Number of issues.
It is very seldom that you will get anywhere near the maximum throughput on a wireless connection.
The design speed for 802.11n is 50-144Mbps (that's Megabits per second. MBps is Mega Bytes and there is 8 bits in a byte).
The speed ratting of the wired Ethernet ports on a router has o bearing on the speed of the wireless router. However, there is a consideration if you are transferring data between a wired device and a wireless device.
The upstream connection from the router is usually subject to the speed you purchased from your ISP nad may be in the range of 1 MegaBits per second for slow DSL to 20 Mbps for FIOS). Cable's DOCSIS 3 will change cable speeds to upwards of 120 Mbps if when it is rolled out at the max rated speeds.