jpg[/img]
[img]http://www.salite.ch/Foto/4.jpg[/img]
Got this from [url=http://www.climbbybike.com/climb.asp?Col=Scanuppia---Malga-Palazzo&qryMountainID=3597]here[/url] and there's a report at the bottom (in pigeon English) from a guy who rode it on his mountain bike using a 22x28 gear.
This is a good site which also has info on all the Giro, Tour, Vuelta climbs with all the stats.