If you want an all black stem that's light and strong enough for enduro why not the Race Face Turbine? It's lighter than the apex. I have one on my Rocky Mountain Altitude and it's plenty stiff. Or is it the wrong flavor Kool aide?
Im sporting a 50mm Atlas tooWent for a Race Face Atlas instead...
I've never broken a stem before... the Easton Haven stems look sleek... reckon they'd be ok for Enduro/DH?