Do these bolt directly to my factory roof rails, or do I need adapters?

These mount straight to your factory roof rail system at the OEM attachment points — no adapters or brackets needed. Your existing roof rails handle all the connection work.

What kind of cargo carriers will work with these bars?

Any carrier, basket, or rack designed for standard aluminum cross bars will clamp on. Measure your bar diameter and check carrier compatibility specs before ordering a carrier separately.

How much weight can these bars handle?

Roof weight limits are determined by your vehicle's factory specifications — consult your owner's manual for the max roof load capacity. The bars themselves are built to handle standard roof-load duty, but your Explorer's structural rating is the real limit.