Wheels Manufacturing PF30 Outboard Bottom Bracket - For 30mm Spindle ABEC-5 Angular Contact Bearings PressFit Thread Together BLK MFPN=CSM96.9AV0.NS1.BX Use a stock 10mm chainring

Use a stock 10mm chainring bolt for the fifth

Ski Empower: Yes

this is the one you want

and a full metal edge for security on hardpack and ice

Cannondale

Wheels Manufacturing PF30 Outboard Bottom Bracket - For 30mm Spindle ABEC-5 Angular Contact Bearings PressFit Thread Together BLK MFPN=CSM96.9AV0.NS1.BX Use a stock 10mm chainringWheels Manufacturing PF30 Outboard Bottom Bracket for 30mm cranks with Angular Contact Bearings Black. PF30 Thread TogetherReplaceable Enduro bearings Made in the USA TECH SPECS Bottom Bracket Shell I. D. 46 BB Frame Interface PF30 BB Frame Interface Specialized Carbon OSBB BB Shell Width (mm) 61 BB Shell Width (mm) 68 BB Shell Width (mm) 70 BB Shell Width (mm) 73 BB Shell Width (mm) 79 BB Shell Width (mm) 83 Weight 151 Spindle Interface Type RaceFace