Slow Wifi speeds, but fast ethernet speeds
I recently signed up for 1gig fiber and have disabled the wireless on the AT&T modem/router, and am using my own Linksys ac5400 router. I setup passthrough on the BGW210-700 modem/router for the Linksys router, and set the Linksys router up as a bridge. I am getting 800/800 when connected via LAN on the Linksys router, however, when I am connected via wifi, I am only getting 150/80 speeds. I am connected to the router at 866.7Mbps, so I should be getting speeds a lot quicker than that. I used to be with Comcast, and I used to get a consistent 170Mbps download (on a 150Mbps plan), so I know I can download quicker than that.
Does anyone have any ideas on what could be causing the slower wifi speeds?