Can I use an outboard Shimano BB on a Trek madone ALR (alum.) with pressfit BB? my 2015 Trek Modone ALR road bike has a press fit bottom bracket.   compared to my 2012 madone, the bottom bracket has much more drag.
I always liked the Shimano Hollowtech outboard bottom brackets and would like to install one on my TREK ALR.
Is there a conversion kit for this purpose?
Thanks
No. The BB90 design puts the bearings the same distance apart that a normal external Shimano BB would, hence a normal Hollowtech 2 road crank being able to run on it.

It may be possible to make a BB386EVO adapter for BB90, but if so I don't think anyone's done it.