Quarq Dfour Fit Problem I recently buy my first Quarq Dfour power meter to replace my crank Shimano Ultegra 6800. but I have the problem that the quarq spindle its too short ( 106 mm quarq vs 109 mm shimano ultra ). I don't know if I buy the correct quarq ( GXP or BB30 ) and I don't know if I need change my bottom bracket ( actually I use Kogel Press Fit BB30 to 24 ceramic.)

I want use the quarq but I don't know how fix this issue.

Do I need change my actual bottom bracket to another ? ... que quarq dfour its correct for my frame ? ( my bike is a Felt IA2 2016 ) ...
@Victor this can be made to work.

The new crank has a GXP interface spindle, you can notice that by a notch before NDS arm splines start, which serves as a stops against inner bearing race, and the fact that splines are on non-drive side (SRAM BB30 splines are on drive-side). Since GXP is a Truvativ/SRAM variation on 24mm spindle, it should fit everywhere Shimano 24mm Hollowtech II fits. The spindle length is no problem, BB30 bottom bracket shells are the narrowest (68mm, FC-6800 is designed around 86mm bearings stance), so with the right bottom bracket you could install almost any crank, so all you need is a BB30 to GXP bottom bracket.