Rear view of frame. The rear jig allows up to 130 mm clearance between dropouts. My Alfine 11 speed internal gear hub requires 135 mm clearance. After discussing with BBS, the recommendation was to add 5 mm spacer (extras in kit) between drops in the jig AFTER re-configuring the jib for vertical mounting. This allows both dropouts to move away centerline 2.5mm...if this spacer is added while the frame is still mounted horizontally, the upper (driveside) dropout will lift up 5 mm away from centerline. Thus the dropouts will no longer be equal distance from centerline.