Single (DH), 104mm BCD chainring and bashguard kits sold separately. Gold aluminum chainring bolts supplied with crankset Updated HollowTech-II Saint design with a lower Q-factor, improved ankle clearance, and more BB thread engagement in a lighter (-90g) and stronger assembly than previous M800/805 models M810-1: 68/73mm shell (for 50.4mm chainline with 135mm frame spacing) M815-1: 83mm shell (for 57.9mm chainline with 150mm frame spacing) Hollow-forged aluminum arms with extreme-duty spider and steel pedal thread inserts for increased power transfer and impact protection Integrated spindle, wide-stance bottom bracket with outboard bearings offer increased rigidity Includes HT2 bottom bracket for 68/73mm or 83mm shells (BB92 and BB30 adapter bearings available separately) 935g (with BB set and separate chainring+guard)