Originally Posted by Scrodzilla

I've never had the wheel slip on either my Kagero or my Dodici Gara, both of which have double-sided stainless inserts.

The only time I ever had a wheel slip forward was when using a Phil Wood hub on my Leader 725 - mainly due to the Phil Wood axle hardware. I switched hubs and my wheel never slipped again. If axles aren't slipping all over the place on a steel frame, they're not going to be slipping on an aluminum frame with steel inserts.

I've seen some bikes with single-sided dropous get chewed up pretty bad and unfortunately, not everyone knows how to properly tighten their axle nuts to prevent such damage.