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I installed them per the instructions, lining up the front rail with the triangular marks. But it appears to be on the sloping portion there. Has anyone else noticed this? Or shifted the front rail back to the horizontal portion without any issues?
I've run mine further back with a 30 lb mountain bike. No problems. It depends on how much weight you're going to put up there. the more weight, the more closely I'd adhere to those marks!