Cannondale Si Hollowgram 172.5 mm CranksetGreat condition, 3M protective tape installed - no shoe rub, etc.Set comes complete with 109mm axle, spacers and axel bolts, it is clean, greased and ready to install. With the provided spacers, it will fit a PF30A bottom bracket (73mm width). If you want to install it in a PF30 or BB30 shell (68mm width) - basically Cannondale frames build before 2015 - you need to replace the 2.5mm spacer on the non-drive side with a 7.5mm spacer or simply add a 5mm spacer (these spacers are widely available).The Hollowgram SiSL design looks distinctive, much nicer and classier in my opinion, especially with the OPI CNC-machined chainrings, then the new Shimano or SRAM chainsets, and it is one of the lightest cranksets on the market.The 172.5 mm arms are more difficult to find.