1.) Why not just chuck a narrow wide on your current cranks? 2.) didn't know you could use BB30 cranks with BB86?
You can't use a proper BB30 crank on BB86 as the shell is too wide. Rotor 3d+ or similar 30mm (386evo?) cranks work ok with their 4130 BB as they have a wider axle and use spacers when run in bb30 shells.
@danb started
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1.) Why not just chuck a narrow wide on your current cranks?
2.) didn't know you could use BB30 cranks with BB86?