The ASUS RT-AX55, sometimes called the ASUS AX1800, is a dual-band Wi-Fi 6 router with 2.4GHz and 5GHz bands. It features four LAN ports and a WAN port rated at 1Gbps speeds. It's compatible with ASUS' AiMesh, which allows you to use other ASUS routers as additional mesh access points.
Our Verdict
The ASUS RT-AX55 is a decent router if you live in an apartment, condo, or single-story home. It delivers speeds suitable for 4k video streaming across a single floor, whether you're right next to it or in a different room. It also has adequate wired connectivity with four 1 Gbps LAN ports. The antennas are rather tall, but the router is of a reasonable size and will fit into most living spaces. It also has screw head slots on the bottom, so you have the option to mount it on the wall or ceiling.
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Good top speeds.
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Wi-Fi 6 won't take full advantage of new Wi-Fi 6E or 7 devices.
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Lacks DFS support, so it can't avoid more congested channels.
The ASUS AX1800 is a decent router if you live in a multi-level house with a backyard. It provides sufficient speeds for high-bandwidth activities like 4k video streaming, whether you're on the same floor or two stories above. Its speeds are also good enough for high-bandwidth use if you're on your deck or in your backyard, but you'll likely experience dropouts if you're very far away from your house.
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Good top speeds.
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Decent range.
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Compatible with AiMesh devices to create a mesh network for better range.
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Wi-Fi 6 won't take full advantage of new Wi-Fi 6E or 7 devices.
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Lacks DFS support, so it can't avoid more congested channels.
This router delivers good speeds suitable for an internet connection of up to ~700Mbps. However, it doesn't support DFS (Dynamic Frequency Selection), so it can't access DFS-only channels, which would help its speeds in congested wireless environments.
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Good top speeds.
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Wi-Fi 6 won't take full advantage of new Wi-Fi 6E or 7 devices.
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Lacks DFS support, so it can't avoid more congested channels.
This router has decent range, but it's a standalone unit, so depending on your home's size, layout, and construction, you might experience dropouts. It supports AiMesh, so you can pair it with compatible ASUS devices to improve its coverage.
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Decent range.
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Compatible with AiMesh devices to create a mesh network for better range.
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Wi-Fi 6 won't take full advantage of new Wi-Fi 6E or 7 devices.
Differences Between Sizes And Variants
The ASUS RT-AX55 doesn't have any variants, but it's often called the ASUS AX1800. Here's a photo of our unit's label.
Compared To Other Routers
The ASUS RT-AX55 is a dual-band Wi-Fi 6 router in the budget price bracket. It doesn't have many additional features like a USB port for local file sharing or support for the faster 160MHz bandwidth. However, it supports ASUS' AiMesh technology, which allows you to connect ASUS routers as additional mesh access points.
Performance-wise, it delivers speeds similar to other routers in its price bracket, like the TP-Link AX21 and the TP-Link AX20.
Test Results
This router has a pair of screw head slots on the bottom, so you can easily mount it to your wall or ceiling.
This is a standalone router, so the mesh satellite position line on this graph isn't applicable.
This is a standalone router, so the mesh satellite position line on this graph isn't applicable.
