Guys, as somebody posted here, it will cope up with the passenger with no trouble, but its not build for that. its primerally build for those that carry bags behind you as the nanny steps in because she thinks you have pasenger and not 10kg bag behind ya.
when the nanny was doing it to me, i was feeling unsecured as the bYke did behave differently... much much differently and constantly braking wheels in corners
yes, you can use it also with passenger, but just be careful. This button can carry i think very easy 150kg... and more.. that is about 330+ pounds.
also please be aware that in RT button also adjust the rear "pillow" specially on new RT20+
so again you can use it.. you will trick the nanny, but;...
also you can remove and replace it at any moment,. its super easy to return the stock button when needed.
also this button fix the rattling on F3 and F3s of the monoseat cowl and passenger seat.
and yes it is our best seller, we have about 500 buttons out there already/
have an awesome weekend guys,
martin