R18 FE mirror stem thread size

[kate_brett]

Hi, looking at purchasing new set of mirrors. When choosing , there are various options for thread size ( where stem screws in near bars ).
1/. 10 mm 1.5 pitch for BMW
2/. 10mm for metric bikes

Anybody know what l need to select?
Thanks, Brett.

 

[Gr8adv]

Hey Brett, I don’t have the number but as another option I bought some threaded Arlen Ness mirrors that are threaded that slipped through and I nutted on the bottom of my FE. Maybe revzilla will have that diameter. I am out of town or I would measure.

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[kate_brett]

Thanks